{"product_id":"national-253747-automatic-transmission-oil-pump-seal","title":"National 253747 Automatic Transmission Oil Pump Seal - Front","description":"\u003ch2\u003eOverview of National 253747 Automatic Transmission Oil Pump Seal\u003c\/h2\u003e\u003cp\u003eThe National 253747 automatic transmission oil pump seal is engineered to provide reliable sealing performance for select Chevrolet, Oldsmobile, and Pontiac models. Designed with durable nitrile material, this oil seal ensures effective containment of transmission fluid, helping maintain optimal transmission function.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eInside diameter: 0.625 inch (15.880 mm)\u003c\/li\u003e\n\u003cli\u003eOutside diameter: 0.880 inch (22.350 mm)\u003c\/li\u003e\n\u003cli\u003eThickness\/width: 0.125 inch (3.180 mm)\u003c\/li\u003e\n\u003cli\u003eSealing material: Nitrile for resistance to heat and transmission fluids\u003c\/li\u003e\n\u003cli\u003eCompatible housing bore: 0.875 inch (22.230 mm)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTechnical Details and Specifications\u003c\/h2\u003e\u003cp\u003eThis National automatic transmission oil pump seal (part number 253747) is constructed from nitrile, a synthetic rubber known for its resistance to oil, heat, and wear. The seal features a 0.625 inch (15.880 mm) inside diameter and a 0.880 inch (22.350 mm) outside diameter, with a thickness of 0.125 inch (3.180 mm). It is designed to fit a housing bore of 0.875 inch (22.230 mm), making it suitable for precise sealing applications in automatic transmission oil pumps.\u003c\/p\u003e\u003ch2\u003eCompatible Vehicle Applications\u003c\/h2\u003e\u003cp\u003eThis oil pump seal is compatible with various Chevrolet, Oldsmobile, and Pontiac vehicles, including models such as the Chevrolet Cavalier, Oldsmobile Cutlass Ciera, Pontiac Fiero, Firenza, Celebrity, J2000, and J2000 Sunbird. Using the National 253747 seal helps maintain proper transmission fluid containment and prevents leaks in these specific vehicle models.\u003c\/p\u003e\u003ch2\u003eCommon Issues Addressed by This Oil Pump Seal\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003ePrevents automatic transmission fluid leaks around the oil pump shaft\u003c\/li\u003e\n\u003cli\u003eReduces risk of transmission overheating due to fluid loss\u003c\/li\u003e\n\u003cli\u003eMaintains proper hydraulic pressure within the transmission system\u003c\/li\u003e\n\u003cli\u003eMinimizes contamination ingress into the transmission fluid\u003c\/li\u003e\n\u003cli\u003eHelps avoid premature transmission wear and failure\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eEnsure the housing bore and shaft dimensions match the seal specifications before installation\u003c\/li\u003e\n\u003cli\u003eClean the sealing surfaces thoroughly to remove debris and old sealant\u003c\/li\u003e\n\u003cli\u003eLubricate the seal lip with transmission fluid prior to installation to prevent damage\u003c\/li\u003e\n\u003cli\u003ePress the seal evenly into the housing bore to avoid distortion\u003c\/li\u003e\n\u003cli\u003eVerify proper seating and alignment to ensure effective sealing\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eNational transmission seals are manufactured to meet industry standards for durability and performance. The 253747 oil pump seal is made from high-quality nitrile material to withstand exposure to transmission fluids and operating temperatures. While specific warranty details may vary, National products typically come with a limited warranty against manufacturing defects to provide confidence in product reliability.\u003c\/p\u003e","brand":"National","offers":[{"title":"Default Title","offer_id":43448294277301,"sku":"BCZK-253747","price":17.66,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/NS_253747_Fro_8b946982-2175-46ca-b1da-42c58cb5a59e.jpg?v=1774734631","url":"https:\/\/www.partcatalog.com\/products\/national-253747-automatic-transmission-oil-pump-seal","provider":"PartCatalog","version":"1.0","type":"link"}