{"product_id":"national-hm89449-differential-pinion-bearing","title":"National HM89449 Differential Pinion Bearing","description":"\u003ch2\u003eNational HM89449 Differential Pinion Bearing Overview\u003c\/h2\u003e\u003cp\u003eThe National HM89449 differential pinion bearing is engineered to provide reliable support and smooth operation for your vehicle's driveline system. Designed with precise dimensions, this taper bearing cone is compatible with a wide range of makes and models, including BMW, Chevrolet, Mercedes-Benz, and more.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCone bore diameter: 1.4375 inches (36.513 mm)\u003c\/li\u003e\n\u003cli\u003eCone length: 1.125 inches (28.575 mm)\u003c\/li\u003e\n\u003cli\u003eCone radius: 0.140 inches (3.556 mm)\u003c\/li\u003e\n\u003cli\u003ePart type: Taper bearing cone\u003c\/li\u003e\n\u003cli\u003ePart number: HM89449\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTechnical Specifications and Features\u003c\/h2\u003e\u003cp\u003eThis differential pinion bearing features a cone bore of 1.4375 inches (36.513 mm), ensuring a precise fit within the differential assembly. The cone length of 1.125 inches (28.575 mm) and cone radius of 0.140 inches (3.556 mm) contribute to optimal load distribution and durability under demanding driving conditions. Manufactured by National, this bearing is designed to meet OEM standards for performance and reliability.\u003c\/p\u003e\u003ch2\u003eCompatible Vehicles and Applications\u003c\/h2\u003e\u003cp\u003eThe National HM89449 is compatible with various vehicles, including BMW models such as the 325i, 328i, and 330i, as well as Chevrolet trucks like the C1500 and Blazer. It also fits Mercedes-Benz models including the ML320 and ML350, among others. This part is suitable for drivers seeking a replacement differential pinion bearing for their BMW 3 Series, Chevrolet Silverado, or Mercedes-Benz ML-Class vehicles.\u003c\/p\u003e\u003ch2\u003eCommon Issues Addressed by HM89449 Differential Pinion Bearing\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eEliminates differential noise caused by worn or damaged bearings\u003c\/li\u003e\n\u003cli\u003eReduces vibration and improves driveline smoothness\u003c\/li\u003e\n\u003cli\u003ePrevents premature wear of differential gears\u003c\/li\u003e\n\u003cli\u003eRestores proper pinion gear alignment\u003c\/li\u003e\n\u003cli\u003eEnhances overall differential performance and longevity\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eWhen installing the National HM89449 differential pinion bearing, ensure the bearing cone bore matches the pinion shaft diameter for a secure fit. Proper lubrication and torque specifications should be followed according to the vehicle manufacturer’s service manual. It is recommended to inspect related components such as seals and races during installation to maintain optimal differential function.\u003c\/p\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eNational manufactures the HM89449 differential pinion bearing to meet stringent quality standards, ensuring durability and consistent performance. While specific warranty details are not provided, National parts typically adhere to industry standards for reliability and fitment, making this bearing a dependable choice for your vehicle’s driveline maintenance.\u003c\/p\u003e","brand":"National","offers":[{"title":"Default Title","offer_id":51869019013301,"sku":"BCZK-HM89449","price":35.53,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/NS_HM89449_Ang.jpg?v=1774734846","url":"https:\/\/www.partcatalog.com\/products\/national-hm89449-differential-pinion-bearing","provider":"PartCatalog","version":"1.0","type":"link"}