hey guys i've got a 94 z28 with bolt-ons and some engine work, when i get up and around 100+ mph the car starts to shake, i think its the driveshaft but im not sure...any suggestions on what to do i'm thinking about getting an aluminum driveshaft off ebay or soemthing but i dont know if thats the problem, thanks guys

 

Does it vibrate at a certain speed or rpm? Rpm, I would say driveshaft. Speed, tire balance. Also, check to make sure your lug nuts are tight. Just my .02

 

A LS1 drive shaft cured my high speed vibration.

-Tony