Today I replaced the gearbox mount which made no difference to the vibration so Ive checked all the plugs, dissy etc, inside the dissy theres a copper wire coil with a fabric around it, this fabric is broken so probably not a good thing? Also when engine is off the viscous fan I can spin but not smooth then it gets jammed using force to release it, I can shake fan blades left and right about half inch could this be the problem with vibration??