Thread: 4T65E Hard Shift-Solution

What a timely thread!! My 2000 GT recently began hard-shifting after 185,000 miles and I am looking at buying another tranny. Now I will be investigating this solution.

bsorenson, keep in mind that this issue is a pretty specific one that has to do with the pcm entering a mode where it commands full line pressure after it has detected too much slipping - or, maybe, the pressure control solenoid messes up and provides full pressure when it isn't supposed to. It operates almost on a toggle switch type of logic where the hard shifting starts, and if you shut the car down and turn it back on it goes back to being perfectly normal.

In your case with 185K on the trans you might just be seeing an actual need for a rebuild. As the clutches wear and slip more the line pressure will be increased to compensate and you'll get hard shifts.

I wouldn't necessarily say that the shift kit wouldn't help, and its not that expensive to try. So you could always give it a shot.