Possible Points of Fluid Leaks
WARNING: This page is about a different car, the 2004 GMC Sierra and 2004 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
Case Leak
- Damaged or missing fill tube seal
- Mislocated fill tube bracket
- Damaged vehicle 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
- Porous casting warped torque converter housing
Leak at the Torque Converter End
- Converter leak in the weld area
- Converter seal lip cut. Check the converter hub for damage
- Converter seal bushing moved forward and damaged
- Converter seal garter spring missing from the seal
- Porous casting of the transmission case or the oil pump
Leak at the Vent Pipe or the Fluid Fill Tube
- 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
| Callout | Component Name |
|---|---|
| 1 | Wiring Harness Pass-Through Connector O-ring Seal |
| 2 | Transmission Vent Assembly |
| 3 | Converter Housing to Case Joint (Pump to Case Oil Seal) |
| 4 | Line Pressure Plug |
| 5 | Case Extension to Case Seal |
| 6 | Manual Shaft Seal |
| 7 | Case Extension Oil Seal Assembly |
| 8 | Torque Converter Assembly |
| 9 | Pump to Case Oil Seal |
| 10 | Pump Oil Seal Assembly |
| 11 | Internal Transmission Speed Sensor to Case O-ring Seal - Some Models |
| 12 | 2-4 Servo Cover O-ring Seal |
| 13 | Oil Fill Tube Seal |
| 14 | Oil Cooler Pipe Connectors |
| 15 | Transmission Case |
| 16 | Transmission Oil Pan Gasket |