My car has 149K on it. I have a unusual situation. After i reset the computer by disconnecting the battery overnight the car shifts really smooth for 2 or 3 days but then starts shifting rough. Also if i turn the heat or ac on it makes the auto transmission shift roughly quicker. I also think it helps a little if i have a full tank as oposed to an almost empty one...

Any help is greatly apreciated....

 

bump

 

those v6 trannys are known for problems. keep looking youll find something