I posted this in the troubleshooting section and continue to still have the same problems after fliud level top up ect. Here is copy of original post::
95 Mystique v6 engine, Automatic. This only started today on two 1hr driving trips. Seems like after driving on hiway for 30-40 mins at 120KM the rpms went up and like the tranny lost its gear position and came out of gear...backed off on the gas and it settled a bit, but still something not right...it shifted kind of harsh and seemed to go in and out of gear. It did the exact same thing coming home after sitting for 4-5 hrs. The first part of the trip home on the hiway it was running fine and driving at 120KM...then about 40mins into the drive it starts acting up and RPMS going up like and tranny acting strange chugging like...limped it home and coming off the hiway it shifts fairly quick and rough. Could this be the range sensor gone on it? I have replaced the TSS and flushed the fluid from tranny less than 5k ago. It almost seems electrical or a heat issue. Its not plugs or wires or anyhting like that I know for sure...cause they are all new...and this problem just started out of nowhere.Just seemed that when it warmed up after 30-40 mins of driving the rpm would go right up and it would like come out of gear...OD I pressume because it was on the hiway...but like I said even when I got off the hiway it was not shifting smooth and proper. Any clues what to look for or where to start? No codes of check lights at all.
