Ford 9-inch 35-Spline Differential Spool

The USA Standard Gear ZP FSF9-35 is a differential spool engineered for robust performance in demanding applications. Designed specifically for Ford 9-inch rear ends featuring 35-spline axles, this spool ensures that both wheels receive 100% of the available traction at all times, making it ideal for off-road racing, drag racing, or other competitive environments. Constructed for competition-tough use, the ZP FSF9-35 is built to withstand the rigors of high-performance driving. Its design directly interfaces with the ring gear and axle shafts to deliver consistent power to both wheels, maximizing grip and acceleration. While it offers unparalleled traction, it is crucial to note that this spool is not recommended for street-driven vehicles. Its inherent nature of locking both wheels together can lead to tire scrub, increased wear, and difficult handling characteristics in typical road conditions. Proper installation is essential for optimal performance and safety, and users should consult with a professional if they are unsure about the installation process for their specific Ford 9-inch axle setup.