Aeroflow Ford 9" Street Diff Gear - 3.89:1 Ratio (AF5076-0389)

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.