i have replaced the trottle senser and cam senser
Transmission shifts at approx 3000 rpm.sometimes it will not shift into overdriv on 1997 Mercury Mountaineer
seek a free diag and est from aamco
Have it checked out by a mech. before putting any MORE parts on needlessly.
Possible trans , not engine problem? Check engine light on? Fix eng. codes/systems first , then fix trans......... Agree with wetry!