The salesman tells me it'a a locker. The G80 code says positraction limited slip. It drives like a limited slip, not a locker. Can anyone tell me how this works and why it's called a locker if, in fact, it's not? I have many friends with Detroits in Chevys, Fords, and Land Cruisers and I have an ARB in my Land Cruiser. Those are lockers. What is this thing in my rear diff?