Hello everyone, I'm having problems with my 1999 Pontiac trans am automatic transmission. It began as just slipping in reverse until it gets warm. It progressed onto the 1st and 2nd gears slipping. I first thought that the fluid and filter was the problem until the problem progressed. The car only have a 122,000 miles on it and only sits other than cranking and moving to keep from getting flat spots in the tires. Have anyone had this problem?