{"product_id":"remanufactured-axle-assembly-3-31-ratio","title":"Remanufactured Axle Assembly 3.31 Ratio","description":"The Zumbrota Drivetrain RAA435-1906B is a remanufactured axle assembly that ensures precision and reliability for your vehicle's rear differential. This unit is built for Ford 9.75-inch differentials with a 3.31 gear ratio, specifically designed for 1998-1999 Expedition models. The remanufacturing process involves a comprehensive inspection of all internal components, including ring and pinions, internal gears, clutches, and carriers. Furthermore, all bearings, seals, crush sleeves, pinion nuts, and shims are replaced with new parts. The gears are meticulously set to achieve optimal tooth contact patterns and correct rolling torque, measured in inch-pounds, for enhanced setup precision and longevity. Proper gear backlash is also set to guarantee sufficient gear lubrication and quiet operation.\n\nZumbrota Drivetrain employs a rigorous cleaning process, utilizing an exclusive hydro-blast rinse and sandblasting procedure, followed by a proprietary shot-peening deep cleaning. This ensures that internal and external parts are cleaned to OEM standards, with housings being tested for surface wear and cracks. All axle tubes are inspected to ensure they meet OEM specifications for straightness. This assembly includes a cover but does not include fluid.","brand":"Zumbrota Drivetrain","offers":[{"title":"Default Title","offer_id":52870794379576,"sku":"RAA435-1906B","price":3725.0,"currency_code":"USD","in_stock":true}],"url":"https:\/\/store.motormia.co\/products\/remanufactured-axle-assembly-3-31-ratio","provider":"MOTORMIA","version":"1.0","type":"link"}