This is a factory toyota V6 4:88 LSD.
I used the oil that's recommended in the manual, and made sure it said "recommended for LS".
It was a crappy oil...?
Oh, one more thing. When I got this thing in the mail, shipped from GA - it had GLASS pieces inside. Tiny little pieces of glass, like someone in their shop broke a lightbulb above the diff.
Tiny glass enough to mess with thick metal gears?
And the sound is hard to describe. It's like the leafsprings are being pinched and moved, or the body is rubbing hard on something, but not the same CLUNK you get when your tranny goes out. Although I think I would definately consider it a CLUNK...