Whoa....is yours a 5 or 6 cylinder?

 

It's a 2000 Volvo S80 T6 twin turbo 2.8
It has the GM transmission.
why do you ask, any thoughts? I just want to take care of throttle body first before jumping into the transmission , as I have read that a bad TPS can cause transmission shifting issues . I'll try to make a video this weekend showing the symptoms.
Again thank you for all your help and advice.

 

That transmission has no easy quick fixes. The 5-cylinder model with that AW55/50 is very serviceable.

A complete rebuild is all that you can do.

 

The throttle body rebuild needs to be done anyway ,the driveability sucks . And it will be one more thing to check off the list.
p.s. how do I upload a video clip?
Thank you again for your help

 

I had mine rebuilt by local transmission ship at 60,000 miles. Has been working well, now I have 180,000 miles. Transmission oil change every 60,000 miles since then. GM recommends oil change every 50,000 for severe service for this transmission. I think using this transmission in S80 T6 qualifies for severe service.

Triple Edge Performance Volvo T6 Transmissions

 

Just wanted to give everyone a update , I replaced the throttle body a few days ago and it seemed to help with the shifting . I don't have to put it in manual mode anymore. And overall performance is great no more launching or stalling. Thank you everyone for your help.

 

I nursed one along like you for a while. It`s dying and is on life support now. I had that same solenoid code. It comes on as a result of clutch pack issues. The solenoid was fine in mine and wasn`t replaced during the rebuild

 

All this time it was a bad or shorted out brake pedal position sensor (the one that goes into the brake booster) I disconnected it after doing some research and Bam the car is performing great. I did a lot of driving between yesterday and today and the car has never performed like this. I might have had a unique situation here.So should I replace the sensor or just leave it disconnected?

P.s. car dealer confirmed that the transmission was replaced while he had it came from a car with only 50,000 miles on it.

 

Logic would say leave it alone and it probably should be. However, if it were mine I couldn`t resist the temptation to connect the sensor back up and see what happens. Obviously, I am bad at listening to my own advice.

 

Strange how these cars freak out when a sensor goes bad and screws up the whole network.
I wonder if this has happened to anyone else.
Hopefully there wasn't much damage done driving it like it was for the past 8 months before realizing what the problem was.

 

Welcome to the new reality of automotive engineering.

 

Wow , I really am happy that I didn't have the transmission replaced or rebuilt.
A week later the car is still driving and performing great. I'm still getting used to it , driving for 9 months trying to be careful not to stress the transmission too much. And after unplugging the that sensor bam its like the whole car wakes up.
​​​​​​ It still every once in a while does get confused , but nowhere as bad as before. I've put over 500 miles on it in the past week . I think I'll do one more fluid change and should be set for awhile. Thank you for all your help.