Shock absorbers require replacement if the car fails to recover quickly after hitting a large bump or if it sways excessively following a directional change.
Always check shock absorbers for signs of oil fluid leaks; if the shock absorber is leaking, replace it.
A good way to test the shock absorbers is to intermittently apply downward pressure to the side of the car until it is moving up and down for almost its full suspension travel. Release it and observe its recovery. If the car bounces once or twice after having been released and then comes to a rest, the shocks are all right. If the car continues to bounce, the shocks will probably require replacement.
REMOVAL & INSTALLATION
- Raise the vehicle and support it with jackstands.
- Support the rear axle with a floor jack.
- Disconnect the height sensor and air line, if equipped. The air line is released by pulling back on the plastic retaining ring.
- Remove the top and bottom shock absorber bolts.
- Remove the shock absorber.
- Position the shock absorber in the vehicle, then install the upper and lower shock absorber bolts finger-tight.
- Tighten the upper mounting bolts to 40 ft. lbs. (55 Nm). At this time do not tighten the lower mounting bolt.
- Attach the height sensor wire and air line (simply push it in until it snaps in place) to the shock absorber.
- Make sure that the lower shock absorber mounting nut is finger-tight, then remove the floor jack from under the rear axle.
- Lower the vehicle to the ground, then tighten the lower shock absorber mounting bolt to 40 ft. lbs. (55 Nm).
- Raise and safely support the rear of the vehicle with jackstands.
- Lift upward on the trailing arm with a floor jack to relieve the weight from the shock absorber.
- Remove the top and bottom bolts of the shock absorber, then remove the shock absorber.
- Position the shock absorber in the vehicle, then install the mounting bolts finger-tight.
- Tighten the top mounting bolt to 60 ft. lbs. (81 Nm) and the bottom bolt to 85 ft. lbs. (115 Nm).
- Lower the trailing arm, then remove the floor jack from under the vehicle.
- Lower the vehicle to the ground.