Manual Shift Valve

Automatic Transmission Manual Shift Valve

The manual shift valve directs line pressure to the circuit selected by the gear selector. It’s connected mechanically to the gear selector by the shift cable. This connection is often adjustable. If incorrectly adjusted the manual shift valve will leak line pressure into the wrong circuit. A slight vehicle creep may be noticed in neutral and damage and overheating of the clutch will result. Inspect the shift cable and linkage adjustment, adjust if necessary. This adjustment is a matter of safety and care should be taken. Always refer to the manufacturer’s manual and look for any TSB’s before any adjustments are made.