{"product_id":"national-100727-differential-pinion-seal","title":"National 100727 Differential Pinion Seal - Rear Outer","description":"\u003ch2\u003eNational Differential Pinion Seal 100727 Overview\u003c\/h2\u003e\u003cp\u003eThe National Differential Pinion Seal 100727 is engineered for reliable sealing performance in heavy-duty driveline applications. Designed specifically for Chevrolet, Dodge, and GMC trucks, this oil seal ensures proper containment of lubricants in the differential pinion area, helping maintain optimal drivetrain function.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eInside diameter: 2.500 inches (63.5 mm)\u003c\/li\u003e\n\u003cli\u003eOutside diameter: 4.042 inches (102.67 mm)\u003c\/li\u003e\n\u003cli\u003eFlanged outside diameter: 4.331 inches (110 mm)\u003c\/li\u003e\n\u003cli\u003eThickness: 0.492 inches (12.5 mm)\u003c\/li\u003e\n\u003cli\u003eMaterial: Durable fluoro-elastomer for enhanced resistance to heat and chemicals\u003c\/li\u003e\n\u003cli\u003eCompatible with Chevrolet Silverado 3500, GMC Sierra 3500 and Sierra 3500 Classic, Dodge Ram 2500 and Ram 3500\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTechnical Details and Specifications\u003c\/h2\u003e\u003cp\u003eThis National differential pinion seal features a precise inside diameter of 2.500 inches (63.5 mm) to fit the pinion shaft securely, while the outside diameter measures 4.042 inches (102.67 mm) to match the housing bore. The flanged outside diameter of 4.331 inches (110 mm) provides additional sealing surface and stability within the differential housing. With a thickness of 0.492 inches (12.5 mm), the seal offers a robust barrier against oil leaks. Constructed from fluoro-elastomer, the seal resists degradation from heat, oil, and other automotive fluids, ensuring long service life under demanding conditions.\u003c\/p\u003e\u003ch2\u003eCompatible Vehicles and Applications\u003c\/h2\u003e\u003cp\u003eThis differential pinion seal is compatible with select heavy-duty trucks, including Chevrolet Silverado 3500, GMC Sierra 3500 and Sierra 3500 Classic, as well as Dodge Ram 2500 and Ram 3500 models. It is designed to maintain proper sealing in the differential pinion area, preventing lubricant leaks and protecting drivetrain components from contamination.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003ePrevents oil leaks in differential pinion area\u003c\/li\u003e\n\u003cli\u003eProtects against dirt and debris intrusion\u003c\/li\u003e\n\u003cli\u003eMaintains proper lubrication for differential gears\u003c\/li\u003e\n\u003cli\u003eReduces risk of drivetrain damage due to seal failure\u003c\/li\u003e\n\u003cli\u003eHelps maintain vehicle performance and reliability\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eWhen installing the National differential pinion seal 100727, ensure the housing bore is clean and free of debris. Use appropriate tools to press the seal evenly into place without damaging the fluoro-elastomer material. Verify the seal’s orientation matches the original part to maintain proper sealing function. Lubricate the seal lip lightly with gear oil before installation to reduce initial wear. Follow vehicle-specific service manual instructions for torque specifications and installation procedures.\u003c\/p\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eNational manufactures this differential pinion seal to meet industry standards for durability and performance. The fluoro-elastomer material provides resistance to heat and chemical exposure typical in driveline environments. Part number 100727 is backed by National’s quality control processes to ensure consistent fit and function. Warranty coverage details should be confirmed with the original equipment manufacturer or distributor.\u003c\/p\u003e","brand":"National","offers":[{"title":"Default Title","offer_id":43448278188213,"sku":"BCZK-100727","price":26.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/NS_100727_Fro.jpg?v=1774734604","url":"https:\/\/www.partcatalog.com\/products\/national-100727-differential-pinion-seal","provider":"PartCatalog","version":"1.0","type":"link"}