Leakage Inspection
Leakage Inspection
Leak Check Test with a Black Light
NOTE: Dye-Lite(R) ATF/Power Steering Fluid Leak Detection Dye 164-R3701 is used to detect a transmission fluid leak.
1. Add dye to the transmission fluid. Use one 30.0 ml (1 oz) of dye solution for every 3.8L (4 qt) of transmission fluid.
2. Start and run the engine until the transmission reaches its normal operating temperature. Using the 100W/12-Volt DC UV Lamp, observe the back of the cylinder block and top of the torque converter housing for evidence of transmission fluid leakage. Raise the vehicle on a hoist and run the engine at fast idle, then at engine idle, occasionally shifting to the Drive and REVERSE ranges to increase pressure within the transmission. Observe the front of the flexplate, back of the cylinder block (in as far as possible), inside the torque converter housing and the entire case until transmission fluid leakage is evident and the probable source of leakage can be determined.
External Fluid Leaks
External Sealing
NOTICE: Do not try to stop a transmission fluid leak by increasing the torque beyond specifications. This may cause damage to the transmission case threads.
The transmission has the following parts to prevent external transmission fluid leakage:
- Gaskets
- Lip-type seals
- O-ring seals
- Seal rings
- Seal grommets
- Thread sealant
External Sealing
Fluid Leakage in Torque Converter Area
In diagnosing and correcting transmission fluid leaks in the pump support and gear and torque converter area, use the following procedures to locate the exact cause of the transmission fluid leakage. Transmission fluid leakage at the front of the transmission, as evidenced by transmission fluid around the torque converter housing, may have several sources. By careful observation it is possible, in many instances, to pinpoint the source of 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.
