Here's Why Chevy Dealerships are Crap
Scotty Kilmer:
rev up your engines
Michael cologne he says 07 Acura
RDX 90,000 miles called P2263 issued a
check engine light the dealer once
replace the turbo for six grand it pulls
fine and I don't feel any difference I
can't pass inspection please help yeah
you know when you get vacuum leak or
stuff wrong with the system it won't
pass emissions testing they're trying to
say the problem is in your turbo it very
well could be but if it runs okay so
you're stuck between a rock and a hard
place find a mechanic like me maybe he
could just reset it drive it a little
and if it'll pass the emissions test
then go get it tested right away I do
that for customers all the time when he
got some nagging thing that's gonna cost
a fortune but it runs okay a lot of
times you can reset it if it's got some
kind of a vacuum leak at least just
patch it with duct tape or something you
just take duct tape up if you want as
long as it runs okay you know there's
always ways to get around stuff if four
car runs perfectly fine door somebody's
trying to rip you for that kind of money
now if you do have to replace the turbo
don't pay 6 grand don't go to a dealer
you can get refurbished ones from many
places all over the world online and
replace it with a recondition one this
places that will take yours and
refurbish it for you Greg says Scotty
is a 2.7 liter EcoBoost a good reliable
engine over time understand what
EcoBoost is it means that it's GDI
gasoline injection with insane
high-pressure spraying of fuel directly
in the engine and also turbochargers
which brings more air in the engine so
there's more pressure in the engine and
guess what the more pressure the fast or
something will wear out over time if you
took that same engine and it was just a
normal engine with fuel injection and no
turbos and drove them both in the same
vehicle the one that's the EcoBoost is
gonna wear out faster and it's just the
way that it goes strain more they're
gonna wear out faster they work fine for
you know usually the first few years
100,000 miles or more
but eventually it will wear out fast to
realize that if you're the type of
person to trade your vehicle in every
100,000 miles your style you probably be
happy with but if you want really really
long-term now you better not to buy that
complex stuff Senya treasure like says
when should I change all the fluids in my
2014 Durango Hemi I only drive 5,000
miles annually well oil it doesn't
matter its mileage and/or age so you
want to change the engine at once a year
use good synthetic oil change it once
here that's fine the rest of the stuff
you're probably gonna go more by time
than mileage like I would change the
transmission fluid but if you only
driving 5,000 miles a year I change it
once every five or six years yeah and
the coolant you go by the not the
mileage but the year like a few at that
Toyota hoat coolant that's good for up
to seven years the Dodge coolant I
believe the factory stuff is good for
five years find out how long it is and
then change it by the years not the
mileage because things wear out over
time
find out what time for each and change
it at that time instead of the mileage
because you're not putting on the
mileage they still degrade over time
specially the engine oil, J Texas 1974
live free or die Scotty can you
tell me how long you can drive a car
with a failing or bad torque converter
thanks well of course that depends on
how bad the torque converter is yeah I
got customers with torque converters
that are weak that drive them for years
and years and years in my 94 celcia has
an automatic transmission the torque
converter is weak but it was a weak when
I bought it used and it's still weak and
I still drive it the only problem with
that is it shakes a lot in drive so when
you're driving if you leave it and drive
the engine shakes and idle I just put it
neutral and it runs smooth this can be
so I Drive it that way I really don't
care I'm not gonna take the transmission
off just to change the torque converter
and if it still works like that who
cares but there are torque converters
that physically fall apart when they
start making noise or when the gears
start to slam into gear when you're
driving then they're not gonna let us
talk that long it depends on how badly
worn they are cuz they will wear in
different models in different ways some
of them just have bad welds GM had some with bad welds
when the welds break then it starts
falling apart clang and then you got to
change it sooner than later or it will
destroy a bunch of other stuff Garcia says
Scotty I was a feeling driving on GT
Mustang 65 I've been 2005 in a Celica
2002 I feel like you oh yeah yeah the
old cars the fun to drive they're real
cars that's said
they're not like a modern car you get
turn the key and take off and that's all
you got to think about stuff that's 65
GT that I was showing it's got a hand
choke you gotta start it up play with
the chock a little let it warm up a few
minutes before you drive it seriously
and you know it's a standard
transmission so you gotta shift gears
and it's an old one so that's the clutch
it's relatively stepped you got to be
used to pushing down on that hard clutch
with your left foot the only thing I
ever drove this stiffer than that was a
customer had a Corvette and that you
he had to use both feet on a
clutch pedal to get it down it was so
hard to push it down on that Corvette
they were notorious for having sticky
clutch pedals but you know it's another
experience you're actually being part of
the Machine and you feel it and you get
feedback and bumps and it's a real
driving experience you know if you're
the type of person that just wants a
smooth thing definitely get a new one
don't get it old one, station money says
I got a 07 Ford Focus that has a
pinging sound under load when I use 87
octane using 89 there's no pinging how
can I get it to stop pinging when using
87 octane you know the problem is it's
12 years old
it's just worn with the higher octane
gas I mean you're better just to use it
because all kinds of things are going on
there it's probably that your timing
belt your timing chain is worn somewhat
the engine has a little carbon in it I
mean if you want to try my advice would
be paying mechanic like me to carbon
clean your engine because if there's
carbon buildup that increases the
compression ratio and you need to higher
test gas so it doesn't ping sometimes on
those just having them carbon cleaned
then they'll run normal on the cheaper
gas I tried that burst they make the
most logical thing to do
keoki Tara's says Scotty I changed the
sway bar links on my 08 Pontiac g5
but it still rattles when I hit bumps
what could be wrong you change the sway
bar links
those are links at the end right the
sway bar itself has to hold downs they
have rubber bushings on them check the
rubber bushings they could be worn out
too but of course realize there are a
zillion things that can make rattling
noise on a suspension system jack it up and
pull on it and hope you can duplicate the
noise now if you can't I have a video
called finding the source of car noises
watch that video and with that machine
if you don't want to buy one you're
gonna use one on eBay for like 50 60
bucks or a new one 410 bucks it will
pinpoint any sound in a car but check
the bushings first you changed the
links on the end of the bushings are
worn it'll still rattle around when you
hit bumps, res says toyota oem coolant
or third party pink
acceptable it's okay to mix different
brands of engine coolant all right well I always try to use the same thing but what's
in them is what counts and from my
experience I look around all the pink
and red coolant that I've ever found was
whole coolant hybrid organic acid
technology called the new style one that
Toyota's use and as long as it's hoat
coolant you can mix them it's perfectly
