Possible Points of Fluid Leaks
WARNING: This page is about a different car, the 2010 GMC Sierra and 2010 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Transmission Oil Pan
- Incorrectly tightened oil pan bolts
- Improperly installed or damaged oil pan gasket
- Damaged oil pan or mounting face
- Incorrect oil pan gasket
- Incorrectly tightened or damaged drain plug
Case Leak
- Damaged output speed sensor seal
- Damaged manual shaft seal
- Loose or damaged oil cooler connector fittings
- Worn or damaged propeller shaft oil seal
- Loose line pressure pipe plug
- HV 3 Phase cable lug box
- Porous casting warped dampener housing
Leak at the Dampener End
- Dampener leak in the weld area
- Dampener seal lip cut. Check the Dampener hub for damage
- Dampener seal bushing moved forward and damaged
- Dampener seal garter spring missing from the seal
- Porous casting of the transmission case or the oil pump
Leak at the Vent Pipe
- Overfilled system
- Water or coolant in the fluid; The fluid will appear milky
- Transmission case porous
- Incorrect fluid level indicator
- Plugged vent
- Drain-back holes plugged
- Mispositioned oil pump to case gasket, if equipped
Leak at the Case Extension
- Output shaft seal assembly - located in the case
- Output shaft seal assembly - located in the case extension
| Callout | Component Name |
|---|---|
| 1 | 24-Way Connector Assembly or A/Trans Electrical Connector Passage Sleeve |
| 2 | A/Trans Vent Pipe |
| 3 | A/Trans Torque Dampener Housing Gasket |
| 4 | A/Trans Fluid Cooler Pipe Fitting Seal |
| 5 | Line Pressure Test Hole Plug or Auxiliary Pump Pressure Test Hole Plug |
| 6 | Drive Motor/Generator Power Inverter Module Cable Housing Cover Seals |
| 7 | Park Pawl Cover Seal |
| 8 | Manual Shift Shaft Seal |
| 9 | Transmission Fluid Fill Tube Seal |
| 10 | A/Trans Rear Case Gasket |
| 11 | Extension Assembly Gasket |
| 12 | A/Trans Case Assembly |
| 13 | Output Seal |
| 14 | A/Trans Fluid Pan Gasket |
| 15 | A/Trans Torque Dampener Seal |
| 16 | A/Trans Torque Dampener Assembly |
| 17 | A/Trans Fluid Pan Drain Plug O-Ring Seal |