Possible Points of Fluid Leaks
WARNING: This page is about a different car, the 2020 Buick Regal and 2019 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
Transmission Valve Body Cover
- Incorrectly tightened bolts
- Improperly installed or damaged gasket/seal
- Damaged mounting face
- Incorrect gasket seal
Case Leak
- Damaged input speed sensor seal
- Damaged manual shaft seal
- Loose or damaged oil cooler lines/seals
- Worn or damaged axle shaft oil seal
- Loose line pressure pipe plug or fluid level pipe plug
- Porous casting
- Warped torque converter housing
- Damaged converter housing to case seal
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 torque converter housing
Leak at the Vent
- Overfilled system
- Water or coolant in the fluid; The fluid will appear milky
- Transmission case porous
- Incorrect fluid level indicator causing an overfilled system
- Plugged vent
Leak Inspection Points
- Transmission Fluid Filler Cap
- Transmission Fluid Filler Tube Plug
- Body Side Wiring Harness Opening Seal
- Manual Shift Shaft Seal
- Torque Converter Housing Gasket
- Automatic Transmission Fluid Level Hole Plug
- Automatic Transmission Fluid Pressure Test Hole Plug
- Automatic Transmission Case Hole Plug
- Front Wheel Drive Shaft Oil Seal
- Automatic Transmission Input Speed Sensor
- Control Valve Body Gasket
- Torque Converter Assembly
- Torque Converter Fluid Seal
- Front Wheel Drive Shaft Oil Seal
- Automatic Transmission Fluid Pan Drain Plug