fine just like any olden days you didn't
care if you use impressed on coolant
factory GM coolant whatever as long as
it was the same type the older type
coolant was called inorganic acid
technology IAT and the new one is OAT
organic acid technology and the real
fancy ones like Toyota's are Hoat hybrid
organic acid technology as long as you
keep the same oats or hoat coolant in it
it's fine you can mix them, mike says
Scotty my 2015 Mazda 3 left front wheel
vibrates at 25 to 35 but it goes away at
a higher speed what can cause that you
got sympathetic vibrations in there
odds are to be rebalanced or the tiger
might just be shot go to a good place
where they balance tires have them check
the balancing of the tire if it's off
balance that can do that or it's a tire
itself a shot that often happens when
they're made of various belt wound
around in a circle and if the belts
break internally then they're no longer
perfectly round and at a certain speed
they'll go like mad but don't want to
get spinning faster it expands out and
becomes perfectly round again so had the tire check praise just needs to be
but if the tires crap pink albino your
tire because that will do different
things at different speeds cuz it's
rubber and can stretch and change as it
speeds up it's not like a man on a solid
steel where the speed doesn't change the
shape, Steven Mayer says Scotty are you
stoned dusted sunglasses no I'm blind as
a bat if I take them off I am blinded
and I have studio lights pointing at me
so you can see me otherwise you wouldn't be able to see me all that well I put
them on I don't look as old it's a
show business thing with sunglasses on
you don't look as old but now I'm not
stoned I haven't done that stuff since
college and that was let's see 42 years
ago that's what I graduated, game says
Scotty I have a 2010 Mazda 3 the sound
stopped
I had the Bose package mechanic told me
to replace an amp or get a new radio why
are the speakers what should I do
yes when you buy a vehicle with a fancy
stereo system and it breaks often either
to get new parts hardly anybody ever
fixes them right or to replace the whole
thing with a factory unit cost a fortune
you're better just going aftermarket I
do it in all my cars because the
aftermarket stuff these days every two
years they're they work twice as well
and it cost half as much so your carts a
few years old
you put modern stereo in sounds tons
better and it costs pretty nothing
compared to the original
so do that just get another new one
research what particular ones you want
like if you don't have an android and you want to
put an android in now if you want an
Android there's good androids out there now
for a little was doing her 50 bucks
don't buy the $80 androids they stink
I've tried them out but the more
expensive ones they're pretty good
androids that are easy to wire it I got
a video on that it's it's not that hard
to do,
so if you never want to miss another one
of my new car repair videos, remember to
ring that Bell
I Hate Car Ads | Jim Trenary Chevrolet
Jim Trenary Chevrolet:
Come on down to Insane Dwayne's automotive where we're slashing prices on all makes and
models on the lot. We must be insane!
Zero yelling. Zero stress. That's how we do
business at Jim Trenary.
Dude that was my TV! Shh... Zero yelling.
Man, don't you just hate car ads?
How to Set Tire Pressure Monitoring System 07-13 Chevy Silverado
1A Auto Parts:
I Hate Car Ads | Jim Trenary Chevrolet
Jim Trenary Chevrolet:
0.25% down, 0.01% financing
for up to ten years! We're practically
giving these cars away. We must be insane!
Zero gimmicks. Zero pressure. That's how we do
business at Jim Trenary. You have got to
be kidding me! I know man. I hate car adds too.
Ha ha! This cat's climbing out of a backpack. I'll
send you a link.
Why Not to Buy a Chevy with Traction Control
Scotty Kilmer:
one, two, three, four!
Rev up your engines!
It's time for the Scotty Kilmer Channel
today I'm going to show you why you
might not want to buy a GM product with
traction control on it, now this van only
has 45,000 miles on it, but the traction
control light is coming on, which means
that the traction control system has a
problem and we've got to figure out what
it is, now when I hook up my little scan
tool it shows that it has CL 131 which
is traction control system problem with
a pressure system, but in order to
analyze and actually repair the problem,
I need a much fancier scan tool like
this ODC encore, to get into that complex
data, then we select the ABS system and
we basically have to check all these
different data systems, to figure out
what's wrong, which consists of this data
and all this data and then checking
through the code assist is library, it
suggests the brake pressure modulator
valve is bad, and you can even look it up
on google, which also has articles that
suggest the brake modular valve
assembly is bad, and unfortunately the
brake modular valve is built into the
entire modulated assembly, which has to
be replaced, as a unit, and not only is
this unit hard to replace, you saw
those lines that have to be taken off
and the air bled out, but that unit cost
898 dollars, plus on this model, nobody
else can get them, it's a dealer only
item, so you got no choice of where to
buy it from, because they fail quite
often on these things and if you try to
use one from a junkyard
odds are, it either wouldn't work or would
break soon after, you put it on, now with
only 40 something thousand miles on the
car, I think it's kind of a shame that
that system broke down already,
but with the use of such complex
electronics, it doesn't surprise me at
all that they do break down, they're so
complicated, they have so many moving
they do break, man they can often cost a
fortune to repair, now it's one thing if
those complicated systems don't break
down, my wife had
a Toyota Cressida, it was 28 years old and
it still had a working system we never
had to do anything to it, but if you're
thinking about buying a GM vehicle, it
was an option on this one, get the one
that doesn't have that option, stay away
from their complex electronics on them,
because when they break down they cost a
ton, but on the positive side, when they
do break down, they go back to failsafe
non traction control and they just drive
like a normal car, so why not just buy
the normal car in the first place, and
remember if you have car questions just
visit the Scotty Kilmer channel
GM Instrument Cluster Repair and Service
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2020 Chevy Traverse LT Review - Chevrolet Traverse Review - 5416
Chevy Dave:
- Hey, what's up everybody?
Chevy Dave here from Deien Chevrolet.
I'm gonna do a quick walk around
on this brand new 2020 Chevy Traverse.
We just got this vehicle in.
If this is your first time
checking out my channel,
I'm Chevy Dave.
I do vehicle reviews,
along with give you guys
some great industry information
to help you out with your
next vehicle purchase.
If you're on the market for
a new or pre-owned vehicle,
make sure you check out my
website www.ChevyDave.com.
I actually have a free buyer's guide
that you can download,
gives you some great information
to help you out with your
next vehicle purchase.
But if this is your first
time checking out my channel,
make sure you hit that like button,
make sure you hit that subscribe button,
and make sure you turn on
that bell notifications,
so you don't miss out
on any future videos.
Also, stay tuned,
I am going to give away this $25 gas card,
so I'll let you know
how you can get entered
into the contest for that here shortly,
so, just let's take a look
at this 2020 Chevy Traverse.
(upbeat piano music)
All right, so here's a
look at this 2020 Traverse.
This is a front-wheel drive 1LT
Traverse that we just got in.
This is brand new for 2020,
it's got the, it's in the
silver ice metallic color
with a jet black interior,
which is the cloth interior on the LT.
