Dana 60 axle swaps can be an expensive trial and error adventure for maintaining brake performance. Master cylinder and booster problems often arise when mixing new calipers, proportioning valves, etc. The Currie RockJock eliminates any and all braking hassles by offering the advantage of keeping the Jeep brakes. All four of the JK calipers are used on the RockJocks. Here, the rear backing plates are swapped over from the Dana 44 onto the 35-spline RockJock axle shafts.