Differential steering has two power inputs. One from the transmission which controls the speed and direction of movement (FORWARD or REVERSE). The second source of power is from the hydraulic steering motor which determines the direction of a turn (LEFT or RIGHT). The motor is a piston type and produces variable rotation speed in both directions. The system is also equipped with an axle shaft on each outer side and an axle shaft in the center for a total of 3 shafts.