Andy the dule mass flywheel cuts down on engine vibration that feeds back into the transmission ie makes your ride quiet the down side is it can not be machined so when it wears down it needs to be replaced, Solid fly wheel can be machined so dosnt need to be replaced when you change your clutch over. I'm currenlt having this probelm and need to replace my clutch has anyone done the duel mass to solid replacement? and what sort of gear chatter can I expect ?