Air Checking Procedures

CAUTION: Protect yourself by wearing safety glasses when performing the following procedures.

Before you begin:
- Regulate the shop air to between 80 and 100 psi. Pressure less than 80 psi or higher than 100 psi may lead to a misdiagnosis.
- Inspect the rubber-tipped nozzle to verify that it is in good condition.









1. Remove valve body. (Refer to "Valve Body Removal".)
2. Place the rubber-tipped nozzle in the proper apply port pressing firmly to create a good seal between the nozzle and the apply port.
3. Apply air to the hydraulic circuit and watch for the clutch to move quickly.
4. After the clutch has been applied, hold the air nozzle tightly against the port, forming a seal, and release the trigger on the air nozzle. While the air nozzle is still held tightly against the port, the clutch should hold pressure for approximately one to two seconds before slowly releasing. Listen and look for leaks during and/or after trigger release.
- If a leak cannot be heard/seen and the clutch does not apply or hold pressure, it may be necessary to apply a small amount of automatic transaxle fluid around the outside of the clutch housing or the clutch apply plate face and retest.
- If no air leak at the clutch can be found, the leak is most likely not a cut/torn clutch piston, but is more likely one of the other potential causes listed in the section for the appropriate clutch in question.

NOTICE: A small amount of air bubbles coming from the lube holes of the clutch housing that is being air checked is normal.