installed fidaza aluminum flywheel and center force dual friction clutch also aluminum driveshaft...let the new parts brake in for 500 miles.
Took car for a rip and as i hit 4000rpm car "shuttered and large vibrations"
left under powered also...
any thoughts on what i should check ?

 

HELLLP GUYS!!!
also when at idle and rev car over 4000rpm car shutters and vibrates excessive....
any thoughts?????????

 

How did you have the flywheel balanced? Is your engine stock (externally balanced) or has it been modified?

Again... if you need tech help, its often easier for people to help you if you include basic info about the year of your car, etc. You've started two threads asking for help, and the only answers you have on any of them are from the moderators. I suspect others aren't helping because you aren't giving us enough info about the car.

 

i have a 96 ws6 trans am with stock 350 flywheel was not balanced because they stated that it was from factory

i have not done anything major on the engine except some bolt ons

 

Sounds like the flywheel isn't balanced for your setup. Still have the stock flywheel?

 

I'm running into this exact same thing on my 96' Camaro SS, I was told by the dealer that they didn't send it off to get balanced because it said in the box that it was already balanced. But it stated on the flywheel in 6 different spots that it needed to be balanced. Anyway i can come back on the dealer to get it fixed? I just put a new stage IV tranny in it, and i thought it was the tranny, but its not. Let me know, I lost a crap ton of power because of it. I also don't have the stock flywheel, what can I do about it?