Okay I got my car back from the dealer today.The overdrive is flashing because either my TCM is messed up or my main computer is not reading the TCM correctly.The guy said It's not a big deal my car ju downshifts easier.
The above problem had nothing to do with the vibrations I was asking about. It seems when my car was in the shop they drove it and hit my catalytic converter puhing it all the way up against the frame.
Anyways the guy said just to get my exhaust pulled back don and it should be fine.He also said my car runs like a raped kitten.
