changing diff mounts, guibo and center support bearing.

[Time Lord]

getting some clunking and wanted to make sure i hit up any possible weak point. am i missing anything? thank you

[pbonsalb]

How many miles do you have that you have worn out a guibo and CSB? I understand the diff mounts are a weak point, but had not read the rest were problems.

[Time Lord]

Originally Posted by pbonsalb

How many miles do you have that you have worn out a guibo and CSB? I understand the diff mounts are a weak point, but had not read the rest were problems.

i have 60k its a 6 speed. you have given me some advice already!!! maybe it is just the diff mounts. should i attack just that first or change everything out?

[tinman831]

What you should do is inspect said items and see if they actually need replacing. Try and at least localize the sound. Each of those items make a noise under different circumstances.

[pbonsalb]

If you are getting clunking, something is wrong. The only things I have read about that have gone are motor mounts and diff mounts, with diff mounts being the more likely. Check the diff mount bolts.

[coloradoe92m3]

I've had clunking from day 1 for 80k miles so Id have no clue when pathological clunking occurs!

[BPMSport]

When do you get the clunking?

[s85e90]

M clunking is normal drivetrain lash. Even the manual states it. I wouldn't start changing parts just yet.

[pbonsalb]

I assumed the OP did not have a clunking and then a clunking began. If so, I would look for a problem. If the car has clunked from Day One, that would be different.

[Time Lord]

i can hear the clunk under load when shifting at high rpm. in my e46 m3 i changed out the center support bearing and guibo and it went away. i just thought it was the same for the e90 m3.