From their website, it looks like the design that's been around since the early 1960's or before- - - -a spring loaded clutch pack that applies anytime there's a noticeable difference in axle rotation speed, indicating wheel spin. It's one of three common designs- - - -friction clutches, cone clutches, and positive locking devices such as the Detroit Locker that actually locks the axles together mechanically. You'll have to learn a new driving style, as once the lockup happens, the vehicle will go wherever the rear wheels are pointed- - - -like off the road to the outside of a turn if you apply enough throttle to activate the locker. They're handy in mud or snow, as long as you adapt your driving style to the altered handling characteristics.
Jerry
