Whatshould I use to flush out my diff

[ducman]

I have my P/F E30 320i diff out and the cover off. The oil was very black and has left a lot of residue inside the case. Is there a solvent I can flush out the case with that won't damage any seals or bearings?

[u3b3rg33k]

brakleen should be fine, so long as you don't try to run the diff with just brakleen in it... or you could take a paper towel and some elbow grease to it.

[ducman]

I considered elbow grease but there's all sorts of gears and crap in there!

[MR 325]

Use a can or two of brake cleaner.