I brought my 05 Grand Prix (automatic) to a reputable transmission shop in my area about a month back after my tranny began to "clunk" only when up shifting, coupled with having to press the accelerator down farther and uneven acceleration. It would happen once every week or two, less often now, but when I brought it to the tranny shop, the owner said it was most likely an electronics problem (he named a chip of sorts but I can't remember what he called it) that was common in this tranny; wasn't worth the money to replace as it doesn't damage anything (not sure if I should believe him on that).
Does anyone know what this chip is or what's causing the problem and how much I would pay to fix it? Or even better if I could do it myself. I'm planning on upgrading the differential and such soon to have a "mock" HD tranny, along with a shift kit so I can perform a top swap next year and I don't want that problem pooping up again and doing god knows what to my clutch.
Edit: With a little research I also stumbled across a thing called a pressure control solenoid, not sure if that's what he meant, never used the words pressure or solenoid but maybe he was dumbing it down for me...
)
