{"product_id":"national-711121-transfer-case-output-shaft-seal-left","title":"National 711121 Transfer Case Output Shaft Seal - Left","description":"\u003ch2\u003eOverview of National Transfer Case Output Shaft Seal 711121\u003c\/h2\u003e\u003cp\u003eThe National 711121 transfer case output shaft seal is engineered to provide reliable sealing performance for select Ford, Land Rover, Mercury, and Volvo vehicles. Designed with a bi-directional lip, this oil seal helps maintain proper lubrication and prevent fluid leaks in the transfer case assembly.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBi-directional lip design for effective sealing in both rotational directions\u003c\/li\u003e\n\u003cli\u003eConstructed from durable polyacrylate material for resistance to heat and wear\u003c\/li\u003e\n\u003cli\u003eHousing bore diameter of 2.559 inches (65.000 mm) ensures precise fit\u003c\/li\u003e\n\u003cli\u003eOutside diameter measures 2.567 inches (65.200 mm) for compatibility with specified transfer cases\u003c\/li\u003e\n\u003cli\u003eOverall width with side lip is 0.370 inches (9.400 mm) for secure installation\u003c\/li\u003e\n\u003cli\u003eShaft diameter of 1.890 inches (48.000 mm) matches OEM specifications\u003c\/li\u003e\n\u003cli\u003ePart of the National 711100 series, known for consistent quality in sealing systems\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Product Description\u003c\/h2\u003e\u003cp\u003eThe National 711121 transfer case output shaft seal is designed to meet the exacting standards required for transfer case applications in vehicles such as the Ford Five Hundred, Land Rover Discovery Sport, Mercury Montego, and Volvo XC90. Its bi-directional lip design provides a reliable seal against oil leakage regardless of shaft rotation direction, which is critical for maintaining transfer case integrity and performance.\u003c\/p\u003e\u003cp\u003eManufactured from polyacrylate, this seal offers excellent resistance to heat, oil, and wear, extending the service life of the transfer case components. The precise dimensions, including a housing bore of 2.559 inches and an outside diameter of 2.567 inches, ensure a snug fit that prevents contamination and fluid loss. The overall width with side lip of 0.370 inches supports proper sealing pressure and installation stability.\u003c\/p\u003e\u003ch2\u003eApplications and Common Issues Addressed\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003ePrevents oil leaks from the transfer case output shaft\u003c\/li\u003e\n\u003cli\u003eReduces risk of transfer case contamination by dirt and debris\u003c\/li\u003e\n\u003cli\u003eHelps maintain proper lubrication for transfer case components\u003c\/li\u003e\n\u003cli\u003eAddresses wear-related seal failures in Ford, Land Rover, Mercury, and Volvo models\u003c\/li\u003e\n\u003cli\u003eSupports transfer case performance in vehicles like the Range Rover Evoque and Volvo S60\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eWhen installing the National 711121 transfer case output shaft seal, ensure the housing bore and shaft dimensions match the specified measurements for a proper fit. Clean the sealing surface thoroughly to remove any debris or old sealant. Use appropriate tools to press the seal evenly into place without damaging the lip. Verify the seal orientation to maintain the bi-directional lip’s effectiveness.\u003c\/p\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eNational transfer case seals, including part number 711121, are manufactured to meet industry standards for durability and performance. The polyacrylate material and precise engineering contribute to consistent sealing reliability. While specific warranty details are not provided, National products typically adhere to quality control processes to ensure customer satisfaction and part longevity.\u003c\/p\u003e","brand":"National","offers":[{"title":"Default Title","offer_id":51931953004725,"sku":"BCZK-711121","price":18.44,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/NS_711121_Ang.jpg?v=1774734818","url":"https:\/\/www.partcatalog.com\/products\/national-711121-transfer-case-output-shaft-seal-left","provider":"PartCatalog","version":"1.0","type":"link"}