Hey everyone, new to this so bear with me.
I’ve got a 1996 5.2L 1500 with approx 300xxx on it.

The TC seems like it’s staying locked until it drops to second gear when slowing down. It drives great with overdrive off (other than constantly adjusting TV cable in hopes the O/D will work although I’ve read that it’s unrelated I’ve also heard that it is.)

The trans was just rebuilt less than 1500km ago and I had a torque converter built for 35’s and to play around with. On a somewhat unrelated note the trans shop wrote that it’s a 47re or 47rh (can’t remember off hand) but I thought that they only came with the A518 and 46re/rh series transmissions.

So far I have replaced the speed sensors on the trans, t-case, and rear differential, blown the trans cooler out, done 3 flushes, ordered a new tv cable, oil pan gasket, rocker cover gaskets, new yolks and u-joints, etc. The trans shops all said it’s doing what it’s supposed to however when I can’t drive over 80 like I could before my trans was on its way you, I disagree. I’ve cleaned the TB and made sure the sensors are functioning properly, cleaned grounds, looked for wiring problems but to no avail yet. While driving with O/D off if I turn it on it will engage and drop as it should. When I try to turn it off again it won’t unlock, until it naturally drops to second gear. I am maxing our at 2,100rpm with my foot to the floor and losing speed when going uphill.

Any ideas would be greatly appreciated or similar problems

 

Are you see your adjusting the TV cable correctly? Mine also has no power but will kick down if I press the throttle or it drops enough in speed on it's own. I've never heard of a "locked up" torque converter but I could be wrong.

 

Blown plenum, and/or clogged cat. Or some other issue that doesn't set a code. Unfortunately, there are a lot of 'em..... O2 sensor being right on the top of the list.

 

I’ve adjusted it, the dealer has, and so did the tranny shop. The cable stretched a bit I believe so I shortened it just a hair but yet to see a difference overall

 

I have been looking to go down that route and I bored out the cat. O2 sensor turned the CEL on because it isn’t fluctuating or could’ve clogged now

 

That would be the rear O2 sensor. Non-fouler trick will cure that code. (or simply clearing it, PCM shouldn't figure it out again for a while. My 96 NEVER figured it out. )

 

I’ll give that a go after giving it a quick clean. Which non-fouler trick are you referring to? And any recommendations on the plenum? I’ve read up on a couple but would prefer to just do it once

 

Any aluminum plate (I found mine on eBay) Fel-Pro gaskets . Just search O2 non fouler

 

I’ll give that a go on payday 🤘🏼

 

Thanks again everyone, really appreciate it!