E30 Zone

my e30 clonks a bit when i change gear and i feel a sort of shock threw the system. so something on my drive train is worn.... but what? where? and how easy is it too replace? and how can i work out which bit it is?

Theres a rubber guibo at the front where prop meets gearbox, this can knock, also centre bearing in uh the centre - its a bearing in a rubber mount -the rubber can go so its not holding the prop as well as it should. The diff bush could be knackered. Is the knock from the front or rear? You can check the diff bush and guibo under the car, the centre bearing has a heatshield and exhaust pipe in the way so I'd check the other two first.

Could also be your diff input shaft, or your rear suspension top mounts.

Rear brakes binding ?

i dont think the brakes are binding... infact i know they are not had it up in the air....
yea i was thinking rubber doughnut... but not sure really... sounds like its coming from further back...

Any noises coming from the diff area?

could be... it sounds like it mite be rear axle or centre joint