have an 04 gmc with a 1000 285,000 miles
problem is when down shifting sometimes it will start free wheeling
just change interal and external filter and put in TRANSYND fluid and still doing it, any ideas whats going on
So far you have givin us nothing as far as info and you expect diagnosis. Sit down and write everything pertaining to your truck and leave nothing out. Maybe then we can have an idea to help. So far you look like a one hit wonder looking for help and when you get it you leave. Tired of you guys. Good luck with your problem.