4L80/85E Transmissions. 6L90 Transmission | Diesel Place

Info: Sticky GM 4L80E/4L60E Reference Material, Manuals, FAQ's/Parts List. (Updated November 2018)

1

58K

ATTENTION Sticky Your input needed for building FAQ's for tranny

2

39

54K

by Diaric

Info: Sticky 4L80E Conversion - Older Truck

2

10K

Info: Sticky The most common problem facing the 4L80-E NO OVERDRIVE and how to deal with it.

4

90K

by GenBiltstein

Info: Sticky Leaving electrical and going into Hydraulic. Repeated DTCs?

2

8K

by GenBiltstein

ATTENTION Sticky First posters new to 4L80-E/ 4l85-E Transmission forum? Read before posting.

0

14K

by GenBiltstein

1995 K2500 6.5 4L80E to NV4500 swap in progress questions

5

230

Question: 6L90e upgrade in a '96 K2500?

4

370

Question: Going on and out of limp mode

0

641

Question: 4L80e transmission from Humvee?

1

440

by kingofthirdrock

Trying to fix Code 81/82 in my 94 Chevy 3500

3

102

4L80E Limp mode, Trans fuse blowing, unable to clear DTCs 81, 82, 83

11

2K

Question: TransGo HD2 Install

1

438

by mbost

Question: 4L80e slipping/shifting issues

0

365

Is it better to upgrade to full synthetic DEX VI equivalent or stick with older DEX III

2

650

Changing axle ratios & trans shift points.

6

540

4L80E Cooling Lines Puking, best source for replacements? Also--won't shift down into 1st.

4

384

1993 6.5 4L80E DTC 68 Overdrive Ratio Error

13

5K

by Carl Brownfield

Transmission tag question

2

447

by CB1

1996 4l80e, fresh rebuild, no reverse

12

4K

4l80e shudder and surge with engine braking deceleration

0

416

by asm225

Did the transmission oil/filter change

1

411

by ForeverFalcon40

Question: 1997 4L80E in 1992 truck

6

405

Question: DTC codes

6

335

Question: 4l80E 16147609 TCM, ESS, & TPS.. or Manual Valve Body

8

827

by Contract_Pilot

4L80E Rebuild and Improvement

2 3 4

70

8K

Reverse / Downshifting from OD GRINDING / Also surges in Reverse

2

289

by oldmanriverman

Question: difference between 94 and 95 4L80E

1

375

Question: How to Adjust Passing Gear Kick-down?

18

2K

Question: Speedometer reads too fast

5

607

Slips in and out of OD

4

468

Question: Upgrades?

7

823

Transmission connector test point pin locations and what they are for.

1

9K

1992 k2500, 6.5td, semi upgraded 4l80e

3

304

by Jsamples1981

Question: 1993 6.5 4L80E TCC Unlocking

4

380

Question: 4L80 No OD codes 22 85 86

7

419

Question: 1995 to 1997 4l80e problems

4

347

by Dabbs_diesel

Tranny failing? Torque converter?

1

402

by Dabbs_diesel

4l80E No Fourth Gear/Overdrive

15

789

Delay going into 1at

0

264

by K5_489

Inappropriate UPshifts?

7

487