4l80e

stepside

stepside

Well-Known Member
Hi
I started 4l80 transmission project
I did dual feed mod and drilled separator plate feed holes
Direct drum was broken so i replased it with cadillac t400 drum
I bought megashift controller and wiring harness
Trans is ready now but torque converter makes me a
headache
I found opel 245mm lock up torque converter and started modifying it to 4l80
Lots of machining and fitting but i get it to work
I've been really busy but i try to upload Some pictures
 
yeah! the more accurate info, and descriptions of what your doing in clear pictures the better,
if you have the opportunity to work on a transmission rebuild, posting
lots of clear detailed pictures with posted written commentary,
accurately detailing exactly whats being done, and details ,
on how and why each parts being selected,used and installed ,
would be very helpful to other members reading through this thread!
keep in mind easily 90% of the people reading the thread,
have never opened or worked on the automatic transmission internals,
nor any experience or idea what was or is required to do so!
 
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I bet that torque converter work was a project in it's self. You must have access to
a lathe and mill.

Were you just adapting the converter so it would fit and work or did you go deeper
than that?
 
I do have a lathe and horizontal mill
I just adapt converter to 4l80 trans
The converter diameter is 9,5" so i bet that stall is Some where 3000-4000rpm I try first and adjust more negative finn angle If it stall to low
I machine and weld flanges to the converter so i can bolt it open
 
love the fact your posting the pictures,
but I think it may be really helpful,
if you post a very brief description of what your doing in each picture under it,
remember many of the guys reading the thread,
have never even seen a mill, lathe or the internals of an auto transmission
or a torque converter thats been cut open.
and most guys have no idea what a mill or lathes used for or how you set up and meassure things,
why they may need to be re-machined or what your trying too acomplish,
with the modifications.
yes it will takes a bit of effort,
there ARE several suppliers of adapter tail housings for the conversion of a much stronger 4l80E transmission to the C4 corvettes C-beam support
4l80etail.jpg

but youll look like a damn genius ,
to most of the readers of the thread, simply for knowing how to work on a transmission.
if you can explain what your doing and why its being done!
to many people what goes on inside a machine shop is a magical art,
and while they may have herd terms like
line hone, or valve body or stator,impeller or check valve,
they have not a clue and could not tell a stator from an impeller or sprag
0900c1528006c024.jpg

http://www.tciauto.com/tc/trans-dim/

http://www.monstertransmission.com/4L80E-Transmission_c_3936.html

4L80E-1a.jpg

4L80E-2a.png

4L80E-3a.png

4L80E-4a.jpg

4L80E-5a.jpg

transwe1.png

transwe2.png

transwe6.gif

transwe3.png

transwe4.png

transwe5.jpg

traflul.png


Here is a list that I found posted for the trucks that use the 4L80E forChevy.

AVALANCHE 02-03 4 SP RWD/4X4 V8 8.1L 4L80E

C/K PICK-UP 1500-2500 95-99 4 SP RWD/4X4 V8 5.0L/5.7L/6.0L/7.4L/6.5L DIESEL4L80E 17 BOLT PAN

C/K PICK-UP 1500 00-03 4 SP RWD/4X4 V8 6.0L 4L80E

C/K PICK-UP 2500 00-03 4 SP RWD/4X4 V8 5.7L/6.0L/7.4L/8.1L/6.5 DIESEL4L80E

C/K PICK-UP 3500 95-03 4 SP RWD/4X4 V8 5.0L/5.7L/6.0L/7.4L/8.1L/6.5L DIESEL4L80E 17 BOLTPAN

SUBURBAN 1500-2500 95 4 SP RWD/4X4 V8 7.4L/6.5L DIESEL4L80E

SUBURBAN 1500 96-99 4 SP RWD/4X4 V8 6.5L DIESEL4L80E

SUBURBAN 2500 96-03 4 SP RWD/4X4 V8 5.7L/6.0L/7.4L/8.1L/6.5L DIESEL4L80E

TAHOE/YUKON 95-03 4 SP RWD/4X4 V8 6.0L/8.1L/6.5L DIESEL4L80E

VAN FULL SIZE 2500 96-03 4 SP RWD V6 4.3L V8 4.8L/5.7L/6.0L/8.1L 6.5L DIESEL4L80E 17 BOLT PAN

VAN FULL SIZE 3500 95-03 4 SP RWD V6 4.3L V8 4.8L/5.7L/6.0L/7.4L/8.1L/6.5L DIESEL4L80E17 BOLT PAN

gmtrt1.png

gmtrt2.png

coolerdiagram.jpg

LOOK THIS OVER
http://www.transmissioncenter.org/Auxil ... _Where.htm

http://www.transmissioncenter.net/4L60E_to_4L80E_Swap.htm

retli.png

Once you’ve determined that the transmission will fit, take a minute to read our The Right Stall story in the Tech section to learn how to choose the right torque converter for your vehicle combination.







