> What the heck kinda lube are you all using back there? I
> have 188k on the diff on my 1987 325iS and it groans on slow
> tight turns, but that's a good thing (good lockup). You
> should have seen the crap that came out of the diff right
> after I bought it (at 181k miles). I have flushed it
> out and now run Redline 75w-90 gear oil. If you want > more slip, get the GM limited slip additive and try a bit
> of that until the noises go away.