Problem Symptoms Table
WARNING: This page is about a different car, the 2006 Lexus IS 350. However, it is still accessible from the selected car via links, so may be relevant.
Front Differential (for 4WD)
PROBLEM SYMPTOMS CHART
| Symptom | Suspected area |
|---|---|
| Noise in front differential | Oil level (Low or wrong grade) |
| Ring gear or drive pinion (Worn or chipped) | |
| Backlash adjustment (Incorrect) | |
| Preload adjustment (Incorrect) | |
| Tooth contact between ring gear and drive pinion (Incorrect) | |
| Bearing (Worn) | |
| Oil leak from front differential | Oil level (Too high or wrong grade) |
| Oil seal (Worn or damaged) | |
| Seal packing (Damaged) |
Rear Differential (for 4GR-FSE)
PROBLEM SYMPTOMS CHART
| Symptom | Suspected area |
|---|---|
| Noise in rear differential | Oil level (Low or wrong grade) |
| Ring gear or drive pinion (Worn or chipped) | |
| Backlash adjustment (Incorrect) | |
| Preload adjustment (Incorrect) | |
| Tooth contact between ring gear and drive pinion (Incorrect) | |
| Bearing (Worn) | |
| Oil leak from rear differential | Oil level (Too high or wrong grade) |
| Side gear shaft oil seal (Worn or damaged) | |
| Seal packing (Damaged) |
Rear Differential (for 2GR-FSE)
PROBLEM SYMPTOMS CHART
| Symptom | Suspected area |
|---|---|
| Noise in rear differential | Oil level (Low or wrong grade) |
| Ring gear or drive pinion (Worn or chipped) | |
| Backlash adjustment (Incorrect) | |
| Preload adjustment (Incorrect) | |
| Tooth contact between ring gear and drive pinion (Incorrect) | |
| Bearing (Worn) | |
| Oil leak from rear differential | Oil level (Too high or wrong grade) |
| Side gear shaft oil seal (Worn or damaged) | |
| Seal packing (Damaged) |