A. Air Pressure Test

A. Air Pressure Test - Transmission Fill Tube Oil Seal:

1. Place the vehicle on a suitable lift.

2. Open the hood and remove the transmission oil fill tube cap.





3. Connect the air pressure regulator hose to the transmission fill tube. Do not connect shop air to the regulator at this time (Fig. 2).

4. Verify that the regulator air pressure setting is turned all the way counterclockwise. This will provide minimal air pressure to the transmission.

CAUTION:
Never allow the air pressure inside the transmission to exceed 34 kPa (5 psi). This could cause transmission oil seal damage or separation the transmission vent cap from the transmission case.

5. Connect shop air to the pressure regulator.

6. Adjust the pressure regulator by turning the adjustment knob clockwise until the regulator gauge reads 14 kPa (2 psi).

NOTE:
A hissing sound may be heard from the transmission vent. This is a normal condition.

7. With the transmission pressurized to 14 kPa (2 psi), raise the vehicle.





8. Apply the leak detection fluid (or suitable soapy solution) around the top of the transmission fill tube oil seal. Inspect for air leakage (bubbles) between the oil seal-to-fill tube connection, and between the oil seal-to-transmission housing connection (Fig. 3).

NOTE:
On some seals with a large leak path, the leak detection fluid may be blown off the seal by the escaping air before the fluid has a chance to bubble.

9. Does the transmission oil fill tube seal leak air when properly pressurized?

a. If YES � Proceed to Section B - Road Testing The Vehicle For Torque Converter Shudder/Buzz.

b. If NO >> Proceed to Section C - Fill Tube Oil Seal Replacement.