It does have a 3.6 liter V6 motor in it,
gets you about 27 on the highway
and around 18 in the city,
as far as the fuel efficiency on it.
This does have the confidence
and driver convenience package,
and I'll list all that out
as far as in the description of this video
so you can see exactly
what's all in that package.
This is just gonna be a quick walk around
on this 2020 Traverse.
If you're interested in this
vehicle or wanna learn more,
feel free to hit me up,
all my contact information
is below in the link of the
description of this video.
We can schedule a time for you to come in
and check it out.
Or we can, I can get you
some more information on it.
It does come with a three year,
36 bumper-to-bumper warranty,
along with a five year,
60,000 powertrain warranty,
and the Deien's Own Lifetime
Powertrain Warranty.
On top of that, I can ship
vehicles across the country
or have a vehicle just like this
drop-shipped to a dealership near you,
so you can just go in
and just sign the papers
and drive off with a brand new Traverse.
Let's take a closer look at
the interior of the vehicle.
All right, so it does have keyless entry
with remote start, along
with a rear hatch release,
and it does have the proximity lock,
it unlocks so you just walk
up, hit that button there,
and it'll lock and unlock the vehicle.
It does have the power windows,
you got your power locks up here
plus your power mirrors,
and then it does have
the selectable height
for the rear lift gate,
so you can pop it from
there or use the key fob.
Here's a look at the interior.
You have cruise control,
Bluetooth and steering wheel controls.
Just a little quick glance over,
so this is the jet black,
I know it says jet black but
it's almost like a charcoal,
as far as the interior color.
The driver seat's power
and then the passenger
seat is gonna be a manual,
as far as adjustability.
And then here's a look in the back,
you do have the power windows back here,
plus you do have the rear
climate controls back here,
plus two USB charging spots there,
and then, of course it
is a third-row vehicle,
here's a look in the back
as far as the third row.
Lots of room as far as
in the back cargo area.
And something I do on all
my third-row vehicles,
is to kind of show you the ease
of gettin' into the third row.
So on the passenger side,
which is usually where you
pick up your kids or grandkids,
you just pull on that lever right there,
and it slides all the way up,
so you could still actually still have
a front-facing car seat in here,
and it's not gonna hinder as far as
how much room there is to
get into the third row.
But then, if you look here
there's quite a bit of room
to get into the third row,
and it looks like we
need to vacuum back here
a little bit more, but our
detail guys kinda missed a spot.
But, quite a bit of room
to get into that third row
from the second row.
All right guys, here it
does have keyless entry
with remote start, along
with the rear trunk release,
so you hit this button right here twice,
and that'll actually pop
your rear hatch release.
And then here's a look back here.
The seats do fold down if you
ever need to haul anything,
and then there is also USB
ports over on the side,
there's one right there on that side,
and also one on the other side,
so you can hook up something
and charge it if you need to,
which, you know if you have
kids and stuff like that,
definitely always need that.
It does have a storage
compartment down underneath here.
And then it does also
have a 12-volt outlet
over here on the side.
And then to close it, you just
hit this button right here,
and then it'll motorize down.
All right, and then here's a
quick look at the interior,
we do have, like I said,
cruise control, steering controls,
and then the Bluetooth controls there,
it is a push button start,
here's a look at the
AM/FM Chevy MyLink radio,
It does have the far slide-up,
little compartment back underneath there.
It does have AM/FM and
satellite radio capability,
it does also have a
standard backup camera,
and then you do have the heated seats,
it is a dual-zone as far
as the climate controls,
and then you can also
control the third row
temperatures all from back
over here on the radio,
and then you do have two
USB ports and then a AUX in,
and then the 12 volt outlet down there,
and then down here you
do have your drive mode,
and your touch control off button
right there in your electronic
parking brake there.
All right, so once again
this is Chevy Dave here
from Deien Chevrolet.
This is a look at our brand
new 2020 Chevy Traverse,
this is the LT model,
if you want more information,
or want to schedule a time
to come in and check it out,
all my contact information is below
in the link of the
description of this video,
but feel free to give me
a call or shoot me a text,
and we can schedule a time
for you to come in and check it out,
or I can get you some more information.
If you're on the market for
a new or preowned vehicle,
make sure you check out my website,
www.ChevyDave.com.
I have a free buyer's guide down there
that you can download,
and then also while you're
there, make sure you sign up
to become a Chevy Dave celebrity member,
its a free private group
that I do lots of contests,
I give you guys some great
insider information as well.
Plus, that's where you register
to win this $25 gas card,
so go ahead and register today,
and get entered into the
drawing for the gas card.
I do at least a gas card a month
giveaway out of that group,
sometimes I do more, and
then run different contests
and stuff like that as well, so,
make sure you give me a thumbs-up
and make sure you hit
that subscribe button
and turn on the bell notification as well
so you guys don't miss out
on any future videos as well.
Also, drop me a comment below,
let me know exactly what you
guys think about this video,
and about this vehicle,
I love hearing from all my
viewers and subscribers,
and also where you're
checking the video out from,
I like seeing the reach that I get
in all my videos as well, so, once again
this is Chevy Dave here
from Deien Chevrolet,
we're located about 40 miles east
of St. Louis in the metro-east area,
we are a small town
dealership with the big deals,
come see me, Chevy Dave here,
I make car buying great again.
Thank you for checking out this video,
I hope you have a wonderful day.
(upbeat techno music)
How to Connect the 4G LTE Wi-Fi Hotspot in Your Chevrolet
Will Tinney:
Today we are going to talk about OnStar's 4G LTE
Wi-Fi hotspot. I'm going to show you how to do it, it's real easy to do.
First thing, we are going to get your Wi-Fi hotspot password
from OnStar. "Welcome to OnStar" Say "Wi-Fi Settings"
"Please see the owners manual for your Wi-Fi Settings"
At that point you go to the settings on your phone.
I have an Apple, if you have a Droid you go to the settings too and go to your Wi-Fi access.
You can see right here it says "Wi-Fi hotspot"
All the GM vehicles will say this.
Engage that and then it will ask you for the password
I got to put in the password which is indicated up here
in the display.
OK, now I'm all connected! See now it's connected to the car.
At that point I can run up to 7 devices off my hotspot
all at the same time. So if you have
an iPad you can stream a movie…
All of this while driving.
2019 Chevy Safety Features | Jim Trenary Chevrolet
Jim Trenary Chevrolet:
What's up everybody? Benny here with Jim
Trenary Chevrolet in O'fallon
Missouri. Today we're gonna run through
the safety features available on the
2019 models. Safety is often times the
most important consideration a customer
can make when deciding to purchase a new vehicle.
