I have a 95 Cutlass Supreme with the 3.1L that I just bought for the winter... Has 142,000 miles but is clean and runs pretty good... Only problem is with the tranny I believe... At about 50-55mph just driving on the highway, the rpm's are around 1800-2000, but out of nowhere they will just jump up to 3000 rpm's??? The tranny shifts really well all the way through the 4 gears, but it's like it can't hold it's O/D position... Is this the gearing itself or is the torque converter slipping? What does this sound like to everyone here? Thanks in advance
Mark
