TRAC-LOC
The Trac-Loc is a stock replacement limited slip unit. It is fairly inexpensive and easy to rebuild. It is a clutch-type unit and will not lock up 100 percent. When one tire is off the ground it will spin freely just like an open carrier. However, if you apply a little brake pressure the unit will usually start turning the grounded wheel. This trick works because it loads the clutches and engages the unit. The Trac-Loc is a light-duty limited slip and will not hold up under extreme off-road conditions. If the unit wears out it can ussually be rebuilt. Trac=Loc units feature a one-piece case and two side gears.