1995 Riviera Trans seems fine other than no overdrive. It was working great???? Is trans toast? or maybe some kind of sensor or switch? trans is fairly new

I have the same problem. You are probably going to have to rebuild the transmission. A scanner would give you a better Idea what is going on with the transmission. I am going to be rebuilding mine in a few weeks.
( god I can't wait) I will keep you informed.

DOUBLE POST....CHECK YOUR OTHER POST FOR A REPLY.

Of course the Mod had to lock the other thread because of it because I had replied to it already but here'* what I had asked.

How fast are you traveling?

I was driving normal at 65 MPH

Do you have a RPM gauge in your car, if so, what was it reading while you were driving?

Ill bet it was reading around 2500 rpm wasnt it.

Yeah 2500 ,but what'* weird is, I just drove it a couple miles down the highway and now overdrive is working again?????Is the trans getting hot and not wanting to shift? Any FWD trans tech guys on this board?Fluid does not smell burnt.

Sounds like you may have an intermittant TCC Solenoid, and it'* starting to go out.


My theory.....if it'* working now and all.

Generally with heat, it'll make it slip in OD more than just not use it at all.

Where is the TCC switch? Is it easily accessible with the pan off? I had one go out on my 87 Grand national and it was easy to change.

These ones.....not so much.....it'* in the side pan behind the driver'* wheel....a total bitch to get at.