Originally Posted by eshghehBMW
it happens in straights...
I fixed the link...it's exactly what he or she is describing...unfortunately he or she doesn't post the solution.
Yes it was me that post that initial thread, and i am a HE btw
that was the issue i had, certainly i haven't fixed since i bought another E30 and i have been tearing that one on the streets
One way to find out is lift the rear and start the car, make sure the front tires are secure, if you can do it in a shop much better, easier, than shift the car on drive and check the rear, for my car i have narrowed it down to few things listed below:
1) Emergency break pads rubbing/stuck on inside rotor, (try adjusting the pads, there is a DYI somewhere here or other e30 forums)
2) rear wheel bearings, most probable cause, not recommended to do yourself unless you have that bearing puller kit. Pricey but worth taking to bmw independent shop or somewhere who you trust and can perform the job.
3), differential. i donít know when was the last time you flushed the fluid or if that even will fix the issue.
it could also be your drive shaft, not sure though.
if the pump is going out it will do more of a whining sound.
if you start with the easier things then you can pretty much narrow it down to your source.
how many miles on your car, do you have records of maintenance if you are not the previous owner. what have you replaced so far?
let us know.