Rear Diff Noise

[redadair]

First post here guys, I have posted many times on s14 but as we know it's not available at the moment.

I bought an 88 E30 M3 out of state, got it home about a month ago. The Diff has a bearing noise, sounds like the Pinion Bearing.

Question to everyone is has anyone had their Diff rebuilt for this reason?

My local dealer wants $1400 to rebuild the Diff, several other Indi shops have turned me down, not willing to rebuilt.

Comments

Thanks
Scott

[Cabriolet]

most likely it's just the clutch pack going bad.
"grinding sound" when turning the car right?
buy this

http://www.bimmerdiffs.com/collections/frontpage/products/188mm-differential-3-clutch-kit-40-lockup

install it yourself and then get redline gear oil for an LSD.

and then pocket the $1000

[redadair]

The sound is a Whining noise that gets louder as speed increases. No change when turning at all. A couple of shops verified the bad bearing using a stethoscope on the lift while running the car. I wish it was a simple fix.

[nickmcc92]

Try using a thicker oil 75w-140. Won't hurt to try

[agent]

PM me to discuss a rebuild.

[redadair]

Rear Diff Pinion Bearings replaced, noise problem solved :) This is the first car I have owned that has needed Diff work and it's a 70K original in perfect condition. I am still scratching my head over why the bearings went bad.