Right maybe a dumb question but had my meg250 cup on the ramps investigating a vibration after a clonk on track and suspected gearbox mount and unlike other fwd cars I've had with diffs when one wheel is spun the other side did nothing? This normal? What sort of diff do cups have? Yes mine is 100% a cup lol We now suspect a potential diff issue or fly wheel but for obvious reasons I don't want to go out and try testing the diff Thanks Matt