Models Without ABS
- Raise and support vehicle. Remove rear wheels. Support rear axle with jack. Unbolt both rear shock absorbers from rear axle.
- Unbolt track bar from rear axle. Track bar fits between top of rear axle and body. Loosen leaf spring-to-front spring hanger pivot bolts. DO NOT remove pivot bolts.
- Lower rear axle fully downward. Ensure rear axle moves freely fully downward and does not contact any service equipment. Loosen valve adjustment nut on valve actuator at height-sensing proportioning valve. See Fig 1 . Height-sensing proportioning valve is located on outside of driver's side frame rail, in front of rear axle.
- Ensure hooked end of valve actuator is fully seated in clip on lever of height-sensing proportioning valve. Ensure clip is correctly positioned on lever of height-sensing proportioning valve.
- Pull valve actuator housing toward front of vehicle until lever on height-sensing proportioning valve bottoms on height-sensing proportioning valve. See Fig 1 .
- Hold valve actuator housing in this position while tightening valve adjustment nut to specification. See TORQUE SPECIFICATIONS table. Reinstall shock absorbers and track bar on rear axle with bolts/nuts loosely installed. DO NOT tighten bolts/nuts at this time.
- Install rear wheels. Tighten lug nuts to specification. See TORQUE SPECIFICATIONS table. Lower vehicle to normal operating position with all vehicle weight on suspension.
- Tighten leaf spring-to-front spring hanger pivot bolts, shock absorber-to-rear axle bolt and track bar-to-rear axle bolt to specification. See TORQUE SPECIFICATIONS table. Road test vehicle to ensure proper brake operation.
NOTE:
When lowering rear axle, ensure leaf springs DO NOT contact any service equipment such as hoist. Rear axle must move freely downward to extent of its normal travel. If rear axle contacts any service equipment, improper adjustment of height-sensing proportioning valve will result.
CAUTION:
Vehicle must be in normal operating position with all vehicle weight on suspension system before tightening shock absorbers, track bar and leaf spring-to-front spring hanger pivot bolts to specification.