Welcome to the world of the MTX75 tranny!!! I posted this same issue last week and was told by Terry Haines that it is most likely bad synchros and as the post above explains, not an easy fix!! He recommended changing the tranny fluid and adding the friction supplement. Otherwise, just shift it slowly into 3rd gear. Mine does it no matter what speed I shift it at, unless I shift it slowly. As for this friction supplement, where can I get it? Just any old ford dealer?
