Re: High RPM shifting problems
I hurt the 2nd synchro about my 10th trip down the dragstrip in my 06... was like hitting a brick wall when trying to grab 2nd at over 4k, even started locking out in everyday driving... put up with it for about a year, stayed away from the track as knew it wasnt gonna get me home if I beat on it much more...on advice from a guy on one of the mustang forums, drained the tranny and refilled with royal purple synchromax- figured worth a shot before pulling the tranny.
immediately tranny felt completely different, would literally fall into third...within a hour of driving, the second gear issue completely went away, had been 1/3~1/2 of the time it would not get into 2nd first try just driving to work... probably another 60-80 trips down the track banging 2nd at 6k, only twice had a slight grind or catch when grabbing second...
never been a believer in magic oils, but the old 5 speeds sure like that RP oil! its kinda pricey for oil, but compared to a teardown, might be worth considering. No exaggeration, it made my hurt tranny BETTER than new at high rpm shifting, AND somehow hid whatever damage I'd done to it- good stuff.