See Figure 1
- Raise the vehicle on a hoist and place supports beneath the underbody and under the axle.
- Disconnect the lower end of the shock absorber from the spring clip plate and move it out of the way. Remove the supports from under the axle.
- Remove the spring plate nuts from the U-bolts and remove the clip plate. Raise the rear axle just enough to remove the weight of the housing from the spring.
- Remove the two rear shackle attaching nuts, the shackle bar and two inner bushings.
- Remove the rear shackle assembly and two outer bushings.
- Remove the nut from the spring mounting bolt and tap the bolt out of the bushing at the front hanger. Lift out the spring assembly.
- If the front hanger bushing is to be replaced, it may be necessary to take the spring assembly to a machine shop and have the old bushing pressed out and a new one pressed in.
Inspect the rear shackle and hanger assembly, bushings, and studs for wear, damage, cracks, or distortion. Check for broken spring leaves. Inspect the leaves for missing anti-squeak inserts. Inspect the spring clips for worn or damaged threads. Check the spring clip plate and insulator retainers for distortion. If the spring center tie bolt requires replacement, clamp the spring in a vise to keep the spring compressed during bolt removal and replacement. Replace all parts found to be defective.
All used attaching components (nuts, bolts, etc.) must be discarded and replaced with new ones prior to reassembly. This is due to extreme stresses and weather which weaken the attaching hardware under normal service. If a used component is reinstalled, it may break.
- Position the leaf spring under the axle housing and insert the shackle assembly into the rear hanger bracket and the rear eye of the spring.
- Install the shackle inner bushings, shackle plate, and locknuts. Hand-tighten the locknuts.
- Position the spring front eye in the front hanger, slip the washer on the front hanger bolt, and, from the inboard side, insert the bolt through the hanger and eye. Install the locknut on the hanger bolt and tighten finger-tight.
- Lower the rear axle housing so that it rests on the spring. Place the spring plate on the U-bolts. Install the U-bolt nuts and torque to 30-45 ft. lbs. on 1968 and earlier models and 35-50 ft. lbs. on 1969-1973 models.
- Attach the lower end of the shock absorber to the spring plate using a new nut.
- Place safety stands under the axle housing, lower the vehicle until the spring is in the approximate curb load position, and then torque the front hanger stud locknut to specification. On pre-1970 models torque the locknut to 35-55 ft. lbs.; 1970 models, 70-100 ft. lbs.; 1971 models, 100-300 ft. lbs.; 1972 models, 90-110 ft. lbs.; 1973 models, 100-140 ft. lbs.
- Torque the locknuts on the rear shackle to 15-22 ft. lbs. on pre 1970 and 1973 models, and 18-29 ft. lbs. on 1970-1972 models. Close the hole in the inner rail with a body plug.
- Remove the safety stands and lower the vehicle.