I just got done installing a Spec stage III and aluminum flywheel in my car and the thing rattles like crazy. When the car is just sitting there idling the shifter rattles back and forth while it chatters. The clutch pedal doesn't chatter though which is somewhat surprising to me. When I got the flywheel it had 2 weights; one of the weights was alrerady attached and there was an extra weight in a bag. I kept the one on the flywheel that it came with, not sure if this matters. I did everything by the books, so any ideas on what it could be?