{"product_id":"national-711112-transfer-case-input-shaft-seal","title":"National 711112 Transfer Case Input Shaft Seal - Left","description":"\u003ch2\u003eOverview of National Transfer Case Input Shaft Seal 711112\u003c\/h2\u003e\u003cp\u003eThe National Transfer Case Input Shaft Seal 711112 is engineered to provide reliable sealing performance for transfer cases in select GM vehicles. Designed with a bi-directional lip and constructed from durable fluoro-elastomer material, this oil seal helps maintain optimal transfer case function in Buick, Chevrolet, GMC, Pontiac, and Saturn models.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eFlanged outside diameter: 2.421 inches (61.5 mm)\u003c\/li\u003e\n\u003cli\u003eHousing bore diameter: 2.285 inches (58.05 mm)\u003c\/li\u003e\n\u003cli\u003eOutside diameter: 2.293 inches (58.25 mm)\u003c\/li\u003e\n\u003cli\u003eShaft diameter compatibility: 1.772 inches (45 mm)\u003c\/li\u003e\n\u003cli\u003eSeal width: 0.486 inches (12.35 mm)\u003c\/li\u003e\n\u003cli\u003eBi-directional lip design for effective sealing\u003c\/li\u003e\n\u003cli\u003eConstructed from fluoro-elastomer for chemical and temperature resistance\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Product Description\u003c\/h2\u003e\u003cp\u003eThe National 711112 transfer case input shaft seal is specifically designed to fit transfer cases in various GM vehicles including Buick Acadia, Chevrolet Equinox, GMC Terrain, Pontiac Torrent, and Saturn Vue. Its bi-directional lip design ensures effective sealing against oil leaks in both rotational directions, which is critical for maintaining transfer case integrity. The fluoro-elastomer material offers enhanced resistance to heat, oil, and other automotive fluids, extending the service life of the seal under demanding conditions.\u003c\/p\u003e\u003cp\u003eWith precise dimensions such as a 2.421-inch flanged outside diameter and a 1.772-inch shaft diameter, this seal fits securely within the housing bore of 2.285 inches, ensuring a tight and reliable fit. The 0.486-inch width provides adequate sealing surface area without compromising installation space.\u003c\/p\u003e\u003ch2\u003eApplications and Common Issues Addressed\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003ePrevents oil leaks from the transfer case input shaft\u003c\/li\u003e\n\u003cli\u003eReduces contamination ingress that can damage transfer case components\u003c\/li\u003e\n\u003cli\u003eHelps maintain proper lubrication within the transfer case\u003c\/li\u003e\n\u003cli\u003eAddresses wear-related seal failures in Buick Acadia and Chevrolet Equinox transfer cases\u003c\/li\u003e\n\u003cli\u003eReplaces degraded seals in GMC Terrain and Pontiac Torrent models to restore transfer case performance\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eEnsure the transfer case housing bore is clean and free of debris before installation\u003c\/li\u003e\n\u003cli\u003eUse appropriate tools to press the seal evenly into the housing bore to avoid damage\u003c\/li\u003e\n\u003cli\u003eVerify shaft and bore dimensions match the seal specifications for proper fit\u003c\/li\u003e\n\u003cli\u003eLubricate the seal lip lightly with compatible oil prior to installation to reduce initial wear\u003c\/li\u003e\n\u003cli\u003eInspect the transfer case input shaft for wear or damage before installing the new seal\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eNational transfer case input shaft seals are manufactured to meet OEM specifications for fit and function. The fluoro-elastomer material and bi-directional lip design contribute to consistent sealing performance under typical operating conditions. Part number 711112 is part of the National 711100 series, known for its durability and reliability in transfer case sealing applications. Warranty coverage details should be confirmed with the original equipment manufacturer or distributor.\u003c\/p\u003e","brand":"National","offers":[{"title":"Default Title","offer_id":43448382161077,"sku":"BCZK-711112","price":26.47,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/NS_711112_Ang_aea717b4-0b53-40e1-9b9b-db9b96df8314.jpg?v=1774734817","url":"https:\/\/www.partcatalog.com\/products\/national-711112-transfer-case-input-shaft-seal","provider":"PartCatalog","version":"1.0","type":"link"}