System Components Intermediate Shift Cylinder Assembly 613 and 6613, 3-Position Selector Valve LO Range - With the Selector valve button in the "LO" position, no air is supplied to the Intermediate cylinder cover center port (1). The constant air from the air filter/regulator assembly (2) moves the piston forward (3), disengaging underdrive/overdrive gearing.
Intermediate or Direct Range - With the Selector valve button in the "INT" or "DIR" position, air is supplied to the Intermediate cylinder cover center port (1), moving the piston rearward, engaging underdrive/overdrive gearing (2).
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