General Diagnostic Chart: Inspection
NOTE:
Vibration while cruising may be caused by an unbalanced tire, improper tire inflation pressure, improper wheel alignment, etc.
DIAGNOSTIC CHART
| Symptom | Possible cause | Corrective action |
|---|---|---|
| Noise or vibration from propeller shaft | Center bearing | Check the center bearing. Ref. to CENTER BEARING FREE PLAY , INSPECTION, Propeller Shaft. |
| Runout of propeller shaft | Check for deflection of the propeller shaft. Ref. to RUNOUT OF PROPELLER SHAFT , INSPECTION, Propeller Shaft. | |
| Loose or gap at connections | Check the joints and connectors. Ref. to JOINTS AND CONNECTIONS , INSPECTION, Propeller Shaft. | |
| Check the spline and bearing. Ref. to SPLINES AND BEARING , INSPECTION, Propeller Shaft. | ||
| Abnormal wheel vibration | Wheel is out of balance. | Check the wheel balance. Ref. to ADJUSTMENT , Wheel Balancing. |
| Front wheel alignment | Check the front wheel alignment. Ref. to INSPECTION , Wheel Alignment. | |
| Rear wheel alignment | Check the rear wheel alignment. Ref. to INSPECTION , Wheel Alignment. | |
| Front strut | Check the front strut. Ref. to INSPECTION , Front Strut. | |
| Rear shock absorber | Check the rear shock absorber. Ref. to INSPECTION , Rear Shock Absorber. | |
| Front drive shaft | Check the front drive shaft. Ref. to INSPECTION , Front Drive Shaft. | |
| Rear drive shaft | Check the rear drive shaft. Ref. to INSPECTION , Rear Drive Shaft. | |
| Front hub unit bearing | Check the front hub unit bearing. Ref. to INSPECTION , Front Hub Unit Bearing. | |
| Rear hub unit bearing | Check the rear hub unit bearing. Ref. to INSPECTION , Rear Hub Unit Bearing. | |
| Noise from the underbody | Wheel is out of balance. | Check the wheel balance. Ref. to ADJUSTMENT , Wheel Balancing. |
| Front wheel alignment | Check the front wheel alignment. Ref. to INSPECTION , Wheel Alignment. | |
| Rear wheel alignment | Check the rear wheel alignment. Ref. to INSPECTION , Wheel Alignment. | |
| Front strut | Check the front strut. Ref. to INSPECTION , Front Strut. | |
| Rear shock absorber | Check the rear shock absorber. Ref. to INSPECTION , Rear Shock Absorber. |