~bad Vibration At 70mph (not Out Of Balance Wheels)~
 

I HAVE A 95GT AND ON THE HIGHWAY AT ABOUT 70-75MPH THE SHIFTER VIBRATES (VIOLENTLY) SOMETIMES EVEN POPPING OUT OF GEAR, I JUST HAD THE MOTOR BUILT AND JUST PUT IT BACK IN BUT I DIDNT PUT A NEW PILOT BEARING IN (THEY HOT-TANKED EVERYTHING, WOULD THAT MESS UP THE PILOT BEARING?) OR COULD IT BE THAT I DIDNT PUT MY DRIVESHAFT ON THE SAME WAY THAT I TOOK IT OFF? OR COULD IT BE THE TAILSHAFT ON MY TRANS TAKING A ****?

Get yourself and aluminum drive shaft before you damage the tranny.

Get a new pilot shaft bearing. If it is bad, you will break the throw out bearing retainer. The aulm. drive shaft is a big help also. Good luck

Could it be a bent input shaft, or flywheel loose?

Driveshaft out of balance, how do you know its not the tires?

Check your steering shaft joint

Good luck:)

thanks for the info guys but i guess i posted a little too late, I BLEW IT UP TONIGHT, i was on the highway another gt pulled up next to me and i dropped it into 3rd gear revved it up then dumped it, then BOOOOOOOOMMMMM ching, ching, ching, the tranny took a crap, something to do with 3rd gear cause when ever the parts in the trans are moving now it sounds like something is going to come through the case, second trans this has happened too. looks like im putting the blown up tremec back together, thanks anyways