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

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

1

57K

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

2

39

53K

by Diaric

Info: Sticky 4L80E Conversion - Older Truck

2

9K

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

4

85K

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

13K

by GenBiltstein

Changing axle ratios & trans shift points.

6

289

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

4

109

1993 6.5 4L80E DTC 68 Overdrive Ratio Error

13

4K

by Carl Brownfield

Transmission tag question

2

261

by CB1

1996 4l80e, fresh rebuild, no reverse

12

3K

4l80e shudder and surge with engine braking deceleration

0

193

by asm225

Did the transmission oil/filter change

1

285

by ForeverFalcon40

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

8

591

Question: 1997 4L80E in 1992 truck

6

208

Question: DTC codes

6

199

Question: 4l80E tcc solenoid stuck

1

170

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

8

474

by Contract_Pilot

4L80E Rebuild and Improvement

2 3 4

70

7K

Reverse / Downshifting from OD GRINDING / Also surges in Reverse

2

199

by oldmanriverman

Question: difference between 94 and 95 4L80E

1

233

Question: How to Adjust Passing Gear Kick-down?

18

1K

Question: Speedometer reads too fast

5

429

Slips in and out of OD

4

348

Question: Upgrades?

7

639

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

1

9K

1992 k2500, 6.5td, semi upgraded 4l80e

3

198

by Jsamples1981

Question: 1993 6.5 4L80E TCC Unlocking

4

250

Question: 4L80 No OD codes 22 85 86

7

326

Question: 1995 to 1997 4l80e problems

4

241

by Dabbs_diesel

Tranny failing? Torque converter?

1

259

by Dabbs_diesel

4l80E No Fourth Gear/Overdrive

15

539

Delay going into 1at

0

174

by K5_489

Inappropriate UPshifts?

7

377

Question: 4l80e towing and speed limiter

3

255

by v3gl

6

251

by Mr Mac

4l80e binds in first and kicks out of o.d.

4

902

Tranny slams into gears (first time diving into trannies!)

2

284

by K2500_Sub496

Temp sensor oddity

3

210

Question: 4L80E acting wierd after repair.

5

295

4l80e rebuild failure

9

319

by kerrye