{"product_id":"national-hm89443-differential-pinion-bearing","title":"National HM89443 Differential Pinion Bearing - Rear Inner or Rear Outer","description":"\u003ch2\u003eNational HM89443 Differential Pinion Bearing Overview\u003c\/h2\u003e\u003cp\u003eThe National HM89443 differential pinion bearing is engineered for reliable driveline performance in select Chrysler, Dodge, Ford, Lincoln, and Mercury vehicles. Designed as a taper bearing cone, this part ensures precise fitment and durability for models including the Ford F-150, Dodge Dart, and Lincoln Navigator.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003ePart Number: HM89443\u003c\/li\u003e\n\u003cli\u003eBrand: National\u003c\/li\u003e\n\u003cli\u003eCategory: Driveline and Axles \u0026gt; Bearings\u003c\/li\u003e\n\u003cli\u003eCone Bore Diameter: 1.3125 inches (33.3380 mm)\u003c\/li\u003e\n\u003cli\u003eCone Length: 1.1250 inches (28.5750 mm)\u003c\/li\u003e\n\u003cli\u003eCone Radius: 0.0250 inches (0.6350 mm)\u003c\/li\u003e\n\u003cli\u003ePart Description: Taper bearing cone\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTechnical Specifications and Attributes\u003c\/h2\u003e\u003cp\u003eThis differential pinion bearing features a cone bore measuring 1.3125 inches (33.3380 mm), providing a precise fit for the pinion shaft. The cone length of 1.1250 inches (28.5750 mm) supports proper bearing seating and load distribution. Additionally, the cone radius of 0.0250 inches (0.6350 mm) is designed to optimize contact surfaces, reducing wear and enhancing bearing life. These dimensions are critical for maintaining differential performance and driveline stability in compatible vehicles.\u003c\/p\u003e\u003ch2\u003eCompatible Vehicles and Applications\u003c\/h2\u003e\u003cp\u003eThe National HM89443 bearing is compatible with a range of vehicles from Chrysler, Dodge, Ford, Lincoln, and Mercury. Notable models include the Ford F-150, F-250 Super Duty, Mustang, Lincoln Navigator, Dodge Dart, and Mercury Villager. This part is suitable for applications requiring a differential pinion bearing cone with the specified dimensions, ensuring proper fit and function in these driveline systems.\u003c\/p\u003e\u003ch2\u003eCommon Issues Addressed by HM89443 Bearing\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eEliminates excessive pinion shaft play and noise\u003c\/li\u003e\n\u003cli\u003ePrevents premature bearing wear and failure\u003c\/li\u003e\n\u003cli\u003eReduces differential gear misalignment\u003c\/li\u003e\n\u003cli\u003eImproves driveline smoothness and stability\u003c\/li\u003e\n\u003cli\u003eSupports proper load distribution within the differential\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eWhen installing the National HM89443 differential pinion bearing, ensure the bearing cone bore matches the pinion shaft diameter precisely. Proper cleaning and lubrication of the bearing and surrounding components are essential to prevent premature wear. Use appropriate tools to seat the bearing cone without causing damage to the cone radius or bore. Verify correct preload settings during assembly to maintain optimal bearing performance.\u003c\/p\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eNational bearings are manufactured to meet industry standards for durability and precision. The HM89443 differential pinion bearing undergoes rigorous quality control to ensure dimensional accuracy and material integrity. While specific warranty details may vary, National typically offers coverage against manufacturing defects, providing confidence in the part's reliability for your Chrysler, Dodge, Ford, Lincoln, or Mercury vehicle.\u003c\/p\u003e","brand":"National","offers":[{"title":"Default Title","offer_id":43450615660725,"sku":"BCZK-HM89443","price":46.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/NS_HM89443_Ang_2ebd722d-9cde-4758-99ec-37df95cb0155.jpg?v=1774734846","url":"https:\/\/www.partcatalog.com\/products\/national-hm89443-differential-pinion-bearing","provider":"PartCatalog","version":"1.0","type":"link"}