When the going gets though, you can turn on the traction with Power Front-Wheel Drive at the click of a switch. Immediately, you receive a traction boost to help move you through tough spots and improve steering action on sidehills and soft ground. It's in intregal part of the hydraulic system available for factory installation on the 4020 Tractors. The drive can be engaged or disengaged in either high- or low- torque operating positions on the go. the transmission speed selector controls the direction of rotation; front wheels are automatically matched to ground speed. You can use the drive momentarily or full time; it's always ready when you need it. Now, you can move into your fields early, steering a straight course in rolling land, move surefootedly over slick surfaces- handle jobs in conditions that will cause conventional 2-wheel-drive tractors to spin to a standstill. It's a s good as it sounds.