{"product_id":"national-a-42-axle-differential-bearing","title":"National A-42 Axle Differential Bearing - Front or Rear","description":"\u003ch2\u003eOverview of National A-42 Axle Differential Bearing\u003c\/h2\u003e\u003cp\u003eThe National A-42 axle differential bearing is engineered for reliable driveline performance in a range of heavy-duty vehicles. Designed to meet precise specifications, this taper bearing set supports smooth axle operation in models from Chevrolet, GMC, Dodge, and more.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eIncludes taper bearing cone (Jlm506849a) and cup (Jlm506811)\u003c\/li\u003e\n\u003cli\u003eCone bore diameter: 2.1650 inches (54.9910 mm)\u003c\/li\u003e\n\u003cli\u003eCone length: 0.9060 inches (23.0120 mm)\u003c\/li\u003e\n\u003cli\u003eCone radius: 0.1400 inches (3.5560 mm)\u003c\/li\u003e\n\u003cli\u003eCup bore diameter: 3.5430 inches (89.9920 mm)\u003c\/li\u003e\n\u003cli\u003eCup length: 0.8070 inches (20.4980 mm)\u003c\/li\u003e\n\u003cli\u003eCup radius: 0.0200 inches (0.5080 mm)\u003c\/li\u003e\n\u003cli\u003eOverall width: 0.9843 inches (25.0000 mm)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTechnical Specifications and Compatibility\u003c\/h2\u003e\u003cp\u003eThe National A-42 bearing set is a precision taper bearing designed for axle differentials requiring exact fitment. Its cone and cup components are manufactured to tight tolerances, ensuring proper seating and load distribution. The cone bore of 2.1650 inches and cup bore of 3.5430 inches accommodate specific axle shaft dimensions commonly found in heavy-duty trucks and SUVs.\u003c\/p\u003e\u003cp\u003eThis bearing set is compatible with a wide range of vehicles, including Chevrolet Silverado 1500, 2500, and 3500 series, GMC Sierra models, Cadillac Escalade, Dodge Ram 1500 through 3500, Nissan NV series, Hummer H2, and various Suburban and Yukon models. The part number A-42 corresponds directly to these applications, providing a reliable replacement option for axle differential maintenance.\u003c\/p\u003e\u003ch2\u003eApplications and Problem Resolution\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eReplaces worn or damaged axle differential bearings in Chevrolet Silverado 2500 HD and GMC Sierra 3500 HD\u003c\/li\u003e\n\u003cli\u003eAddresses axle noise and vibration issues caused by bearing wear in Dodge Ram 2500 and 3500\u003c\/li\u003e\n\u003cli\u003eRestores proper differential function in Cadillac Escalade and Escalade ESV models\u003c\/li\u003e\n\u003cli\u003ePrevents premature axle shaft wear in Nissan NV1500 and NV3500 commercial chassis\u003c\/li\u003e\n\u003cli\u003eSupports smooth drivetrain operation in Hummer H2 and Chevrolet Avalanche 2500\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eEnsure proper cleaning of axle housing and differential components before installation\u003c\/li\u003e\n\u003cli\u003eUse appropriate tools to press the taper bearing cone and cup into place without damage\u003c\/li\u003e\n\u003cli\u003eVerify bearing preload and adjust shims as necessary to manufacturer specifications\u003c\/li\u003e\n\u003cli\u003eInspect mating surfaces for wear or damage prior to assembly\u003c\/li\u003e\n\u003cli\u003eConsult vehicle service manual for torque specifications and installation procedures\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eNational manufactures the A-42 axle differential bearing set to meet industry standards for durability and performance. Each 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 to support long-term reliability in compatible Chevrolet, GMC, Dodge, and Nissan vehicles.\u003c\/p\u003e","brand":"National","offers":[{"title":"Default Title","offer_id":43448399528117,"sku":"BCZK-A-42","price":66.65,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/NS_A42_Ang.jpg?v=1774734831","url":"https:\/\/www.partcatalog.com\/products\/national-a-42-axle-differential-bearing","provider":"PartCatalog","version":"1.0","type":"link"}