{"product_id":"31-spline-ford-9-inch-differential-spool","title":"31 Spline Ford 9-Inch Differential Spool","description":"The USA Standard Gear spool (ZP FSF9-31) is engineered for Ford 9-inch axles featuring 31-spline configurations. This component provides a robust solution for achieving 100% traction to both wheels simultaneously, directly replacing the factory differential carrier assembly. Constructed from premium 8620 steel and subjected to heat treatment, the spool is built for enhanced durability and strength.\n\nThis differential spool is specifically recommended for dedicated off-road and drag racing applications, where its 100% lockup capability offers a significant performance advantage.\n\nThe USA Standard Gear spool fits a wide array of Ford, Lincoln, and Mercury vehicles, primarily from the 1950s through the 1980s, including models such as the Bronco, E-Series vans, F-Series trucks, Thunderbird, Continental, Cougar, and Grand Marquis. Specific fitments are detailed in the extensive compatibility table.","brand":"USA Standard Gear","offers":[{"title":"Default Title","offer_id":52870631031096,"sku":"ZP FSF9-31","price":179.89,"currency_code":"USD","in_stock":true}],"url":"https:\/\/store.motormia.co\/products\/31-spline-ford-9-inch-differential-spool","provider":"MOTORMIA","version":"1.0","type":"link"}