My car shakes/vibrates when I am driving down the road. It does not seem to do it all of the time. So I am guessing that it isn't a wheel balance. Does anyone have any ideas to why it would do this. It is a 92 Z with the 305 TPI.

 

Tribe..need a bit more info. Start with a process of elimination and then go from there...could be tires out of balance..or a bad tire...driveshaft..just to name a few. later