Selling a stock 3.45:1 diff from my 1998 318ti Sport. Has about 140k and has had Redline fluid for at least the last 80k miles. Great condition with no noise, and there's no rust since it's from a California car. Bushing is in average condition, but you might as well replace it since it's out.
It is unlimited slip, meaning that it doesn't restrict wheelspin and allows the engine to put all of its power down at anytime, instead of those silly limited slip diffs.
(If you didn't get that, it's also known as an open diff.)
Price is $100 or best offer, located in the San Francisco area.
Thanks,
Fred