Repairing the Fluid Leak

Once you have located the leak point, determine the source of the leak. The following list describes the potential causes for the leak:

• Fasteners are not tightened to specification.
• Fastener threads and fastener holes are dirty or corroded.
• Gaskets, seals, or sleeves are misarranged, damaged, or worn.
• Gasket surfaces or seal bores are damaged, warped, or scratched.
• Loose or worn bearings can cause excess seal or sleeve wear.
• The case or the components are too porous.
• The fluid level is too high.
• The vent is damaged or the vent tube is damaged.
• The fluid contains water or coolant.
• The fluid drain back holes are plugged.