That's why Chevrolet offers a wide range
of available features and technologies
to help you and your family drive with
confidence. Let's start with the Front
and Rear Parking Assist. When the vehicle
is below 5 miles an hour, the Front and
Rear Parking Assist provides distance to
object alerts in order to help the
driver park and avoid crashing into
nearby detected objects directly ahead
or behind the vehicle during low-speed
maneuvering. Next is the Rear
Cross-Traffic Alert. When in reverse the
Rear Cross-Traffic Alert helps the
driver avoid crashing into approaching
detected left or right cross traffic. For
example out of a crowded parking space
or driveway with the blind spot
obstructions. Speaking of blind spots,
Lane Change Alert with Side Blind Zone
Alert provides side mirror alerts to
help the driver avoid crashing into a
moving vehicle detected in their side
blind spot or zone or a vehicle rapidly
approaching from their side blind spot
during a lane changing maneuver. This can
be especially helpful for families with
large amounts of groceries or luggage
feature is called Lane Keep Assist and
Lane Departure Warning. This provides
gentle steering wheel turns and alerts
if necessary to help drivers avoid
crashes due to unintentionally drifting
out of their lane when they're not
actively steering and their turn signals
not activated. However, if you find
yourself drifting off the road during a
long road trip, don't rely on
Lane Keep Assist or a vat of
strong coffee to keep you safe. Do
everyone on the road a favor. Either
switch drivers or find the nearest hotel
and call it a night. Sound good?
Alright, moving on. Intelabeam Headlamps. These
will activate the high beam headlamps to
illuminate the road ahead and improve
visibility especially in dark conditions.
With the help of the front camera
mounted on the windshield in front of
the inside rear view mirror, the system
recognizes the headlamps or tail lamps
of another vehicle and automatically
switches the headlamps to low beam in
order to prevent impairing the vision of
drivers and other cars.
Next up, Adaptive Cruise Control. Adaptive
Cruise Control enhances regular cruise
control to allow the vehicle to
automatically follow a detected vehicle
ahead at the drivers selected following
gap while the driver steers, reducing the
need for the driver to frequently brake
or accelerate. Now I know what you're
thinking. Benny, what if I misjudged the
following gap and I start following the
car in front of me wait too closely? Well
I'm glad you asked and that brings us to
Forward Collision Alerts. Forward
Collision Alerts tell the driver that a
front-end collision situation is
imminent while following a detected
vehicle. The system will also alert the
driver if the drivers following detected
vehicle much too closely. Subsequently
Low Speed Forward Automatic Braking
occurs when the vehicle is traveling
below 50 miles an hour and the system
senses that a front-end collision with a
detected vehicle is imminent. The system
automatically applies the brakes to
potentially help reduce the severity of
impact. It may even help avoid an
accident altogether at very low speeds.
And finally, the GM patent Safety Alert
Seat. The Safety Alert Seat provides the
driver the option of getting haptics
seat bottom vibration pulses instead of
audible crash avoidance alerts. And don't
forget, safety or driver assistance
features are no substitute for the
drivers responsibility to operate the
vehicle safely on the road. Stay
attentive to traffic, surrounding areas
and road conditions at all times. To
check out any of these features and
schedule a test drive, come in to Jim
Trenary Chevrolet in O'Fallon Missouri
or visit our website.
JimTrenaryOfallon.com
Chevrolet Bolt EV Traction Motor - Deep Dive
WeberAuto:
Hello, I'm professor John Kelly and this
is the Weber Auto YouTube channel.
In this episode we will be disassembling
the drive unit the electric motor and
gear reducer out of our 2017 Chevrolet
bolt on the hoist behind me here. now
this drive unit and electric motor
combination is is all one piece,
unlike the Nissan Leaf that has a drive
unit that unbolts from the electric
motor. This drive unit is rated at 150
kilowatts which is 201 horsepower, it is
also rated at 360 Newton meters of
torque which is roughly 266 foot-pounds
of torque.
Now let's let's talk about torque just a
little bit. That torque rating is what
the motor itself is capable of producing,
that is not the same as the torque that
ends up at the wheels of the vehicle, so
for example the Chevrolet Spark EV
produced by Chevrolet before the Bolt
here
actually had an electric motor that
produced 540 Newton meters of torque, the Bolt EV electric motor only produces
360 Newton meters of torque and so you
might be misled into thinking that the
Spark EV had more torque; well, the motor
did, but not the torque delivered to the
axles that drive the wheels. So the gear
reducer right here on the side of this
drive unit has an impact on that because
gear reduction is also torque
multiplication minus frictional losses, so
the Spark EV had a 540 Newton meter
electric motor but it only had a three
point one five to one gear reduction
unit which resulted in about 1700 Newton
meters of torque at the wheels, at the
axles. the Bolt EV electric motor
produces 360 Newton meters of torque a
whole 180 Newton meters less of torque
from the motor, but it has a seven point
zero five one eight to one gear
reduction through this gear reducer
which multiplies that 360 Newton meters
of torque by seven point zero five one
eight, which gives us over 2,500 Newton
meters of torque at the axles. So there
are other electric vehicles out there
that are being produced right now that
have higher torque higher motor torque
than the Bolt EV
but what would be interesting, I and
I don't know what their gear ratios are
yet, is to see what is the torque
actually to the axles what's the torque
to the ground because that's what you'll
feel when you step on that accelerator
pedal, that's the torque to the wheels
that makes the vehicle move. The design
of this drive unit this electric motor
it has a peak amperage draw of 400 amps
versus 450 as for the Spark EV so it
uses less current to provide more torque
so it's a more efficient better design
electric motor. The electric motor in
this drive unit spins clear up to 8810 rpm where the
Spark EV only spun up to about 4500 rpm,
and we'll take a look at some
differences in the electric motor design
and the stator winding design that
allowed it to spin at those higher rpms
without the AC losses that typically
occur at higher rpm. As mentioned in the
previous video on high voltage
components of the Chevrolet Bolt EV this
drive unit uses about 2.9 litres, around
3.1 quarts of Dexron HP fully synthetic
base transmission fluid automatic
transmission fluid. It also is cooled by
the General Motors Dexcool 50/50 mix
of coolant and deionized water. Okay
let's take a look at the outside of the
housing here of this drive unit. The
official name or designation of this
drive unit by General Motors is the
1ET25. The one means it's a one speed
trans axle, this doesn't shift, E means
it's electronically controlled, T means
it's a transaxle, and the 25 is a
relative torque rating. Alright, right
here on the front of the transmission is
the actual last eight digits of the
vehicle identification number and you
can see that MMF right there, that is
the three-digit regular production
option code the RPO code that you can
find on label in the back of the Bolt EV if
you take out the lower compartment
carpet and look in what looks like a
spare tire tub, there's a label on the
driver's side that has a whole bunch of
three digit codes on it
MMF just means that's which transaxle
or transmission this vehicle came with.
