5.67 Ford 9in Pro Gear 28 Spline

The 5.67 Ford 9in Pro Gear 28 Spline by Richmond is a precision ring and pinion set engineered for serious Ford 9-inch differential builds, designed for enthusiasts who demand both reliability and performance in high-horsepower applications. This gear package serves as the core component in custom rear-end assemblies, enabling you to achieve specific gear ratios that optimize engine torque delivery across your intended power band. Whether you're building a street machine, weekend racer, or restoration project, the correct gear selection directly impacts acceleration, top speed, and overall drivability—making this Richmond offering a critical investment in your vehicle's final drive system.

Richmond's Pro Gear line delivers OEM-quality manufacturing with tight tolerances and premium gear tooth geometry that minimizes noise and backlash under load. The 28-spline design provides superior load distribution compared to older 31-spline or straight-spline configurations, allowing the gears to handle increased horsepower and torque without premature wear or chipping. The 5.67 ratio is ideal for street and street-strip applications where you need strong low-end acceleration without sacrificing highway cruising capability—common choice for 302-based small-blocks and turbocharged platforms seeking responsive power delivery with manageable RPM at cruise.

This gear set fits all Ford 9-inch differentials with 28-spline axles, making it compatible with both original Traction-Lok units and modern limited-slip or spool carriers. Installation requires proper bearing preload setup, ring gear backlash adjustment, and carrier assembly knowledge—most builders pair this with a quality rebuilding kit and bearing set to ensure longevity. At 19.64 pounds, the assembly is substantial enough to demand respect during installation; work with a dial indicator and trusted torque specs to guarantee quiet, efficient operation once your build is complete.