I have a very bad vibration in my car. it is so bad that the rear view mirror is about to come off. It starts about 1500RPM and gets worse as I rev the engine. It does it while the trans is in nuetral so it has to be something between the balencer and input shaft of the tranny right? I just out a NEW SPEC stage 3 clutch in and it seems to have gotten worse. the engine is a 383 stroker that Ijust had built and the rotating assembly is internally balenced from Eagle. I also have a NEW 8: balencer on it. the only used part of this if the SLP flywheel. My question is what are the odds of a flywheel being really out of balence. is there a certain number of times that a flywheel can be turned before its no good. Can a crappy resurface job cause this? Can a have tis flywheel checked for balence?

 

Yes you can have the flywheel balanced. That sounds like what your problem might be. Although if it changed after putting a different clutch on it, I'd have the clutch checked too; have the flywheel balanced, then the clutch balanced, separately.

Also, make sure you use real clutch bolts; not generic bolts of whatever grade. Actual clutch bolts have a section between teh threads and the head that fits tight in the clutch and the flywheel, to "dowel pin" the clutch exactly centered on the flywheel.

There's no limit to the "number of times" a flywheel can be turned; there is however a lower limit to its thickness. Flywheels are made with a bevel around the outer edge; if that bevel is gone after turning, it's no good.