The power steering gear system has a rotary control valve. The rotary control valve directs the hydraulic fluid coming from the hydraulic pump to the following locations:

The integral rack piston attaches to the rack. The rack piston converts the hydraulic pressure to a linear force. The force moves the rack in the following directions:

The force is transmitted through the following components to the struts in order to turn the wheels:

If a hydraulic assist is not available, the manual control functions. The manual control requires more steering effort. The movement of the steering wheel transfers to the pinion. The movement of the pinion transfers through the pinion teeth. The pinion teeth mesh with the teeth on the rack causing the rack to move.