3. Oil Leakage

It is difficult to accurately determine the precise position of a oil leak, since the surrounding area also becomes wet with oil.

The points listed below should be checked for fluid leakage.

Checking method is as follows:

Place the vehicle in the pit, and check whether the leaking oil is ATF or not. The ATF is wine red in color, and can be discriminated easily from engine oil and gear oil.
Wipe clean the leaking oil and dust from a suspect area, using a noninflammable organic solvent such as carbon tetrachloride.
Run the engine to raise the fluid temperature, and set the select lever to "D" in order to increase the fluid pressure and quickly detect a leaking point. Also check for fluid leaks while shifting select lever to "R", "2", and "1".
The places where oil seals and gaskets are applied are:
1. Jointing portion of the case
  - Transmission case and oil pump housing jointing portion
  - Torque converter clutch case and oil pump housing jointing portion
  - Transmission case and extension case jointing portion
    
    Fig 1: Side View Of Transmission Assembly
2. Torque converter clutch case
  - Engine crankshaft oil seal
  - Torque converter clutch impeller sleeve oil seal
  - ATF cooler pipe connector
  - Torque converter clutch
  - Torque converter clutch case
  - Axle shaft oil seal
  - O-ring on the outside diameter of axle shaft oil seal holder
  - O-ring on the differential oil gauge
  - Differential oil drain plug
  - Location of steel balls
3. Oil pump housing
  - Oil pump housing (Defective casting)
  - O-ring on the test plugs
  - Differential gear breather
4. Automatic transmission case
  - Transmission case (Defective casting)
  - Mating surface of oil pan
  - O-ring on the test plugs
  - Oil supply pipe connector
  - ATF cooler pipe connector and gasket
  - Oil pan drain plug
  - O-ring on the transmission harness holder
  - Oil pump plugs
  - ATF breather
  - Select lever oil seal
  - O-ring on the vehicle speed sensor 2 (Front)
  - O-ring on the turbine revolution sensor
  - ATF filter oil seal
5. Extension case
  - Extension case (Defective casting)
  - O-ring on the vehicle speed sensor 1 (Rear)
  - Rear drive shaft oil seal
  - O-ring on the test plugs