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GM Transmissions
4L80/85E Transmissions. 6L90 Transmission
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Sticky
GM 4L80E/4L60E Reference Material, Manuals, FAQ's/Parts List. (Updated November 2018)
knkreb
Feb 10, 2008
Locked
1
59K
Apr 12, 2015
by
Freddyack
ATTENTION
Sticky
Your input needed for building FAQ's for tranny
knkreb
Feb 10, 2008
2
39
56K
Mar 23, 2015
by
Diaric
R
Info:
Sticky
4L80E Conversion - Older Truck
RD Durham
Feb 13, 2015
2
10K
Feb 14, 2015
by
RD Durham
Info:
Sticky
The most common problem facing the 4L80-E NO OVERDRIVE and how to deal with it.
GenBiltstein
Aug 29, 2009
Locked
4
92K
Jul 27, 2011
by
GenBiltstein
Info:
Sticky
Leaving electrical and going into Hydraulic. Repeated DTCs?
GenBiltstein
Feb 11, 2010
Locked
2
9K
Feb 11, 2010
by
GenBiltstein
ATTENTION
Sticky
First posters new to 4L80-E/ 4l85-E Transmission forum? Read before posting.
GenBiltstein
Feb 10, 2010
Locked
0
14K
Feb 10, 2010
by
GenBiltstein
Question:
94y GMC SUBURBAN 4L80E 2nd gear no engine brake
Roy2500HD
1 mo ago
6
313
13 d ago
by
OkDually
B
Losing TCC Lockup
blackbear98
16 d ago
4
111
16 d ago
by
dieselolds
4L80E limp mode
jjervahjr
2 mo ago
9
947
2 mo ago
by
jjervahjr
R
Tranny Code cross reference... someone please answer -I'm going nuts!
rossww
Sep 28, 2010
9
4K
3 mo ago
by
GHOST
1995 K2500 6.5 4L80E to NV4500 swap in progress questions
primo382
4 mo ago
5
510
4 mo ago
by
Glagulator
S
Question:
6L90e upgrade in a '96 K2500?
sblair
4 mo ago
4
465
4 mo ago
by
johnH123
A
Question:
Going on and out of limp mode
AnnMarre
4 mo ago
0
677
4 mo ago
by
AnnMarre
S
Question:
4L80e transmission from Humvee?
sblair
4 mo ago
1
484
4 mo ago
by
kingofthirdrock
P
Trying to fix Code 81/82 in my 94 Chevy 3500
PEIslanderc
5 mo ago
3
192
5 mo ago
by
PEIslanderc
4L80E Limp mode, Trans fuse blowing, unable to clear DTCs 81, 82, 83
redshift9
Oct 28, 2019
11
2K
5 mo ago
by
PEIslanderc
M
Question:
TransGo HD2 Install
mbost
7 mo ago
1
489
7 mo ago
by
mbost
S
Question:
4L80e slipping/shifting issues
snarl2004
7 mo ago
0
496
7 mo ago
by
snarl2004
N
Is it better to upgrade to full synthetic DEX VI equivalent or stick with older DEX III
navyhoosier
9 mo ago
2
712
9 mo ago
by
OkDually
Changing axle ratios & trans shift points.
DieselPro
11 mo ago
6
668
10 mo ago
by
Tranzman57
4L80E Cooling Lines Puking, best source for replacements? Also--won't shift down into 1st.
Kgw51gmc
10 mo ago
4
449
10 mo ago
by
Kgw51gmc
A
1993 6.5 4L80E DTC 68 Overdrive Ratio Error
ArCticW0lf77
Dec 18, 2013
13
5K
10 mo ago
by
Carl Brownfield
Transmission tag question
CB1
Feb 11, 2020
2
495
11 mo ago
by
CB1
H
1996 4l80e, fresh rebuild, no reverse
Heathmzwahlen
Apr 23, 2017
12
4K
11 mo ago
by
dieselolds
4l80e shudder and surge with engine braking deceleration
asm225
11 mo ago
0
483
11 mo ago
by
asm225
D
Did the transmission oil/filter change
davester
Sep 16, 2019
1
485
Feb 10, 2020
by
ForeverFalcon40
K
Question:
1997 4L80E in 1992 truck
KUSCHEL
Jan 27, 2020
6
457
Feb 4, 2020
by
KUSCHEL
3
Question:
DTC codes
3strikes
Jan 23, 2020
6
401
Feb 1, 2020
by
3strikes
C
Question:
4l80E 16147609 TCM, ESS, & TPS.. or Manual Valve Body
Contract_Pilot
Jun 22, 2019
8
1K
Jan 5, 2020
by
Contract_Pilot
4L80E Rebuild and Improvement
paleyjim
Nov 4, 2016
2
3
4
70
8K
Dec 12, 2019
by
paleyjim
O
Reverse / Downshifting from OD GRINDING / Also surges in Reverse
oldmanriverman
Nov 24, 2019
2
318
Nov 24, 2019
by
oldmanriverman
Question:
difference between 94 and 95 4L80E
detroitMachine
Nov 22, 2019
1
500
Nov 22, 2019
by
Glagulator
S
Question:
How to Adjust Passing Gear Kick-down?
Still Bill
Feb 5, 2019
18
2K
Nov 13, 2019
by
Still Bill
G
Question:
Speedometer reads too fast
Gts2fast4u
Apr 30, 2019
5
694
Oct 28, 2019
by
Gts2fast4u
G
Slips in and out of OD
Goose57
Sep 27, 2019
4
554
Oct 21, 2019
by
Goose57
S
Question:
Upgrades?
SplitSsss
May 22, 2018
7
876
Oct 21, 2019
by
johnH123
Transmission connector test point pin locations and what they are for.
GenBiltstein
Apr 23, 2010
1
10K
Oct 21, 2019
by
redshift9
1992 k2500, 6.5td, semi upgraded 4l80e
Jsamples1981
Oct 18, 2019
3
336
Oct 18, 2019
by
Jsamples1981
H
Question:
1993 6.5 4L80E TCC Unlocking
hoho1980
Oct 4, 2019
4
419
Oct 8, 2019
by
Glagulator
Question:
4L80 No OD codes 22 85 86
56chevy
Aug 14, 2019
7
492
Sep 14, 2019
by
OkDually
D
Question:
1995 to 1997 4l80e problems
Dabbs_diesel
Sep 10, 2019
4
418
Sep 11, 2019
by
Dabbs_diesel
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4L80/85E Transmissions. 6L90 Transmission
Discuss the 4L80/85E transmissions found in the 6.2/6.5L equipped vehicles and Duramax equipped vans. 6L90 discussion.
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