hi help on changing gear some audible knocking i have just checked the rubber around the gearbox mounting and it feels intact but i can rotate the rubber washer without any contact between the metals on top or bottom should this be tight i would have thought so for it to work as a dampner for the gearbox if so is it just a matter of tightening the nut on top until it becomes tighter but can this nut become loose and drop the gearbox slighty therefore giving me this knocking noise:bang: