My son has just informed me that the transmission seems to be slipping in his 1993 Bonneville. (160,000 with a new engine about 1k or so ago)
Tranny fluid is new and bright red, at the appropriate levels.
Car starts fine. Shifts smoothly into drive, but when you step on the pedal, you simply get an icrease in RPM with little or no movement. Problem goes away after 5 or 10 minute warm-up.
It has been going on since the cold weather has set in. (About a month) It was 20 degrees F here today. The colder the weather, the worse the problem.
I have searched the forum trying to get more clues, but haven't found much.
Anyhelp would be greatly appreciated.