The Currie RockJock 60 rearend has 5.38 gears and an Eaton Detroit Locker. The RockJock comes with a track bar bracket that allows easy adjustment and mounting for the track bar. On a lifted JK, the higher the track bar can be mounted above the axle the better. Bilstein gas shock absorbers provide firm, but supple control. The rearend was moved back to stretch the wheelbase of the two-door JK 4 inches. Currie front lower control arms were used as rear lower control arms. Burnsville fabricated a single upper torque arm.