5.00 Ford 9in Pro Gear 28 Spline

The 5.00 Ford 9-inch Pro Gear 28 Spline ring and pinion kit delivers the performance gains demanded by serious off-road enthusiasts and high-horsepower applications. This Pro Gear set is engineered to handle the stresses of aggressive driving—from trail recovery operations to dyno-tested engine builds—while maintaining the precision necessary for smooth, quiet gear engagement and long service life in demanding environments.

The 5.00 ratio provides a significant numerical advantage, dropping engine RPM at highway speeds while multiplying torque multiplication for improved acceleration and towing capability. The 28-spline pinion design ensures robust power transfer and compatibility with high-strength axle shafts common in modern 9-inch differentials. Pro Gear manufacturing applies precision tooth geometry and premium materials to reduce friction losses and extend ring life under continuous high-load operation. This is a complete ring and pinion kit—everything needed for a straightforward installation on Ford 9-inch housings.

This kit is ideal for Ford truck owners, hot rodders, and performance builders who need a bulletproof gear ratio for custom engines, supercharger builds, or heavy-duty towing setups. The 5.00 ratio sits in the sweet spot between fuel economy and performance—useful for vehicles that see both highway miles and aggressive driving. Anyone with a Ford 9-inch rear end looking to maximize driveline reliability and performance will find this kit a proven solution.

Ford 9-inch differentials remain the platform of choice for custom builds and high-horsepower applications due to their strength, aftermarket support, and tuning potential. Gear ratio selection is foundational—it affects acceleration feel, top speed, fuel economy, and engine stress. A quality ring and pinion kit like this Pro Gear set ensures smooth, efficient power delivery and durable performance for years of hard use.