Initial Inspection and Diagnostic Overview

1. Road test.
- Verify the customer's concern by performing a road test on a smooth road. If any vibrations are apparent.

2. Inspect tires.
- Check the tire pressure with all normal loads in the vehicle and the tires cold; refer to the vehicle certification (VC) label.
- Verify that all tires are sized to specification.
- Inspect the tires for improper wear and damage.

3. Inspect chassis and underbody.
- Remove any excessive accumulation of mud, dirt or road deposits from the chassis and underbody.

4. Inspect for aftermarket equipment.
- Check for aftermarket changes to the steering, suspension, wheel and tire components (such as competition, heavy duty, etc.) The specifications shown do not apply to vehicles equipped with aftermarket equipment.

5. If an obvious cause for an observed or reported condition is found, correct the cause (if possible) before proceeding to the next step.
- Inspect the following:
Front wheel bearings
Loose or damaged front or rear suspension components
Loose, damaged or missing suspension fastener(s)
Loose or damaged shackle(s)
Improper spring usage
Damaged or sagging spring(s)
Improper torsion bar usage
Damaged or sagging torsion bar(s)
Damaged or leaking shock absorber(s)
Worn or damaged suspension bushing(s)
Loose, worn or damaged steering system components
Damaged axle components

6. If the fault is not visually evident, determine the symptom and proceed to the symptom chart. Symptom Related Diagnostic Procedures