I have a 2002 Grand prix 3.8 (non-super charged) and currently when pressing on the accelerator i am hearing a squeak that seems louder when I open up my passenger's side window rather than my driver's side window. I do currently have transmission issues: I had the transmission fluid changed and because I followed the book and did it 50,000 miles apart and through the new high pressure way, my transmission slips after that car gets warmed up. My mechanic said that the only fix there is to replace the whole thing and that I might as well drive the car until the problem starts to progress, which right now it is staying pretty true to what the problem was at the beginning.

My question is whether the squeak is coming from the current problem in the transmission or if it something completely different. I am about to get my oil changed and so I will be told by them a thousand things that I should fix I'm sure, but I am hoping to get experienced opinions from you guys.

Also, if you have questions, I am going to try to check the responses as often as I can. I would also enjoy prospective prices if and when I decide to have the car fixed. Thanks.