Driveline vibration driving me nuts

[brian52555]

Hey Guys,

Need some help diagnosing some juddering from my driveline. It only happens when I lift off the throttle semi-abruptly, and sounds like there is some movement/shaking coming from the diff or rear part of the driveshaft.

I'm going to throw the car up on jackstands this weekend to see what it could be, but I was hoping to get some pointers on possible problem areas.

Note that I am running a ZF 6 speed with custom trans mounts, and e36M driveshaft, e30 CSB, and Z3 torsen diff. Kind of a frankenstein setup.

Sorry for posting this here, I've posted in the driveline subforum before and got zero hits. Please move if necessary.

[TurboJake]

Probably subframe bushings.

[Thizzelle]

center support bearing, if you can grab drive shaft and move up and down. Just remove heat shield and put camera up there to take pics also.

[bernzpeed]

csb, guibo or your driveshaft is bent.

[brian52555]

Subframe bushings should be good, all bushings replaced with urethane in the last year.

CSB/Guibo I will check this weekend. Thanks for the tips.

[Stanley Rockafella]

or possibly the u joints too... esp. the rear one

[mikeedler]

I would bet the CSB is a bit worn out.

[TurboJake]

Subframe bushings should be good, all bushings replaced with urethane in the last year.

CSB/Guibo I will check this weekend. Thanks for the tips.

If that is the case, then I will also say CSB and ujoints as others have.