{"product_id":"national-340849-automatic-transmission-oil-pump-seal","title":"National 340849 Automatic Transmission Oil Pump Seal - Front","description":"\u003ch2\u003eOverview of National 340849 Automatic Transmission Oil Pump Seal\u003c\/h2\u003e\u003cp\u003eThe National 340849 automatic transmission oil pump seal is engineered to provide reliable sealing performance for select GM vehicles. Designed with precision nitrile material, this oil seal ensures durability and effective fluid retention in transmission systems of Buick, Cadillac, Chevrolet, Oldsmobile, and Pontiac models.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eInside diameter: 0.625 inch (15.880 mm)\u003c\/li\u003e\n\u003cli\u003eOutside diameter: 0.883 inch (22.430 mm)\u003c\/li\u003e\n\u003cli\u003eThickness: 0.093 inch (2.360 mm)\u003c\/li\u003e\n\u003cli\u003eSealing material: Nitrile for resistance to transmission fluids\u003c\/li\u003e\n\u003cli\u003eCompatible with housing bore size: 0.875 inch (22.230 mm)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Product Description and Specifications\u003c\/h2\u003e\u003cp\u003eThis National 340849 oil seal is part of the 340000 series, designed specifically for automatic transmission oil pumps. The seal’s nitrile construction offers excellent resistance to heat, oil, and wear, making it suitable for continuous operation within transmission assemblies. With an inside diameter of 0.625 inch and an outside diameter of 0.883 inch, it fits precisely on shafts and housing bores specified for Buick Century, Cadillac Cimarron, Chevrolet Citation, Oldsmobile Firenza, Pontiac Omega, Phoenix, Skyhawk, and Skylark models. The 0.093 inch thickness ensures a secure seal without compromising the pump’s mechanical function.\u003c\/p\u003e\u003ch2\u003eCompatible Vehicle Applications\u003c\/h2\u003e\u003cp\u003eThis oil pump seal is compatible with the following makes and models:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBuick Century\u003c\/li\u003e\n\u003cli\u003eCadillac Cimarron\u003c\/li\u003e\n\u003cli\u003eChevrolet Citation\u003c\/li\u003e\n\u003cli\u003eOldsmobile Firenza\u003c\/li\u003e\n\u003cli\u003ePontiac Omega, Phoenix, Skyhawk, Skylark\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eEnsure compatibility by verifying the transmission model and shaft dimensions before installation.\u003c\/p\u003e\u003ch2\u003eCommon Issues Addressed by the National 340849 Seal\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003ePrevents automatic transmission fluid leaks around the oil pump shaft\u003c\/li\u003e\n\u003cli\u003eReduces contamination ingress into the transmission system\u003c\/li\u003e\n\u003cli\u003eMaintains proper hydraulic pressure within the transmission\u003c\/li\u003e\n\u003cli\u003eMinimizes premature wear of transmission components due to fluid loss\u003c\/li\u003e\n\u003cli\u003eHelps avoid transmission overheating caused by fluid leakage\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eInspect the housing bore and shaft for wear or damage before installation\u003c\/li\u003e\n\u003cli\u003eClean all mating surfaces thoroughly to ensure proper sealing\u003c\/li\u003e\n\u003cli\u003eUse appropriate tools to press the seal evenly into the housing bore\u003c\/li\u003e\n\u003cli\u003eLubricate the seal lip with transmission fluid prior to installation to prevent damage\u003c\/li\u003e\n\u003cli\u003eVerify correct orientation of the seal to maintain fluid retention\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eQuality Assurance and Warranty Information\u003c\/h2\u003e\u003cp\u003eManufactured by National, a recognized brand in transmission sealing systems, the 340849 oil pump seal meets industry standards for material quality and dimensional accuracy. The nitrile material is selected for its compatibility with automatic transmission fluids and resistance to wear. While specific warranty details may vary, National typically offers coverage against manufacturing defects to ensure product reliability.\u003c\/p\u003e","brand":"National","offers":[{"title":"Default Title","offer_id":43448296374453,"sku":"BCZK-340849","price":15.3,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/NS_340849_Fro.jpg?v=1774734638","url":"https:\/\/www.partcatalog.com\/products\/national-340849-automatic-transmission-oil-pump-seal","provider":"PartCatalog","version":"1.0","type":"link"}