Our buggy uses a hydraulic valve from PSC to control the rear steer (arrow). This is plumbed between the pump and the rear hydraulic ram and mounted beside the driver seat. Our system will turn the rear wheels as long as we have the valve open. When we release the valve the wheels stay pointed where we turned them to. To center the rear, we have to manually steer it back; it does not return automatically like a front steering gearbox does.