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Noise Diagnosis - Rear Suspension

NOTE: Any noise emitted from the rear of the vehicle that is induced by vehicle speed or driving terrain as related to the rear suspension.
  1. Did you review the General Description and perform the necessary inspections? If so, go to step  2. If not, go to SYMPTOMS - SUSPENSION GENERAL DIAGNOSIS .
  2. Verify that the rear suspension is noisy. Is the rear suspension noisy? If so, go to step  3. If not, system is OK.
  3. Shift the transmission into Park. Turn the ignition off. Bounce the rear of the vehicle in order to duplicate the noise. Is the complaint noise present? If so, go to step  4. If not, go to step  5.
  4. Bounce the rear of the vehicle. Use a stethoscope in order to locate the source of the noise. Repair or replace the suspect components as necessary. After repairs are complete, go to step  23.
  5. Raise and support the vehicle. Inspect all of the rear suspension components for any damage. Are any components damaged? If so, go to step  6. If not, go to step  7.
  6. Repair or replace any damaged components. After repairs are complete, go to step  23.
  7. Inspect the tires for proper inflation. Correct the tire inflation pressure as necessary. Inspect the tires for unusual wear. Does either tire exhibit unusual tread wear? If so, go to step  8. If not, go to step  10.
  8. Rotate the tires. Refer to TIRE ROTATION in TIRES AND WHEELS . Road test the vehicle. Is the noise now emitted from the front of the vehicle? If so, go to step  9. If not, go to step  10.
  9. Replace the tires that are causing the noise. After repairs are complete, go to step  23.
  10. Ensure that the park brake cable and the spare tire are secured properly. Did you service any components? If so, go to step  23. If not, go to step  11.
    NOTE: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.
  11. Ensure that all of the wheel nuts are tightened to the correct specification. Tighten as necessary. Refer to FASTENER TIGHTENING SPECIFICATIONS in TIRES AND WHEELS . Did you tighten any of the wheel nuts? If so, go to step  23. If not, go to step  12.
  12. Raise and support the vehicle. Use your hand to push and pull the shock absorbers. Is either shock absorber loose? If so, go to step  13. If not, go to step  15.
  13. Inspect the shock absorber fasteners for the correct fastener tightening specification. Tighten as necessary. Refer to TORQUE SPECIFICATIONS . Use your hands in order to push and pull the shock absorber. Is the shock absorber loose? If so, go to step  14. If not, go to step  23.
  14. Replace the loose or worn shock absorber. Refer to SHOCK ABSORBER . After repairs are complete, go to step  23.
  15. Use your hands in order to push and pull on the rear axle tie rod. Is the rear axle tie rod loose? If so, go to step  16. If not, go to step  18.
  16. Inspect the rear axle tie rod fasteners. Tighten as necessary. Refer to TORQUE SPECIFICATIONS . Use your hands in order to push and pull on the rear axle tie rod. Is the rear axle tie rod loose? If so, go to step  17. If not, go to step  23.
  17. Replace the rear axle tie rod as necessary. After repairs are complete, go to step  23.
  18. Use your hands in order to push and pull on the rear axle trailing arm. Is either rear axle trailing arm loose? If so, go to step  19. If not, go to step  21.
  19. Inspect the rear axle trailing arm fasteners for the correct fastener tightening specification. Tighten as necessary. Refer to TORQUE SPECIFICATIONS . Use your hands in order to push and pull on the rear axle trailing arm. Is either rear axle trailing arm loose? If so, go to step  20. If not, go to step  23.
  20. Replace any worn or loose rear axle trailing arm bushings. After repairs are complete, go to step  23.
    1. Use an on-vehicle wheel balancer in order to spin the rear wheels.
    2. Increase the wheel speed until the noise is at the most audible level.
      NOTE: Do not allow the stethoscope to contact any moving components.
    3. Use a stethoscope in order to locate the source of the noise.
    Does either wheel bearing exhibit excessive noise? If so, go to step  22. If not, go to step  8.
  22. Replace the wheel bearing. Refer to WHEEL BEARING/HUB REPLACEMENT - REAR . After repairs are complete, go to step  23.
  23. Operate the vehicle in order to verify the repair. Does the system operate normally? If so, system is OK. If not, go to step  3.
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