Problem Symptoms Table
WARNING: This page is about a different car, the 2006 Lexus IS 250. However, it is still accessible from the selected car via links, so may be relevant.
Front Differential (for 4WD)
FRONT DIFFERENTIAL (FOR 4WD)
| Symptom | Suspected area | Reference |
|---|---|---|
| Noise in front differential | Oil level (Low or wrong grade) | ADJUSTMENT |
| Ring gear or drive pinion (Worn or chipped) | REMOVAL | |
| Backlash adjustment (Incorrect) | INSPECTION | |
| Preload adjustment (Incorrect) | INSPECTION | |
| Tooth contact between ring gear and drive pinion (Incorrect) | INSPECTION | |
| Bearing (Worn) | REMOVAL | |
| Oil leak from front differential | Oil level (Too high or wrong grade) | ADJUSTMENT |
| Oil seal (Worn or damaged) | REMOVAL | |
| Seal packing (Damaged) | REMOVAL |
Rear Differential (for 4GR-FSE)
REAR DIFFERENTIAL (FOR 4GR-FSE)
| Symptom | Suspected area | Reference |
|---|---|---|
| Noise in rear differential | Oil level (Low or wrong grade) | ADJUSTMENT |
| Ring gear or drive pinion (Worn or chipped) | DISASSEMBLY | |
| Backlash adjustment (Incorrect) | INSPECTION | |
| Preload adjustment (Incorrect) | INSPECTION | |
| Tooth contact between ring gear and drive pinion (Incorrect) | INSPECTION | |
| Bearing (Worn) | DIASSEMBLY | |
| Oil leak from rear differential | Oil level (Too high or wrong grade) | ADJUSTMENT |
| Side gear shaft oil seal (Worn or damaged) | REPLACEMENT | |
| Seal packing (Damaged) | DISASSEMBLY |
Rear Differential (for 2GR-FSE)
REAR DIFFERENTIAL (FOR 2GR-FSE)
| Symptom | Suspected area | Reference |
|---|---|---|
| Noise in rear differential | Oil level (Low or wrong grade) | ADJUSTMENT |
| Ring gear or drive pinion (Worn or chipped) | DISASSEMBLY | |
| Backlash adjustment (Incorrect) | INSPECTION | |
| Preload adjustment (Incorrect) | INSPECTION | |
| Tooth contact between ring gear and drive pinion (Incorrect) | INSPECTION | |
| Bearing (Worn) | DISASSEMBLY | |
| Oil leak from rear differential | Oil level (Too high or wrong grade) | ADJUSTMENT |
| Side gear shaft oil seal (Worn or damaged) | REPLACEMENT | |
| Seal packing (Damaged) | DISASSEMBLY |