With the new springs in place, the axle can be returned to its proper position on the springs. A bolt in the springs mates to a hole in the axle pads to provide for proper axle positioning. Secure the axle to the springs with the new U-bolts. You'll know you've properly secured the axle when the bottom of the springs flatten out against the tie plate. With the springs in place, you can install the shock bushings and boots and install the shocks. Finally, replace the wheels, allow the full weight of the Jeep to compress the suspension, then tighten all the hardware to the recommended specifications. Retighten after the first 100 miles.