Had a mechanic put in a new spec stage 1 clutch. The thing chatter like no other. It feels like my transmision is going to fall out of my car. Mechanic thought he installed it wrong and took it apart and put it back together again and it still chattered. Called up spec and they said that its just normal and has to be broke in. I know clutches chatter a little bit but it shakes my whole car when i start out in 1st and in reverse. Also chatters a little bit when downshifing. Is this normal? because i am scared to even drive the car. Also got a new flywheel from napa, and installed a aluminum quadrant and firewall adjuster with the new clutch.