Ensure your semi truck is Ready for the Road Ahead with smooth and reliable steering, with the Motor Medic Synthetic Power Steering Fluid. To efficiently change directions without excessive wheel play, this replacement fluid works to transmit hydraulic pressure from the steering wheel to the steering mechanism. Wheel vibrations, increased steering effort, warning lights, and other similar types of issues can all be signs of low fluid levels or a potential leak. FleetPride is your First Click in Heavy Duty .