Okay right here on the top of the trans
axle is the transmission range selector
actuator and this is a brushless DC
motor with a gear reducer that actually
moves the shift lever to put us in to
Park reverse neutral Drive and low, now
technically inside of this drive unit it
there's really only park and not park,
but there is a position sensor in here
called an internal mode switch that will
monitor which position the transaxle
range selector is in so that the vehicle
can act appropriately. For example the
shifter itself on the center console is
not directly connected to the drive unit,
it's just an input to the computer that
controls this actuator, so when we go to
the reverse position for the neutral or
drive or low, there's a feedback on the
internal mode switch electrical
connector right here, that lets the
engine control module, even though this
doesn't have an engine, know which gear
range you have selected so that it can
request the trends axle act
appropriately. Also, right here by the
electrical connector for the internal
mode switch is the transmission fill
plug, so if you want to put fluid into
this transmission you need a 14
millimeter wrench or socket to take this
plug out and put the Dexron HP fluid
into the transmission. There are two
drain plugs on this transmission, one for
each side, so there's one down below on
each end of the transaxle the driver's
side and the passenger side, there's
there are two separate drain plugs to
get the fluid out of each side, now
there's only one fluid that goes
throughout this entire transaxle but
because of how its baffled and set up
inside to remove all the fluid you need
to remove both plugs.
Now speaking of fluid and fluid level
when you drain fluid at whatever the
recommended fluid change interval is or
if you're doing service work on the
transaxle here and you're adding fluid
you need to know when to stop adding
fluid, so on the other side of the
transaxle right here is the transaxle
fluid level check plug, so the drain
plugs right down here, the fluid level
check plugs here, the fill plug is on the
other side so you take the fill plug out
you take the fluid level check plug out,
and you add fluid until fluid comes out
over here, and then you let it sit and
stabilize for a minute add a little bit
more and make sure that fluid comes out
comes out to a slow drip, and then the
instructions tell us to put both plugs
back in and go drive the vehicle until
the transmission fluid temperature
reaches 35 degrees Celsius or 95 degrees
Fahrenheit and then double-check the
fluid level again to make sure that
comes out at a very slow drip. Alright,
while we are here on this side of the
transaxle we have an electric motor an
electric pump for the transmission fluid
so there's a big filter we'll see when
we take this thing apart down the bottom
center of this transaxle it will pull
fluid up from the filter and then put it
into what's called the oil sump so the
oil sump is basically just a great big
bathtub looking area up here that the
pump fills full of fluid and then there
are these little drain channels that
fluid drains down to cool the stator
windings and lubricate bearings and so
on and we'll see that once we get the
cover off so we have an electric 12 to 14
volt driven electric motor that pumps
fluid throughout this transaxle. From
what I read this pump only works when
you are in Reverse or Drive, it does not
pump when you're in park or neutral.
Alright, we have another electrical
connector right here, this connector is
for the resolver which measures the
angle of rotation the direction of
rotation and the speed of the electric
motor rotor itself, and then there's a
transmission fluid temperature sensor
that is in the bottom of this
transmission case cover here. All of
those are accessed electrically through
this electrical connector right here. As
you may have seen in my other video on
high-voltage components we have the air
conditioning compressor of the bolts up
here and then we have our coolant pipes
that go into what's called a coolant
sump in the bottom of this transaxle and
we'll see that here in a few minutes but
we have coolant going in coolant coming
back out and goes through a series of
cooling fins and cooling circuits to
absorb heat from the transmission fluid
right here on the back we have the
electrical connection for the
three-phase cables that come from the
the
single power inverter module that sits
two modules above here. Three-phase
orange cables come down to drive the
electric motor, there's a cover
the cables bolt on and then there's a
cover they'll holds the cable in place.
We have a transmission vent right here,
let's just take that vent off while we
vent tube off while we're here now you
can see the oil sump area again on the
top and the cooling sump coolant sump
area here in the bottom all right there
is one additional plug on the side of
the case with the electric motor and
there's nothing in the service
information to indicate this but I
believe this is a pressure test plug to
check the pump output pressure, but I
can't find any information on what that
fluid pressure should be. Okay, I'm going
to be disassembling this transaxle right
here on the workbench but there actually
is a special fixture to hold this
transaxle and allow you to rotate it and
disassemble different pieces of it and
still be able to rotate it for
convenience. I have this special adapter
as you can see here in this photograph
but the way it's mounted it's too high
and too difficult for me to disassemble
in that holding fixture being in a
wheelchair, so the workbench is where I'm
going to disassemble it, but I wanted you
to know there is a special fixture for
that and I tried it it just doesn't work
for me.
