When the selector lever is moved to the Drive position on the quadrant, the manual valve is positioned to allow line oil to enter the drive circuit and is directed to the 1-2 shift valve, the governor, the 1-2 ccumulator valve and the high speed downshift timing valve.

The drive oil directed to the 1-2 accumulator valve is regulated and directed to fill the bottom portion of the accumulator. The drive oil also passes through an orifice at the high speed downshift timing valve and passes through the valve to apply the low band servo. Drive oil at the governor is regulated to a variable pressure which increases with vehicle speed and acts on the ends of the 1-2, 2-3 shift valves, high speed downshift timing valve, and the vacuum modulator valve.

Summary

The clutches are off, the low band is applied, the transmission is in Drive Range - First Gear.