Subframe Noise

Under sudden acceleration from a standstill I hear and feel a clunk in the rear end. My first and only guess so far is the subframe mounts. I'm getting these replaced soon, I just want to make sure that's what's causing the clunk.

Do you feel the clunk when you decelerate quickly from speed ? If you do, then its the rear differential, that has developed too much free play.

Originally Posted by Costa

Under sudden acceleration from a standstill I hear and feel a clunk in the rear end. My first and only guess so far is the subframe mounts. I'm getting these replaced soon, I just want to make sure that's what's causing the clunk.

Subframe mounts don't really cause clunking, if it's 100% in the rear it's your diff mounts or the part where diff mounts to flange I forgot what's it's called but its responsible for major clunking when worn especially when doing downshifting.

Your best bet is to inspect it.

Thanks for your posts guys, I am starting to believe it is the diff. I'm getting the gear oil changed on the 7th of November and during that time I'm going to try and replace all worn driveline pieces. I'll update this thread when I'm doing the work. (hopefully with photos)

Could be slip joint on drive shaft?

I have no idea yet, just gathering ideas. It's to the point where it starting to annoy me a lot when I'm accelerating from a stop

It may be subframe mounts http://www.bmwe34.net/E34main/Mainte...ameBushing.htm