4.57 Ford 9in Pro Gear 35 Spline

The 4.57 Ford 9in Pro Gear 35 Spline ring and pinion kit from Richmond is designed for serious Ford 9-inch differential upgrades, making it ideal for high-performance street, strip, and off-road builds. This pro-level gear set is tailored for enthusiasts and professionals who require precision-cut gears and tight tolerances for consistent power delivery in demanding driving conditions.

Featuring a 4.57 gear ratio, this kit provides aggressive acceleration and lower cruising RPMs, which is perfect for vehicles focused on launch performance and mid-range power without compromising highway drivability. Richmond's pro-grade gears utilize a precision spiral-bevel design that ensures smooth engagement, reduced noise, and enhanced durability under load cycling. The 35-spline configuration accommodates heavy-duty axle shafts, distributing stress across a larger contact surface for superior reliability.

This gear set is compatible with Ford 9-inch differentials commonly found in Mustangs, Torinos, Cougars, and various hot rods. Factory-backed quality control and shot-peened surfaces further enhance gear durability and fatigue resistance, making it a reliable choice for maintaining ring-and-pinion integrity during repeated acceleration cycles and sustained torque loads.