Richmond Gear 79-0043-1 Pro Gear Ring and Pinion Set 3.89 Ratio Ford 9 Inch

The Richmond Gear 79-0043-1 Pro Gear Ring and Pinion Set is engineered specifically for drag racing and extreme performance applications where maximum strength under harsh conditions is critical. This professional-grade gear set features a 3.89:1 ratio designed for Ford 9-inch differentials and delivers exceptional durability for high-horsepower builds.

Key Features:

• Race-Only Design: Manufactured from softer, more malleable 9310 steel alloy specifically engineered to resist breakage under extreme horsepower and hard launches
• Big Pinion Configuration: Features a 1.875-inch pinion shaft diameter with 35-spline pinion for enhanced load capacity and stability
• Precision Gear Set: 35-tooth ring gear and 9-tooth pinion combination, precision-cut to 1/1000th of an inch tolerances
• Weight Reduction: Delivers up to 6 pounds of rotating weight loss compared to standard gear sets
• Dual-Drilled Ring Gear: Compatible with both 1/2-inch and 7/16-inch ring gear bolts for versatile installation options
• Ground Pinion Threads: Precision-ground threads to gauge quality ensure trouble-free installation
• Special Heat Treatment: Advanced heat treating process provides improved strength while maintaining ductility for racing conditions

Richmond Gear has been the trusted choice of professional racers for over 80 years, with proven victories at the Daytona 500 and NHRA U.S. Nationals. Their Pro Gear line represents the pinnacle of racing differential technology, designed for applications where hard launches and severe heat cycling demand maximum resistance to breakage. Each gear set undergoes rigorous quality control and testing to ensure it meets the extreme standards required for professional competition.

Note: This is a race-only gear set designed for dedicated competition use. Requires special pinion support (not included). Backed by Richmond's 2-year or 100,000-mile warranty.