Abstract: The present invention provides an improved traction control system which can be advantageously applied to a vehicle which does not employ a spark ignition engine, such as a vehicle powered by a diesel engine. In an embodiment of the invention, a traction control unit (TCU) and a digital potentiometer are interfaced between the wheel speed sensors and the vehicle ECU. The traction control unit senses wheel, the traction control unit causes the digital potentiometer to decrement the throttle position sensor voltage read by the ECU, which in turn reduces the fuel flow through the fuel injector. The reduction in fuel flow reduces the wheel speed and/or wheel torque thereby allowing the slipping wheels to regain traction.