DEFINITION: Any noise emitted from the front of the vehicle that is induced by VEHICLE SPEED or DRIVING TERRAIN as related to the front suspension.

Did you review the system descriptions and perform the necessary Inspections?

Go to Step 2

Go to  Symptoms - Suspension General Diagnosis

Attempt to duplicate the condition. Road test the vehicle.

Did you duplicate the condition?

Go to Step 3

System OK

Is the noise reactive to vehicle load or speed?

Go to Step 4

Go to Step 6

Perform the following inspections:

Did you find and correct the condition?

Go to Step 13

Go to Step 5

Inspect the front wheel bearings and repair as necessary. Refer to Wheel Bearings Diagnosis .

Did you find and correct the condition?

Go to Step 13

Go to Step 6

Bounce the front of the vehicle in order to duplicate the noise.

Did you duplicate the noise?

Go to Step 7

Go to Step 8

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

Did you find and correct the condition?

Go to Step 13

Go to Step 8

1. Install the J 39570 Chassis Ear or equivalent.
2. Bounce the front 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 damaged components, as necessary.

Did you find and correct the condition?

Go to Step 13

Go to Step 9

1. Inspect the ball joints and steering components for the following conditions:

•	Lack of lubrication where applicable.

•	Looseness in the ball joints--Refer to Ball Joint Inspection .

•	Looseness in the tie rods--Refer to Rack and Pinion Outer Tie Rod End Replacement in Power Steering System.

2. Repair components as necessary.

Did you find and correct the condition?

Go to Step 13

Go to Step 10

Inspect the front struts for damage and repair as necessary. Refer to Suspension Strut and Shock Absorber Testing - On Vehicle .

Did you find and correct the condition?

Go to Step 13

Go to Step 11

Inspect the front stabilizer shaft and stabilizer shaft links for damage and repair as necessary. Refer to Stabilizer Shaft Replacement or Stabilizer Shaft Link Replacement in Front Suspension.

Did you find and correct the condition?

Go to Step 13

Go to Step 12

Inspect the control arms for damage and repair as necessary. Refer to Lower Control Arm Replacement or to Front Lower Control Arm Rod Replacement in Front Suspension.

Did you find and correct the condition?

Go to Step 13

--

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3