Originally Posted by tomctx
Another way (so I've been told) is to push in clutch, rev to 4 or 5 thousand, and let it go. If one wheel spins, open diff, if both wheels spin, LSD.
Not exactly. If both wheels have the same amount of grip you wont be able to tell. It's unlikely, but just pointing out flaws.
3.23 LSD here. Ill eventually dump it so I can get like a 2.79 or something.