Diagnosis And Testing - Axle: Notes
DIAGNOSTIC CHART
| CONDITION | POSSIBLE CAUSE | CORRECTION |
|---|---|---|
| WHEEL NOISE | 1. Wheel loose. | 1. Tighten loose lug nuts. |
| 2. Faulty, brinelled wheel bearing. | 2. Replace wheel bearing. | |
| LOSS OF LUBRICANT | 1. Lubricant level too high. | 1. Drain lubricant to the correct level. |
| 2. Worn axle seals. | 2. Replace axle seals. | |
| 3. Worn pinion seal. | 3. Replace pinion seal. | |
| 4. Worn/scored pinion flange journal. | 4. Replace axle assembly. | |
| 5. Axle cover not properly sealed. | 5. Replace axle assembly. | |
| 6. Vent hose/gore vent position is not vertical | 6. Replace gore vent/hose assembly, install in 12 O'Clock orientation. | |
| AXLE OVERHEATING | 1. Lubricant level low. | 1. Fill differential to correct level. |
| 2. Improper grade of lubricant. | 2. Fill differential with the correct fluid type and quantity. | |
| 3. Bearing preload too high. | 3. Replace axle assembly. | |
| 4. Insufficient ring gear backlash. | 4. Replace axle assembly. | |
| GEAR TEETH BROKE | 1. Overloading. | 1. Replace axle assembly. |
| 2. Improper adjustments. | 2. Replace axle assembly. | |
| AXLE NOISE | 1. Insufficient lubricant. | 1. Fill axle with the correct fluid type and quantity. |
| 2. Improper ring gear and pinion adjustment. | 2. Replace axle assembly. | |
| 3. Unmatched ring gear and pinion. | 3. Replace axle assembly. | |
| 4. Worn teeth on ring gear and/or pinion. | 4. Replace axle assembly. | |
| 5. Loose pinion bearings. | 5. Replace axle assembly. | |
| 6. Loose differential bearings. | 6. Replace axle assembly. | |
| 7. Misaligned or sprung ring gear. | 7. Replace axle assembly. | |
| 8. Housing not machined properly. | 8. Replace axle assembly. |