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 General Description 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. Refer to Vehicle Certification, Tire Placard, Anti-Theft, and Service Parts ID Label .

• | Inspect for unusual tire wear. Refer to Vibration Analysis - Tire and Wheel .

• | Inspect the wheel nuts for looseness. Refer to Fastener Tightening Specifications .

Did you find and correct the condition?

Go to Step 10

Go to Step 5

5 | Inspect the rear axle for rear axle noises. Refer to Diagnostic Starting Point - Rear Drive Axle . 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 the vehicle. Refer to Lifting and Jacking the Vehicle .
2. Inspect the rear suspension components for looseness and tighten as necessary. 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 absorber. Refer to Suspension Strut and Shock Absorber Testing - On Vehicle . Did you complete the inspection? | 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