3RD Clutch Hydraulic Circuit Air Check

To air check 3rd clutch hydraulic circuit, apply air to the 3rd clutch apply pressure port. (For proper location, refer to "Pressure Ports - Transaxle Case Diagram".) When applying air to 3rd clutch, a small amount of cross leakage between 3rd and 2nd clutch is normal. Second clutch should not immediately apply when applying air to the 3rd clutch apply port, while blocking the 2nd clutch apply port. However, it is normal for 2nd clutch to apply within 2 - 3 seconds after applying air to the 3rd clutch apply port when the 2nd clutch apply port is blocked. This is due to a small amount of normal leakage around the input shaft O-ring seal between the 2nd and 3rd clutch.
If 3rd clutch does not apply properly when performing the air check, possible sources of leakage include:
- Damaged 3rd clutch piston (1).
- Worn or damaged input shaft hub seal ring(s) (2).
- Delivery tube bushing in input shaft mislocated or loose (3).

NOTICE: To verify that the bushing is at the correct depth refer to the procedure titled "Misplaced or Loose Input Shaft Inner Tube Bushing Check" procedure.

- Damaged clutch housing-to-input shaft O-ring seal under 3rd clutch (4).
- Damaged clutch housing-to-input shaft O-ring seal between 3rd and 2nd clutches (5).
- Damaged input shaft inner tube O-ring seal (6).
- Damaged/missing delivery tube sleeve (7).
- Input shaft inner tube retaining pin out of position (8).
- Damaged servo piston cover O-ring (9).

NOTICE: A large leak in 1st gear circuit can cause a loss of other forward gears.