I put a new act clutch with my flywheel resurfaced in december. the clutch grabs harder now then when it was new but it chatters at the end of engagement. shakes the piss out of my car but above 2 grand starts are smooth but anything else chatters to beat ol hell. this makes my car a bitch to drive in the city. Nissan dealers said maybe motor mounts since the clutch is 70% over stock and it is bloody new.