I have a 94 mustang gt 5 speed that is vibrating after 65 mpg. I just replaced the whole rear end, and I am still getting vibration. The U Joints seem to be fine, BUT the other day I checked the output shaft on the transmission and there is a little bit of play there, as in I can move it side to side about an eigth of an inch. I am assuming that there should be absolutely no play there. Is it safe to say that that is the source of my problems?

 

are you sure it's not a wheel out of balance??? that is usualy the speed it's felt at...

 

Im thinking i should get that checked out first. Do you still think it is pretty abnormal have any play at the output shaft of my transmission?

 

there will be a little movement, but the tailshaft bushing may be worn... the trans mount ok????

 

That's the other issue. One of thetwo bolts that holds the transmission mount to the crossmember is snapped off, but it hasbeen like that for years. The vibration has only been happeningfor a few thousand miles. Therubber transmission mount itself still looks fine.

 

negative. you should have 0 play in the tranny output shaft. rebuild.

 

a friend of mine just ran into the same problem last week at the track he thought his trans was on the way out turned out it was the transmount and tailshaft bushing.

 

Does the transmission need to be torn out to replace the bushing?

 

just realized you have a t5... may not have a bushing i was thinking auto