Chatter when slow speen turns?Lsd fluid?

[96Formula6spd]

So after being off the road for about 10 years my e30 had to make a jump to dd status. Anyways in low speed corners like in a parking lot some thing is chattering and making noise in the back. I am thinking maybe the diff fluid friction modifier is toast. Anything else you guys would check out. I will do the fluid change right away for good measure. I did open the fill plug and the fluid looked ok and it leaked out some. So its not empty.

[Wanganstyle]

sounds like subframe bushings are worn or the rear CV's need to be re-packed with fresh grease.

you don't need friction modifier in these units for them to be quiet; it might chatter when brand new 0 miles but not if its an original unit.

[dwight]

Axles need attention..