Speedmaster Ford 9" 28 Spline 4.56:1 Ratio Ring and Pinion Gears Set 8620

This Speedmaster Ford 9" ring and pinion gear set is engineered for high-performance automotive differential applications. The 28-spline design with 4.56:1 ratio delivers aggressive acceleration and torque multiplication, making it ideal for street performance, drag racing, and heavy-duty towing scenarios where gear ratio optimization is critical.

Crafted from durable 8620 steel, this gear set is built to withstand demanding driving conditions and power loads. The precision-cut teeth and tight tolerances ensure smooth, reliable engagement within Ford 9" rear differentials. This ring and pinion combination is a direct bolt-in upgrade for compatible Ford vehicles, providing immediate gains in low-end responsiveness and pulling power without requiring extensive modification to your differential housing.

Key Features & Benefits

• 4.56:1 Gear Ratio: Aggressive ratio designed for maximum acceleration and torque delivery in performance and heavy-duty applications.
• 28 Spline Design: Industry-standard spline count ensures secure mesh and compatibility with Ford 9" differentials.
• 8620 Steel Construction: High-strength material withstands extreme loads and prolonged use in racing and towing environments.
• Ford 9" Fitment: Direct replacement for Ford 9" rear differentials on compatible vehicles.
• Precision-Cut Teeth: Manufactured to tight tolerances for smooth, consistent engagement and minimal wear.

Specifications

Ideal Applications

• Street performance and muscle car acceleration upgrades
• Drag racing and high-horsepower engine builds
• Heavy-duty towing and hauling load optimization
• Off-road and 4x4 terrain driving scenarios