GM Transmissions
Type 1st
Gear 2nd
Gear 3rd
Gear 4th
Gear Overall
Length
Bellhousing-to-
Transmission Length

TH-350
2.52
1.52
1.00
--
27 5/8"*
20 3/8"
TH-400 2.48 1.48 1.00 -- 28 1/4"+ 26 3/4"
TH-200-4R 2.74 1.57 1.00 0.67 27 3/4" 26 7/8"
TH-700-R4/4L60 3.06 1.62 1.00 0.70 23 3/8"# 22 3/8"#
4L60E 3.06 1.62 1.00 0.70 30 3/4" 22 3/8"
4L80E 2.48 1.48 1.00 0.75 31 1/2" 30 3/8"

*With 6" (short) tailhousing
+ With short tailhousing
# Except Corvette






Ford Transmissions
Type 1st
Gear 2nd
Gear 3rd
Gear 4th
Gear Overall
Length Bellhousing-to-
Transmission Length

C4
2.46
1.46
1.00
--
30 1/2"
20 1/4"
C6 2.46 1.46 1.00 -- 33 1/2" 22 1/2"
AOD 2.40 1.46 1.00 0.67 30 3/4" 22 1/4"
E40D 2.71 1.53 1.00 0.70 37 1/2" 29 3/8"






Chrysler Transmissions
Type 1st
Gear 2nd
Gear 3rd
Gear 4th
Gear Overall
Length Bellhousing-to-
Transmission Length

A904
2.74
1.54
1.00
--
30 1/2"
22 2/3"
A727 2.45 1.45 1.00 -- 34 3/8" 22 2/3"
A518/A618 2.45 1.45 1.00 0.69 36 7/8" 24"
A500 2.74 1.54 1.00 0.69 34 1/2" 24 1/2"


btw
http://www.chevyhardcore.com/tech-s...ction-4l80e-rebuilding-junkyard-transmission/

http://garage.grumpysperformance.com/index.php?threads/tbucket-200-4r-transmission-project.7230/

http://www.superchevy.com/how-to/tr...-transmission-swap/?cx_source=cxrecs#cxrecs_s

http://garage.grumpysperformance.co...-larger-machine-tools-like-a-mill-lathe.8340/

http://garage.grumpysperformance.com/index.php?threads/mill-and-lathe-info-you-might-need.2198/

http://www.hotrod.com/how-to/transm...rformance-guide-to-the-gm-4l80e-transmission/

http://www.monstertransmission.com/4L80E-Transmission_c_3936.html
bits of transmission swapping related info.

http://www.superchevy.com/how-to/60978-transmission-swapping-tech/

http://www.superchevy.com/how-to/46140-chevrolet-transmission-swap-guide/

http://www.maliburacing.com/transmission_swaps.html

http://www.rowand.net/Shop/Tech/AutomaticOverdriveTransmissionSwap.htm

http://chevellestuff.net/tech/automatic_trans_dimensions.htm

http://www.crankshaftcoalition.com/wiki/Talk:General_Motors_transmissions

http://www.monstertransmission.com/Tech-Info_ep_42.html

http://www.outlawstreetcars.com/forum/showthread.php?1050-GM-Automatic-Transmission-Dimensions

http://www.hemmings.com/mus/stories/2004/12/01/hmn_feature13.html

http://www.transmissioncenter.net/TransmissiomMeasurements.htm

http://www.hotrod.com/how-to/transm...rformance-guide-to-the-gm-4l80e-transmission/

http://www.tciauto.com/tc/trans-dim/

https://summitracing.custhelp.com/a...1/~/turbo-350-and-400-transmission-dimensions

http://www.crankshaftcoalition.com/wiki/General_Motors_transmissions
 
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image.jpg Here i plug center support exhaust hole , when you dual feed direct drum one center support seal ring is left out and that hole is plugged
image.jpg Here i plug 3-4 gear accumulators
image.jpg new turbine hub fitting
image.jpg here i grind hardened stator inner race image.jpg grinded 4l80 race and Opel race
image.jpg milling turbine hub bushing oil passages image.jpg bushing asembledimage.jpg leftover Parts
 

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Some progress
image.jpg Plasma cutted flanges
image.jpg Milling o-ring grove
image.jpg Flanges fitted
image.jpg Flanges welded 80amps 2,5mm esab ok48.00 rod
image.jpg New pump hub
image.jpg Hub welded
 
THANK YOU!
THATS A VERY USEFUL BIT OF INFO,
in several of the links
transtrength.png

length.png


http://www.tciauto.com/tc/trans-dim/

http://www.hotrod.com/articles/performance-guide-to-the-gm-4l80e-transmission/

http://www.hotrod.com/articles/performance-guide-to-the-gm-4l80e-transmission/
4l80e400o.png

