Underdrive Clutch
- Apply air pressure to low-reverse and 2-4 clutches. Output shaft should now be locked. Wrap rubber hose around input shaft. Install clamp-on pliers on input shaft. Rotate input shaft.
- Apply air pressure to underdrive clutch (UD) passage on adapter plate. See Fig 1. Input shaft should not rotate with hand torque. Release air pressure. Ensure input shaft now rotates.