{"product_id":"national-31520-differential-pinion-race","title":"National 31520 Differential Pinion Race - Front Inner, Rear Inner or Rear Outer","description":"\u003ch2\u003eOverview of National 31520 Differential Pinion Race\u003c\/h2\u003e\u003cp\u003eThe National 31520 differential pinion race is engineered for reliable driveline performance in a variety of vehicles including Chevrolet Blazer, Ford F-150, and Jeep Wrangler models. This taper bearing cup is designed to meet precise specifications, ensuring proper fit and function in your vehicle's differential assembly.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCompatible with Chevrolet, Dodge, Ford, GMC, Jeep, and Pontiac vehicles\u003c\/li\u003e\n\u003cli\u003eFits models such as Blazer, Bronco, F-100, F-150, Grand Wagoneer, and Wrangler\u003c\/li\u003e\n\u003cli\u003ePart number 31520 for accurate identification\u003c\/li\u003e\n\u003cli\u003eCup bore diameter of 3.0000 inches (76.2 mm)\u003c\/li\u003e\n\u003cli\u003eCup length of 0.9375 inches (23.813 mm) with a cup radius of 0.1250 inches (3.175 mm)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTechnical Specifications and Design Details\u003c\/h2\u003e\u003cp\u003eThe National 31520 differential pinion race features a taper bearing cup design with a cup bore measuring 3.0000 inches (76.2 mm) in diameter. The cup length is precisely 0.9375 inches (23.813 mm), providing a secure seating surface for the pinion bearing. The cup radius of 0.1250 inches (3.175 mm) ensures proper alignment and load distribution within the differential assembly. These dimensions are critical for maintaining the integrity and smooth operation of the driveline components in vehicles such as the Ford F-250 HD and Chevrolet C10 Suburban.\u003c\/p\u003e\u003ch2\u003eApplications and Problem Solving\u003c\/h2\u003e\u003cp\u003eThis differential pinion race is used primarily in the differential assembly to support the pinion bearing and maintain proper gear alignment. It addresses several common issues including:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eWear and tear on the original pinion race causing noise or vibration\u003c\/li\u003e\n\u003cli\u003eImproper bearing seating leading to premature bearing failure\u003c\/li\u003e\n\u003cli\u003eExcessive play in the differential pinion gear\u003c\/li\u003e\n\u003cli\u003eReplacement during differential rebuilds or upgrades\u003c\/li\u003e\n\u003cli\u003eRestoring factory specifications in Chevrolet Blazer and Jeep Cherokee differentials\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eWhen installing the National 31520 differential pinion race, ensure the following:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eClean the differential housing bore thoroughly before installation\u003c\/li\u003e\n\u003cli\u003eUse proper tools to press the race evenly into place without damage\u003c\/li\u003e\n\u003cli\u003eVerify the cup bore and length dimensions match the vehicle’s specifications\u003c\/li\u003e\n\u003cli\u003eCheck bearing preload and gear mesh after installation\u003c\/li\u003e\n\u003cli\u003eConsult vehicle-specific service manuals for torque and assembly procedures\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eNational manufactures the 31520 differential pinion race to meet industry standards for durability and precision. This part 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 provide confidence in the product’s performance for Chevrolet, Dodge, Ford, GMC, Jeep, and Pontiac applications.\u003c\/p\u003e","brand":"National","offers":[{"title":"Default Title","offer_id":43448261869749,"sku":"BCZK-31520","price":20.26,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/NS_31520_Ang_8acf9a18-0187-43dd-a60d-f4a7bf563692.jpg?v=1774734578","url":"https:\/\/www.partcatalog.com\/products\/national-31520-differential-pinion-race","provider":"PartCatalog","version":"1.0","type":"link"}