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All lifted trucks typically experience "axle wrap", a basic torque transfer from the rear driveshaft to the rear axle that warps the springs under load. Most prominent in vehicles that have tall spacer blocks between the rear axle and spring, the transfer of torque (especially high horsepower/torque engines) causes the axle pinion to rotate updward/downward under load, resulting in wheel hop and loss of traction. This do-it-yourself kit comes with everything needed to weld together a custom set of traction bars for any truck.