my car was using a centerforce dual friction clutch and a stillen aluminum flywheel. after a while the clutch wore off so i bought me an ACT Street disck and after installing it on the same flywheel the car vibrates whenever i move the car at low speed n try to balance with the clutch, but as soon as the car moves everything becomes normal even when i gear ****. when i down shift at very high speed it vibrates again. can anybody tell me what might b wrong.

 

maybe the centerforce wore into the flywheel, consider getting the fly wheel re-surfaced maybe

 

How new is the clutch....it might still need to be broken in....I just got a new clutch also (last week) and I get something similar although not severe...and I had the flywheel resurfaced when new clutch was put in...so it could just be that....oh...and mine does not happen all the time!