In Drive 3, the transaxle drive is through the input shaft to clutches B and E. The elements of this transaxle operation are as follows:
In Park and Neutral, solenoid valves 1 and 2 are both ON. Pressure control solenoids 4 and 6 are also turned ON.
When the solenoid 6 is ON, the fluid supplied from the reduction valve flows to the safety valve, the clutch valve B, and the holding valve B. The oil that is supplied to the inlet port of the clutch valve presses on the valve spool. Line pressure flows to the holding valve and the check ball, engaging clutch B.