For 1990-2009 cars

Step | Action | Yes | No
--- | --- | --- | ---
DEFINITION: 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 system descriptions and perform the necessary Inspections? | Go to Step 2 | Go to Symptoms - Suspension General Diagnosis
2 | Attempt to duplicate the condition. Road test the vehicle. Did you duplicate the condition? | Go to Step 3 | System OK
3 | Is the noise reactive to vehicle load or speed? | Go to Step 4 | Go to Step 6
4 | Perform the following inspections:

• | Inspect and adjust the tire inflation pressure. Refer to Tire Placard.

• | Inspect the tires for unusual tire wear. Refer to Tire Diagnosis - Irregular or Premature Wear.

• | Inspect the wheel nuts for looseness and tighten as necessary. Refer to Fastener Tightening Specifications.

Did you find and correct the condition?

Go to Step 10

Go to Step 5

5 | Inspect the rear wheel bearings. Refer to Wheel Bearings Diagnosis . Did you find and correct the condition? | Go to Step 10 | Go to Step 6
6 | Bounce the rear of the vehicle in order to duplicate the noise. Did you duplicate the noise? | Go to Step 7 | Go to Step 9
7 |

1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
2. Inspect the rear suspension components for looseness. Refer to Fastener Tightening Specifications.
3. Inspect the rear suspension components for damage and repair as necessary.

Did you find and correct the condition?

Go to Step 10

Go to Step 8

8 | Inspect the rear shock absorbers. Refer to Suspension Strut and Shock Absorber Testing - On Vehicle . Did you find and correct the condition? | Go to Step 10 | Go to Step 9
9 |

1. Install the J 39570 Chassis Ear or equivalent.
2. Bounce the rear of the vehicle, using the J 39570 or equivalent, in order to locate the source of the noise. If necessary, road test the vehicle.
3. Repair or replace any defective component as necessary.

Did you find and correct the condition?

Go to Step 10

System OK

10 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3