I am a newbie but come with what seems to be a common problem with the Grand Prix Transmission. I have 81,000 miles and purchased new from the dealership in 2005, I serviced the transmission at 62,000 miles (not a flush). About a year ago I noticed that my transmission was slipping into first, second and third gear after the transmission got heated up, about 30 minutes of driving. It does not happen everyday and if I manually shift through the gears there is no jerking or slipping into gear. Dealership said I need a new tranny at the price of $3,295 with a 3 yr 100,000 mile warranty. I emailed Pontiac about my problem hoping to get financial help, they will only help with $865. Has anyone got to the root of the problem with the transmissions in the Grand Prix. Does anyone have any suggestions on possible fixes that won't cost me over $2,000. Thanks
