Wonder if that is up with mine. I noticed mine would not want to go into reverse right away, but now I have lost reverse completly.

I have been have lots of shifting issues. Not wanting to leave second ever until I stop and run it up to park and go again. Not wanting to use overdrive even after it has clearly warmed up enough to shift into it. I have had it downshift out of OD while running 75mph, so you know I was already running 2-2500 RPMs, I did not accelerate or go up a hill to cause this. The area was flat and maybe a little down hill. Anyway it revved up and into the red zone and hit the rev limiter. I basically mashed on the brakes since no one was behind me, just so I didn't blow the motor up.

I will be getting at minimum a new auto tranny (under warranty from the last new one 20k ago.) Hopefully I can get up the courage to do the manual swap I have been looking into.

Good luck, that tranny has had a good hard run at life. I was told that most of them go out around 130k. I know my first one did.

 

I've checked the odometer readout for codes, and at least right now, it's not throwing any. How long would a code stay in the computer? Maybe I need to check for codes right when the tranny is acting up.

Any chance a clogging check valve could cause these problems? Or maybe just a clogged trans filter?

 

The codes should stay until you clear them. If the CEL is on the there should definatly be one. This thread is the first I have heard of the check valve issue, I will definatly be fixing that when I get my truck back, if I dont do the manual swap I have been looking at.

 

No CEL, and no codes when I checked it. I wasn't sure if it was possible to throw codes yet still not have the CEL on.

I found a decent sounding trans. shop so I'm gonna take it in and see what they say. At the very least get a fluid change and band adjustment.

 

The Valve Body can removed and the front clutch circuit can be checked with air pressure ......However there are no electronic issues that will cause a no reverse situation in the 96...So i would plan on removing and freshening up this trans..

Brian

 

Don't confuse his with mine. Mine is the 96 his is the 01.

Mines already in the shop with the trans on a bench.