In order to get the rear spring out one has to lift the vehicle from the rear to take the weight off the rear springs but the tires should remain on the ground, if the vehicle has Automatic Ride Control the air suspension switch should be turned off. Park the car on a flat ground, block the wheels and raise the rear axle with a jack to work on it, do not attempt to work under a car that is supported by only a jack. Next unscrew the nut and bolt which hold the lower end of the
Shock Absorber to the spring plate then compress the shock and swing it aside. Take out the nuts from U-bolts; then undo the U-bolts and the spring plate. Remove the bolts, and nuts that are holding the shackle assembly on the back side of the spring, this makes the spring to drop down on the floor by folding. Finally take out the small spring that connects the hanger and spring at the front of the spring; do this by unscrewing the spring hanger bolt and nut. Check the springs and check the spring eye bushings for wearing or becoming distorted and replace if needed. For installation set the spring in place in the rear shackle lining up the thru-bolt and nut and making the connection finger tight. Screw in the spring in the front bracket so that the bolt and nut are tightened only enough so they can easily be turned with the fingers. Place the rear shackle on the frame, put the bolt and the nut and only screw the nut by hand until it is tight. Place the desired axle in the spring, fit the spring seat, with spring tie-bolt in the preferred hole and fix the U-bolt and nuts and tighten to a finger tight stage. Last, lower the vehicle to its weight on the tires and then tighten the spring bracket bolt and nut with a nut to the increase torque values and the shackle bolts and nuts and increase torque to the U-bolt nuts.