4l80e trans.had no overdrive,replaced unit with reman. same problem

have you told any of the tranny places of problem when they were replacing or working on vehicle ---has the tcm been tested ---and scan for any trouble codes

Any fault codes showing in memory when you read the codes.

Automatic trans having overdrive issues - Diesel Bombers

www.dieselbombers.com > ... > 12 Valve 2nd Gen Dodge Cummins 94-98

Apr 22, 2011 - '96 dodge 2500 transmission is having trouble staying in overdrive. ... Hetold me it could be the Throttle Position Sensor, the computer needs ... Oh and another thing, The brake safety for shifting out of park is .... 95 chevy 3500 6.5l trans issues, drgracen, Chevy/GMC 6.2L and 6.5L, 1, 10-05-2015 10:13 PM.


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The most ridiculous Overdrive questions - Diesel Place : Chevrole

I'm afraid if you have not changed the trans fluid
every 3 years since the vehicle was new, on all your
vehicles,power steering as well,you will have to pull
it & rebuild it

is it a 4l80e electronic shift transmission....it may be an issue with the solenoid pack...you can take it to someone who has a scanner tool for the trans...if it is indeed a 4l80e

I think rebuild try and service it if you find any lining material in the pan bad news

good luck should be able to swap shaft but what about the switches inside the trans let me know how it goes

How would trans. fluid get into the wire harness?

Bad transmission, that's not a good answer. Bring it to the shop [so we can guess around], not a good answer either.

A good mecahanic will respond with something about the solenoids.

I have repaired the 4L80E on my tow truck, I have to do that almost every year, the last time it ran perfectly but when I push the pedal to the metal, it shifted from 3rd gear to 2nd and stays on 2nd gear until I turn the ignition off and start again.

The transmission was totally rebuilded so the answer "Time to rebuilt the transmission" is not acceptable.

I took it back to the shop and the mechanic replaced both solenoids A and B, that was the only thing that hasnt been replaced before, it was just a guess but works

So, I am not a mechanic but my sugestion is to replace the two speed sensors and solenoids before you take the tranny out of the car and be carefull who are you taking the transmission to because guessing is not always the best course of action

The two speed sensors are easy to replace, the solenoids are inside of the valve body but you may be able to replace them without removing the transmission from the truck

the gas tranny should work. gm was pretty good about keeping the same bolt pattern.