Diamond in the rough.

SurfDog

I have a Quaife.
Pros:
great DD (no noise or ratcheting),

low/no maintenance (do not have to replace clutch plates)

Lower operating temps.

Helps with cornering by "vectoring" torque to outside wheel.

Direct swap into the OEM (note you might need one new stub axle (call Z1)

Cons. Doesn't really lock (might actually be a pro depending on application)
Acts like open diff if you lift a wheel. Not great on ice/snow (acts much like an open diff in those conditions ie it needs some traction to function )

Z1 is great for advice. I do not recommend this as a DIY unless you've done them before.

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09 6spd Berk CBE, JWT cams, ZSpeed CSC, Stillen (25 row oil, brake cooling, sways, gen3 CAI), Passport (9500ci), Quaife LSD, Z1 400 hp kit, ss lines, pads, rotors, clutch etc, Phunk's pan and fuel starve fix