by the way this transaxle weighs about a
hundred and seventy pounds or 77.4
kilograms. Okay, well we're ready to
start disassembly, the first step is to
remove this oil pump the 12-volt power
oil pump, it has three bolts right here
and a few seals underneath it as you can
see here there are two seals that seal
the pump to the transmission case right
here there are two bolts that hold the
cover over the pump gears themselves
there are no instructions on
disassembling this so I assume we're not
supposed to disassemble it but that's
exactly what I like to do
take things apart I'm not supposed to as
long as I can get them back together and
make it work again here we go we've got
a Jew rotor style oil pump there's an
o-ring right here that needs to fit in
this groove to seal and then the cover
just bolts on okay the next thing on the
list is to remove the left-hand and
right-hand output shafts that go into
our differential side gears in the gear
reducer this is the left-hand side right
hand side over there it calls for a
removal tool for a manual transmission
so this is the pilot bearing removal
tool right here and a slide hammer and
we are supposed to put this up inside
and put it into the snap ring groove for
the CV shaft and then pop it out well
come to find out the snap ring groove is
thinner than the tip of this tool that's
supposed to go into it and I didn't
realize that's what the problem was and
I had a hard time getting these output
shafts removed I finally got him out but
once I got a mound got looking at the
tool versus what they were supposed to
be grabbing I realized I need to grind
these down make him a little thinner so
that they'll actually fit into the
grooves of the her for these CV shaft
snap rings that are there so since I've
had this entire transaxle apart before
and I'll put it all back together
I've removed those snap rings they'll
hold these output shafts in place so I
can just pull them out by hand right now
this big long left hand output shaft
goes right through the center of the
rotor of the electric motor itself it's
it's hollow in the middle
and it has a big heavy-duty bushing
right here on the outside with the axle
seal and this is our left-hand output
shaft and then the CV shaft itself plugs
into here that goes to the left front
hub and bearing assembly and tire and
we'll assembly so there's our left-hand
axle shaft there's a snap ring that fits
in that groove right there typically and
I've just removed and I've just removed
that snap ring for ease for this
demonstration here obviously I'll need
to put that back in when I reassemble
so that's the left-hand axle shaft on
the other side we use the slide hammer
again and pull out the right hand axle
shaft as you can see this one is much
shorter than the other one and it has
the support bearing in the differential
case itself that holds it in place and
its own snap ring that I've already
removed and of course an axle sill here
on the other side as well okay the next
thing on the list is to remove this
transaxle case to remove the case I've
got to take the linkage off and our
actuator off and then we've got these
bolts to go all the way around and then
we'll be able to see the gear reduction
transfer gear and the final drive ring
gear and differential gear set so I'll
take the clip out and lift up for a
linkage on the shift actuator and then
take the bolts out
okay here's the shift actuator assembly
itself transmission range selector
actuator kind of a great big piece I
I've seen some of these that are smaller
right I'm not sure why this one is so
giant I'm not I've never seen one this
big but it obviously does the job of
mechanically shifting the transmission
range lever since you have an electronic
shifter on your center console alright
let's take these bolts out of the trans
transmission case okay I've got all the
bolts out of the transmission case now
we can attempt to slide it off it has a
couple of dowel pins they'll hold it in
place there's a couple of pry points
plus one right back here and another one
right here there we go
I'm going to come in with a plastic
mallet here and just tap lightly there
we go okay we can see inside of the
transmission case itself and the only
things in here of real interest are the
transmission internal mode switch right
here we got the electrical connector
right here harness right there that
connects to this outer blue connection
connector that will read which Range
Park reverse neutral low you have
selected with your transmission shift
lever and then we have the parking
linkage right here we've got Park
reverse neutral Drive
and low now of course normally
transmission fluid would would be
pouring out of here of whatever didn't
get drained out when you drained it
previously but I've had this apart and
cleaned everything up before we have our
ring gear right here and our
differential gear set and as notice we
have real nice ball bearings here these
bearings since their ball bearings
instead of tapered roller bearings have
to have in place shims so there's a
special shimming procedure to control
the end play of these bearings that will
have to go through when we reassemble it
so you're supposed to take these shims
off and throw them away well and then
replace them with new new ones when you
go back together I suggest that you take
them off and measure them and then hang
on to them because you might you might
need them again when I took these off
previously and measured them they were
almost all identical in the thickness so
there are six of these shims for the six
ball bearings that are in this transaxle
four of these shims measured exactly
half a millimeter in in with the other
two one of a measure one millimeter in
width and the other one measured 0.9
millimeters so you need to keep track of
what thickness shim you had where and
write those down so that you you'll have
an idea of at least what it was before
you took it apart now if you're just
going back together and you haven't
changed any shims or any parts inside
just reuse the old shims but if you're
changing a bearing or any of these
internal pieces you need to go through
the special measurement procedure that
we'll see when we go back together to
determine if these shims are correct
okay so there's there's special shims on
each of these
bearings I've measured all of them RIT
written their dimensions on the ziploc
bag here that I keep them in and will
refer to those when we go back together
all right now we just need to remove the
counter gear right here and the final
drive a ring gear and differential gear
set this is where our short little
output shaft plugged in right here and
then our long one came all the way
through on the other side okay before we
remove these gears there is a an
aluminum gasket with a rubber seal
embedded into it the instructions tell
us that is not reusable
there is also an oil baffle right down
here to channel transmission fluid away
from the ring gear to reduce losses as
it rotates into it and to splash oil up
into different channels to lubricate the
the bearings if we look in this case
half right here you can almost see what
looks like a funnel right there for the
fluid to drain back down and lubricate
this outer bearing and a similar one
here on this other other side for that
bearing so we've got a oil baffle to
remove all right I've got the oil baffle
removed on the other side of that is our
magnet for metallic particles from gear
normal gear wear and other malfunctions
okay now we're ready ready to remove
these gears pull out on the counter gear
and then pull out on the final drive and
it'll come right out if you don't pull
out on that counter gear first there's
not enough clearance for the final drive
Unit two clear so here's our final drive
you can see our open differential gear
set inside there here's our sim on the
other side as well
all right the instructions tell us that
we can if we won't want to remove the
park linkage in the internal notes which
I don't really care about that that's
just regular stuff that you'd see in any
other automatic transmission so let's
continue on with things that are unique
to the bolt
evie drive unit here the one ET 25
transaxle so let's turn the transmission
case around and we'll take off the
transmission case cover here on the
driver's side
now the SAE document the details the the
bolt evey drive unit here that I told
you about in the high voltage component
video tells us that the drive unit
itself was designed to be serviceable in
the vehicle that's why they have a case
removable case cover on one side and a
case cover on the other side for the
gear reduction unit you can leave this
Center portion with the electric motor
in it in the vehicle and just remove one
or both case covers to do service work
on components inside the case covers
seal replacements resolver replacements
internal modes with replacement and so
on but anyway we're going to take off
this case
cover next from the driver's side all
right this case cover is going to be a
little harder to get off than the other
one because the rotor that has internal
magnets embedded inside of it has now
magnetically pulled itself over to the
stator because we are no longer
centering it inside of the stator itself
and so it puts a it pulls it off to the
side just a little bit so there's a
prying
right here
