Yukon YGLM35-

A Yukon Grizzly Locker will give your Jeep equal power to both rear wheels when engaged. If conditions on the road or trail allow one of your wheels to slip, the Grizzly locker will engage and send 100% of the power to both sides, unlike a posi-traction unit which will only split the power going to either wheel. They will automatically disengage once it is sensed that conditions have improved. This means you can concentrate on whats in front of you and not have to worry about switches, pinched air lines or broken electrical lines. Yukon Lockers are assembled in the USA using the highest quality parts and alloy materials to handle the harshest conditions that you can get your Jeep into.