USA Standard Gear Spider Gear Set - Fits Ford 9" Differential With 31-Spline, 4-Pinion Design (Part ZIKF9-S-31-4)

Rebuilding a Ford 9-inch differential? This spider gear set from USA Standard Gear is exactly what you need. It's designed specifically for Ford 9\ diffs with a 31-spline setup and uses a sturdy 4-pinion design for better strength and load distribution. The part number is ZIKF9-S-31-4, so you know it's the right fit. Made from high-quality materials, these gears are built to handle the torque and stress of off-roading, towing, or just daily driving. Whether you're fixing a worn-out diff or upgrading for more durability, this kit helps you get the job done right the first time. Pair it with other USA Standard Gear components like ring and pinions or installation kits for a complete rebuild. Trusted by gearheads and mechanics alike!