and there's a pride point right down
here another prior point right here
there we go okay so here's our case
cover and it has an aluminum gasket
that's not reusable as well our case
cover has this long transmission filter
that's not serviceable without
disassembling things as you can see has
a temperature sensor down inside of it
right there and then this is our
resolver our serviceable resolver that
measures the position speed and
direction of rotation of the electric
motor rotor inside the transaxle here
let's turn this around oh by the way
down inside of the bearing housing there
is a shim for the ball bearing right
here on the rotor itself so we're
looking at the stator and the hairpin
six conductor deep stator design a
unique design we'll talk about that a
little bit more once we get the stator
out we have a lubrication channel right
here where fluid is going to drip out of
our oil sump and run along and drop down
on to the stator windings themselves and
cool the the stator windings it also has
a drip channel that comes over and goes
down to this bearing here to lubricate
it
so we've just got an 8 millimeter head
bolt holding the filter in place and as
you can see the filter just has an
o-ring seal on the one side and you can
see the pick up filter screen filter
element on the inside so this is going
to reach all the way in up underneath
the the stator itself to pick up the
fluid on the back side of it and on the
back side of it is the inlet of the
coolant so that would be the cooler oil
on the back side there all right then on
the resolver it just has eight three
eight millimeter head bolts to hold it
in place and one electrical connector
this resolver only bolts in in one
location it's not adjustable it has
automatic learn unlike the older Toyota
Prius resolvers that that would actually
come out of alignment
if you unbolted them and there was no
way for you to line them back up okay so
here is our resolver pull back on the
connector position assurance clip
depress the tab and remove the resolver
itself the resolver is a serviceable
unit when and if it ever goes bad but it
should should never go bad all right
then the remaining wire harness and the
pass-through connector here just goes
over to our temperature sensor okay next
on the list we need to remove what is
called the center support this is what's
supported the driver's side ball bearing
of our differential case assembly
okay this is our center support it's
held in place with six bolts and aligned
with two dowel pins right there now with
that removed there's nothing to stop our
transfer gear from sliding out it's just
a tight fit on the bearing in the bore
as it should be just pray lightly
sometimes these will just slide right
out and right in and other times they'll
they'll fight you here we go okay so
here's our transfer gear it's ball
bearing and shim so put that shit over
here with the others okay right here in
the end of the case we still have a
lubrication channel right here from the
oil trough the oil sump I mean right
there and then we have a cover for the
three-phase electrical connector right
here as well then on the other side we
have that oil distribution channel right
here that cools the stator so we've got
to remove that we are now to the point
where we are ready to pull this rotor
out but we just can't grab on to it and
pull it out it has some super strong
neodymium magnets multiple layers envy
configuration inside of this stator
you're not going to pull it out by hand
and you sure don't want to come in here
and start prying on it so the only way
to get that rotor out of there if you
want to remove it for service replace a
bit bearing on it or the gear on the
other side or another bearing or just
replace the rotor itself for whatever
reason loss of magnetism and trouble
code sets or whatever
it takes a special tool to pull it out
without having it rub on the stator
frame itself and without having it
injure you with you trying to pull it
out and it's pulling back in with all
its magnetic strength so true get that
out there's a special guide tool that
will hold it centered in the stator and
we need to set that up next and it
starts on the other side here so there's
a special tool kit that costs almost a
thousand dollars to Center this rotor as
you pull it out I found one on eBay for
a little bit less than that but but it's
a very expensive tool but if you want to
do service work on this transaxle you've
got to have it so let's bring in the
special tools okay so I brought in the
special tools to keep the rotor centered
there's a special spacer with a notch in
it to clear that notch right there this
is just gonna fit in there just like
that then there's a plate that bolts on
over the top of this to hold it in place
these don't need to be super tight
they're just holding that little spacer
in place so I'll just lightly Snug those
up then there's a sleeve here that's
supposed to fit down the center of that
rotor but these sleeves are a little bit
too big I've had to take sandpaper and
send them down to make them fit inside
of this rotor and I don't know if that's
because the tools were made for a first
design rotor and then they changed it or
if they just made the tools incorrectly
but these tools are from what used to be
can't more tools the special tools
supplier for General Motors it's now
Bosch service solutions so Bosch you may
want to take a look at this this tool
here the DT five two zero one one
- one - three because it doesn't fit
it's not doesn't Center up inside the
the rotor as well as it should
i've had to sand it down just a little
bit and then i'm able to tap it in a
little bit there but I think that it's
supposed to be if it's supposed to be a
tight fit but it should be able to slide
in by hand I believe then we have a
guide pin that's going to go through the
center of that then we have this outer
housing the bolts in place to hold the
guide pin in place so the blue sleeve
this one here because there's one for
the other side also centers the rotor
into this plate and then this sleeve is
centered into this plate so we've now
centered the rotor on this side of the
stator so now we need to go to the other
side to put additional tools in to get
it centered and then pull it up and out
okay at this point if I had the
transaxle mounted in that special
rotating holding fixture I would just
simply rotate it on its side and get the
get the rest of the tools hooked up but
I don't I'm not able to use that so I'm
just going to put some extra long bolts
in this side of the case to hold the
case up off of this tool when I tip it
over to support it as we pull the rotor
out
okay so here we go we're going to tip
the tip the whole thing up on its hand
just like that so now we've got
clearance for the tool underneath and we
can get the upper tools set up to pull
the rotor up and out all right while
we've got the transaxle tipped on its
side let's take this oil sump cover off
and show you what's inside of there so
it's just a big empty trough and you can
see has one two three four five six
holes in it where fluid is going to go
out and drip down on other parts inside
of the transaxle for stator cooling and
for the ball bearing lubrication the
cover itself has that same aluminum
gasket that's not reusable also while we
have this transaxle on its end let's
turn it over and take the coolant sump
off next okay here's our coolant sump
you can see this pipe right here is
where the coolant comes in and it has to
wind back and forth back and forth and
then come back out over here the coolant
sump which is visible from the bottom of
the car with the under car cover removed
also has that same aluminum gasket
that's not not reusable why are they not
reusable I don't know maybe the aluminum
crushes these I'm going to see if I can
buy replacement gaskets at the local
Chevrolet dealer it seems like I saw a
service bulletin saying that all these
parts are serviceable now and it gave
the part numbers for them but if not
none of these are damaged it only has 35
miles on it and I'll reuse them and see
what happens
okay so coolant sump oil sump so now we
are ready to pull out the rotor assembly
so to pull out the rotor assembly we
have a guide pin it's going to come in
and screw into that dowel they had a
threaded end on it all right so this
threaded guide pin did not line up
exactly perfect with the guide pin down
below I can't tell if we're just
spinning the whole thing there we go
all right it's screwed all the way into
that alignment dowel from below now we
have this tool that has three holes that
go over the holes where the stator bolts
are so we need to remove the stator
bolts next these stator bolts are not
reusable three stator bolts so we put
this tool over the top of that we want
to be very careful that we don't damage
pry lean or set anything on the stator
windings here that could cause damage to
them so we'll get that lined up just
like that now I'm going to reposition
the camera so you can see
how tall this next tool is that fits on
here all right we have two clamshell
type tools that are going to come in and
clamp down over the resolver cam rotor
there and this bearing they're gonna go
just like that except I need to split
them apart so I can get the next tool in
it says this big tall piece right here
that's going to go over and down into
