In a steering gear box, gears transfer steering wheel motion to the steering linkage. They also function as reduction gears, decreasing the force needed to turn the wheels. This reduction is achieved by increasing the gear ratio. A higher gear ratio necessitates more steering wheel turns for the driver but requires less effort for equivalent wheel movement. The gear ratio directly amplifies the driver's input torque, facilitating easier steering, particularly at lower speeds. Output torque is a consequence of the gear ratio, not its primary design purpose. Turning angle and scrub radius are independent of the gear box's reduction function. Consequently, gear ratio is the accurate selection.