Ford 9" Street Diff Gear - 3.89:1 Ratio Suit Ford 9" 28 Spline Pinion

Aeroflow street performance ring and pinion Ford 9" differential gears are strong but quiet performers. Manufactured from 8620 grade steel to handle some of the harshest conditions. Designed with a gear tooth surface finish which reduces both friction & heat for long races & high torque conditions. We use high grade steel in both the ring & pinion gears, with fitment designed to OEM specs. We offer these in a 28-spline pinion and various gear ratios to suit a variety of applications.