4l80egh.png


700r4ty1.jpg


700r4ty2.jpg

tools needed to rebuild a 4l80e transmission listed in the manual

https://www.summitracing.com/parts/...MIt_zev8b92QIVULbACh0EDQEyEAQYBCABEgIOpfD_BwE

https://www.ebay.com/i/162166383733?chn=ps&dispItem=1
atsg480e.png

https://www.ebay.com/itm/TransGo-4L...ash=item3c904bd814:g:fJYAAOSwBahVb1Wt&vxp=mtr

http://www.monstertransmission.com/All-4L80E-Transmission-Parts_c_5321.html

https://transpartsonline.com/TRANS_PARTS_FILE/tpcat.php?TransPartsOnline=4L80&TransPartsType=4L80

j-8763-B case holder tool
j-38655-Holding fixture adapter used with j-8763-B
j-8001-dial indictor set
j-25025-B Dial indictor stand & guide pin set caps
j-38789 -pump removal tool
j-38358-A -forward clutch housing tool
j-38868-A -output shaft assembley remover & installer
j-21363 -lip seal protector
j-35138- universal converter end play checker
j-38729 -over run piston seal protetor
j-21368 -alignment band
j-38693 -oil pump seal installer
j-21370-10 -gauge pin
j-26700-13 -dial indicator base magnet
j-23327 clutch spring compressor
j-25018-A -A/T clutch spring compressor adapter
j-21362 -lip seal protector
j-21409 -lip seal protector
j-23093 -center support alignmet tool
j-38731 -piston seal protector set 3 pieces
j-38732 -forward clutch seal protectors
j-38733-A -direct clutch assembly remover & installer
j-38735 -center support seal installer/sizer
j-38736 -Six piece turbine shaft seal installer/sizer set
j-38737 -band apply pin checking tool. Used with J-21370-10
j-38739 -pump seal installer/sizer


http://www.drivetrain.com/parts_catalog/transmissions_automatics/gm_4l80e_illustration.html

4l80epartill.jpg
 
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image.jpg Antibalooning plate
image.jpg Milling oilpump flats
image.jpg Milling antibalooning plate
image.jpg
image.jpg
image.jpg Checking clearance
image.jpg Who quess what i' m going to make these Parts

4L80E HARDWARE TORQUE SPECIFICATIONS
GM 4L80E Transmission Torque Specs

DESCRIPTION NM FT/LB IN/LB
Solenoid to Valve Body Screw 8 - 71
Control Valve Assembly to Case Screw 11 - 97
Oil Test Hole Plug 11 - 97
Fly Wheel Housing Cover to Transmission Screw 7 - 62
Pump body to Cover Screw 24 18 -
Pump Assembly to Case Screw 24 18 -
Rear Servo Cover to Case Screw 24 18 -
Pressure control Solenoid Bracker to Valve Body 8 - 71
Parking Pawl Bracker to Case Screw 24 18 -
Accumulator Housing to Valve Body Screw 11 - 97
Fourth Clutch Screw 16 12 -
Pan to case Screw 24 18 -
Extension Housing to Case Screw 34 25 -
Manual Shaft to Detent Lever Nut 24 18 -
Speed Sensor to Case Screw 11 - 97
Case Center Support Screw 39 29 -
FlyWheel to Converter Screw 44 32 -
Transmission Case to Engine Screw 44 32 -
Cooler Pipe Connector Nut @ Case & Radiator 38 28 -
Valve Body to Case Lube Pipe 11 - 97
Engine Rear Mount to Transmission Bolt 44 32 -
Engine Rear Support Bracket to Frame Nut 44 32 -
Valve Body to Case PSM 11 - 97
Oil Pan Drain Plug 34 25 -
 
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thank you for posting the clear pictures!
I know from past questions that not one guy in a hundred has ever seen a mill in operation,
many have no experience with larger machine tools, like mills and lathes,
let alone owned or even used one so the pictures are to many guys something thats absolutely new,
and something they are totally un-used to seeing done!
Its rather obvious that you have more tooling and get to use your milling machine rather consistently, so if you have a few minutes any tips you might have on the use of a milling machine and explanations on how its used and what its designed to do would be very welcome.

I purchased this Mill about 12 years ago when I found it on sale , for about $4k, then as I'm sure your aware ,It required about $1500 in additional tooling before you can actually do anything with it.
while I'm sure you have greater experience , looking at the pictures, I learned the basic use of both a mill and lathe 47 years ago, while in college , getting my engineering training, that was of course, well before CNC and similar technology was widely available,
or as my kids will tell you back when this was a calculator
versa2a.jpg

http://www.grizzly.com/products/5-Speed ... ress/G7946
t20828.jpg


RELATED THREADS
http://garage.grumpysperformance.co...luid-chip-filter-for-my-mill.6093/#post-18813

http://garage.grumpysperformance.com/index.php?threads/mill-and-lathe-info-you-might-need.2198/

http://garage.grumpysperformance.com/index.php?threads/milling-machine-related.4231/#post-39800
 
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I haven't ever seen a Homemade Racing Torque converter.
Be interesting to see how it performs for You.
Top Racers have spent $1500-5,000 dollars for a Pro built TH 400 & Powerglide Converter for some time now.
Street guys usually won't spend over $450.
$950 Tops.
 
the more detailed info and pictures you can post, referring to precision machine work the better for every one
 
I start new machining project diy centrifugal supercharger
image.jpg
Carrett compressor and gears
I will try for the first time cast aluminum core
I post pictures
 
Last edited by a moderator:
image.jpg Balaced torque converter came back
image.jpg Converter painted
I start transmission swap asap ,i have to cut drive shaft and do Some wiring ,i write how its works and post pictures
 
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