Possible Points of Fluid Leaks
WARNING: This page is about a different car, the 2006 GMC Yukon XL, 2006 Chevrolet Suburban, and 2006 Chevrolet Avalanche. 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
- Warped
- Distorted torque converter housing
- Porous casting
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 |
|---|---|
| 3 | Bolt and Seal Assembly, A/Trans O/Pump |
| 5 | Seal, A/Trans Oil Pump |
| 8 | Connector, Transmission Oil Cooler Pipe |
| 9 | Pipe, Vent |
| 15 | Seal, Case Extension |
| 20 | Seal Asm., Prop Shaft Front Slip Yoke Oil |
| 22 | Sensor Assembly, A/T Input Speed and 2WD Output Speed (4WD Plug) |
| 24 | Plug, Line Pressure Test Hole |
| 27 | Bolt, Oil Pan |
| 29 | Seal, Transmission Oil Pan |
| 34 | Harness Assembly, A/Trans Wiring |
| 201 | Seal Asm., Torque Converter Oil |
| 707 | Seal, Manual Shift Shaft |