Installation of the new rear arms is identical to the process used on the front suspension. Place a shim on each side of the bushing, position the arm in the framerail bracket, and install the mounting bolt. Repeat on the axle end of the arm. Be sure the grease fitting on the axle bracket end of the arm points toward the rear of the vehicle, and the fitting on the framerail end points to the ground. Tighten the bolts to 130 lb-ft.