our stator bolt holes so we've got this
threaded shaft we've got this adapter
right here that these little clamshell
tools are going to hook into and then
the threaded shaft with a nut on the top
of it we're going to tighten that nut
and pull the rotor up out okay so the
tricky part of giving this hooked up is
getting both of these
clamshell tools over this lip right here
so I have to loosen the nut on the top
and let it come down let me turn this
you can see what's going on
there we go okay so we slide that open
clamp the clamshells around it put this
sleeve over the top of it to lock the
clamshell in place snug up this nut to
hold the lock in place and then from the
top here we start to pull up on the
rotor itself I'm going to get
repositioned bring my chair up a little
higher here so I can reach that nut it
takes quite a bit of turning to pull
that out okay here we go thirty
millimeter wrench we want to turn the
nut and prevent the shaft from turning
so I'm just going to hang on down here
as it comes up those guide pins the
guide dowels keep it from rubbing on the
stator frame although although there's
almost a strange ratcheting sound as I'm
pulling this out that makes me think
it's barely contacting the the stator
laminations or the rotor laminations
anyway we'll pull it out and take a look
see if we can see any witness marks you
can see the top of the rotor now is
starting to appear
I think we're finally clearing the top
of the yes we are it all of a sudden got
real easy to turn the nut so we no
longer have the magnet pulling out or
resisting us pulling out okay you can
see the entire length of the rotor here
get another bearing down below it and a
gear below that now we're supposed to
just lift up on this and and pull it out
I'm not sure if I'm strong enough I may
have to bring in the the engine hoist to
pull it out of here but it's just
sitting on these three non-magnetic
aluminum poles here and we've got the
weight of the the rotor assembly itself
I measured it earlier but I can't
remember what it is at this moment but
let's see if we can lift this up and out
though I cannot so let me get the engine
hoist we have to lift it up high enough
to clear that alignment dowel so I've
got to lift it up probably four more
inches 100 millimeters or so okay I've
never tried this before it's just a lift
strap let's bring it up
okay the lifting or the tool was getting
stuck in one of the holes for the the
stator bolts there we go
okay here we go
and we've cleared the alignment dowel so
slide the case out of the way here and
we'll let that back down
oh let's see how much that weighs it
says it weighs 60 pounds with the tool
the tools probably 10 pounds of that
okay we have to remember that this rotor
is highly magnetic very strong eight
pole magnetic field around this thing
and so we need to keep it away from
anything any metal particles or any
tools or anything else that could cost
cause it to receive damage on its
laminations here in looking at the the
laminations from removing it I don't see
any obvious damage at all there let's
let this down and take the the tool off
and just look at the rotor itself
little clamshell pieces out of there
these tools are magnet earth iron some
some sorts so we got to keep those away
from the magnetic field as you can see
these blue bars are aluminum they're not
sticking to the the rotor itself and
then plastic of course works great with
the magnetic fields so now we've just
got our rotor we've got our drive gear
down here I've got a ball bearing and
another ball bearing there's another
shim down inside the case a bigger
diameter shim for this bigger diameter
bearing all right I'm going to get some
wooden blocks to put this in all right
here's the rotor for the bolt
evie as you can see this bearing seems
to have some sort of a gray coating on
the outer race where this one does not
and on the counter gear bearings they
also have this gray coating it doesn't
say anything about what that gray
coating is for I suspect it's to prevent
corrosion from the dissimilar metals
with possible induced currents going
through them with the the motor running
vehicle going down the road I've seen
this type of coating on universal joints
in universal joint caps universal joint
caps bearing caps in an aluminum
driveshaft the same color I don't know
if it's the same material but if any of
you know what this coating is for if
you'd please put that in the comments
below I'd appreciate that
I'm just speculating okay so we've got
the rotor out of the way this is a
serviceable piece now the last piece to
remove is the stator assembly itself and
it has three special guide pins that go
into the stator bolt holes and screw
into the transaxle case and then they're
tapered on the top here and that's to
allow you to slide the stator out
without it binding inside so I'll slide
that over there rotate it down and just
pull out slightly
here it comes just like that so here's
the stator for the Chevrolet bolt Eevee
if we zoom in close and look at the
stator windings you can actually see
there are 1 2 3 rows of these hairpin
conductors which means they are 6
conductors deep in this stator and from
what I read in the SAE document on this
new improved motor that helps reduce the
AC power losses at the higher motor rpm
a typical stator like in the previous
Chevrolet Volt had 2 rows instead of 3
so they were four conductors deep in the
Chevrolet Volts and six conductors deep
here and one of the people that was on
the original design team for the
Chevrolet Volt told me that when they
designed this electric motor and it's
designed for maximum efficiency and hand
power that there was no other motor out
there that could even match the
efficiency of this motor and they said
that they designed this motor to be the
next small-block Chevrolet so to say of
power trains so the small-block
Chevrolet was and still is a very
popular very powerful v8 engine and has
been for many many years and their
intent was to have this motor design
maybe even this drive unit be in
multiple platforms with the same high
power high efficiency motor system if we
look at the other side here of the
stator windings you can see the the
other end of the hairpin conductors and
then there's a drip channel right here
for oil to come out of that oil sump and
to drip down and go down and lubricate
the stator windings because these get
really hot this is the heat source
inside of the transmission and it and
although it gets hot it doesn't get as
hot as the fluid
although the fluid gets hot it doesn't
get hot as a normal planetary gearset
style automatic transmission and the
cooling system surge tank reservoir cap
was only pressurized to 5 psi for this
loop of the cooling system so much lower
amounts of heat compared to an internal
combustion engine with a torque
converter heat generating planetary
gearset style of automatic transmission
now just a couple of things to get
wrapped up with this disassembly video
because we will reassemble it showing
the special measurements for the shims
and everything when we go back together
but one thing I wanted to show you about
these electric vehicles is how simple
they are and when I mean when I say
simple I don't mean simple design
meaning it was easy to design these
simplicity is not necessarily easy but
if we look at the number of rotating
parts in this entire drive unit
there are basically three main rotating
parts we've got the rotor assembly that
then turns the counter gear right here
that then turns the final drive three
pieces no clutch packs no bands and no
sprags no roller clutches no Pistons
none of those hundreds of parts that you
would see in a typical automatic
transmission let alone the internal
combustion engine that this is replacing
of course there are three main moving
parts these pieces here but each one has
two bearings on it so there's six more
pieces so there's nine total and then
inside of the differential here we have
two side gears and two differential
pinion gears so that makes for a total
of 13 possible moving parts inside the
of this drive unit and only when you're
turning corners would the side gears in
the differentials
be rotating at a different speed than
the differential case so a real basic
very reliable system these electric
vehicles and and this one is is very
efficient and that the design is very
compact to where this left-hand output
shaft remember goes right through the
center of the rotor instead of being
offset like on the the Nissan Leaf and
other electric vehicles out there so
congratulations to Chevrolet and the
design team that came up with this
amazing and efficient and simplistic
evie drive unit and I think it's
absolutely beautiful so coming up I hope
to shoot a reassembly video with all the
measurements for this drive unit and
then we've got all of these parts out
the drive unit all of the electronics
and our and our Chevy bolt back here on
the hoist is totally empty yeah under
the under the hood so we've got to put
that all back together and and make it
work again even the battery is out the
whole thing is stripped as far as the
powertrain is concerned and we're gonna
put that back together and and make it
work and hopefully get it converted to a
DC fast charge thank you for watching
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