Hydraulic Controls
The hydraulic control system is controlled by the TCM or the PCM, the transmission fluid pump, and the valves and the solenoid valves in the valve body. The transmission fluid pump is driven by the engine turns. The transmission fluid pump drive sprocket is connected to the torque converter housing, turns as the engine turns, and drives the transmission fluid pump driven sprocket by the transmission fluid pump drive chain. The transmission fluid pump supplies hydraulic pressure to the hydraulic circuit. Fluid from the transmission fluid pump passes to the various control valves, the drive/driven pulleys, the forward clutch, and the reverse brake.