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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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Old 03-16-2017, 01:44 PM   #1 (permalink)
sindremakestad
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Stuck in 2nd gear 4l80e g30 van

1. State model, year of vehicle and mileage:
1992 Chevrolet G30 Gladiator Van i think it has a 4l80e

2. How long did you own the truck? Recent purchase?
Me and some friends have owned it for about 7 months but have not used it alot.

3. Any service engine light: yes/no. Intermittant check engine light?
This is called CEL or MIL
Yes i believe it is on all the time.

4. Fluid level okay with the engine and transmission warm? Check on
a level surface?
Yes

5. Have you retrieved Codes? AKA DTCs Diagnostic Trouble codes.
I get DTCS 81-82-72.

6. Fluid color and smell? Red or Brown does the fluid smell burnt?
Red does not smell burnt.

7. Speedometer reading correctly at the appropriate speed? Are the tires the within OEM specifications and size? Use your GPS and verify speed. electronic transmissions remember?
It works but have not verified that it is reading correctly.

8. Is the transmission shifting normal? Is it shifting hard? Do recall the shifting symptoms or any shifting changes before or after the check engine light or after you retrieved codes.
Stuck in 2nd gear .. limp mode i guess

9. Did you or anyone else conduct any kind of maintenance to the vehicle recently?
Previous owners had changed transmission filter and fluid. in 2015 sometime i believe, the car had been parked for about 2 years when we bought it.

10. Can you explain the type of driving? Heavy towing? Snowplowing?
Cruising with no load.

11. Typical weather. Arizona hot mild winters? Minnessota cold. Please explain.
Norway cold. around 5 degrees celsius now max 25 degrees celsius in summr.

10. Any problems with driver commanded/selected shifting into any gear?
ie.. 1st, 2nd, 3rd, 4th, Rev?
Reverse parking and neutral works fine but only 2nd gear forward.


8. Describe symptoms: Does the transmission refuse to shift in first? Will it shift into second and just stay in second gear?
Yes just stays in second gear.

8a. TCC Locking? Is the transmission slipping in any gear?

No
8b. Is the transmission shifting into all FWD gears? At the
normal RPMs while the shift selector is in drive? Is it shifting later
than usual?
No not shifting


Can your vehicle shift into all gears?
If you have a tachometer can you "notice" all forward gears shifting if you are not sure if the transmission is shifting?

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Old 03-16-2017, 01:46 PM   #2 (permalink)
sindremakestad
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Forgot mileage, mileage is 200k miles. I have noticed the ground from transmission to engine looks bad. could this be a problems, is the solenoids grounded in transmssion or are they ground switched?

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Old 03-18-2017, 05:37 PM   #3 (permalink)
sindremakestad
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??
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Old 03-20-2017, 03:19 PM   #4 (permalink)
GenBiltstein
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First off go ahead and research the stickies, you should be able to get a good start there. I would research as to what type transmission you have before you go any further.
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