Transmission Fluid Leakage in Torque Converter Area
WARNING: This page is about a different car, the 2011 Lincoln MKZ and 2011 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
Leakage at the front of transmission, as evidenced by transmission fluid around the torque converter housing part of the case, may have several sources. By careful observation it is possible, in many instances, to pinpoint the source of a leak before removing the transmission from the vehicle. The paths which the transmission fluid takes to reach the bottom of the torque converter housing are shown in the illustration. The 5 numbers in the illustration correspond with the 5 flow path steps.
SYMPTOM TABLE - TRANSMISSION FLUID LEAK PATH
| Leak Path | Symptom | Possible Source |
|---|---|---|
| 1, 2 and 4 | Leak at front of transmission | Torque converter hub seal |
| 1, 2 and 4 | Leak at front of transmission | Vent |
| 1, 2 and 4 | Leak at front of transmission | Converter hub weld |
| 1, 2 and 4 | Leak at front of transmission | External pump seal (large) |
| 1, 2 and 4 | Leak at front of transmission | Pump to case screws |
| 1, 2 and 4 | Leak at front of transmission | Pump gasket |
| 3 | Leak at front of transmission | Torque converter seal weld |
| 3 | Leak at front of transmission | Torque converter stud |
| 5 | Leak at front of transmission | Engine oil leak; rear main seal |
| 5 | Leak at front of transmission | Engine valve cover |
| 5 | Leak at front of transmission | Oil galley |
| 5 | Leak at front of transmission | Pump lip seal |
| 5 | Leak at front of transmission | Engine Oil Pressure (EOP) sensor |