{"product_id":"national-387a-automatic-transmission-differential-bearing","title":"National 387A Automatic Transmission Differential Bearing","description":"\u003ch2\u003eOverview of National 387A Automatic Transmission Differential Bearing\u003c\/h2\u003e\u003cp\u003eThe National 387A is a precision-engineered automatic transmission differential bearing designed for reliable performance in a range of vehicles including Cadillac, Chevrolet, Dodge, Ford, GMC, Jeep, Land Rover, Oldsmobile, and Plymouth models. This taper bearing cone is built to exact specifications to ensure proper fit and function in your transmission system.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCone bore diameter: 2.2500 inches (57.15 mm)\u003c\/li\u003e\n\u003cli\u003eCone length: 0.8640 inches (21.946 mm)\u003c\/li\u003e\n\u003cli\u003eCone radius: 0.1400 inches (3.556 mm)\u003c\/li\u003e\n\u003cli\u003ePart type: Taper bearing cone for automatic transmission differential\u003c\/li\u003e\n\u003cli\u003eCompatible with multiple truck and SUV models including Chevrolet Blazer, Ford F-250, Dodge Ram 3500, and Land Rover Range Rover Sport\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Product Description\u003c\/h2\u003e\u003cp\u003eThe National 387A automatic transmission differential bearing features a taper bearing cone designed to fit precisely within the transmission assembly. With a cone bore of 2.2500 inches (57.15 mm) and a cone length of 0.8640 inches (21.946 mm), this bearing supports smooth rotational movement and reduces friction within the differential. The cone radius of 0.1400 inches (3.556 mm) ensures proper seating and alignment, critical for maintaining transmission integrity under load. This part is engineered to meet OEM specifications, making it suitable for use in a variety of vehicles such as the Chevrolet C10 Suburban, Ford F-350 Super Duty, Dodge Challenger, and Jeep Jimmy.\u003c\/p\u003e\u003ch2\u003eCompatible Vehicles and Applications\u003c\/h2\u003e\u003cp\u003eThis National 387A bearing is compatible with a broad range of makes and models, including but not limited to:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCadillac Eldorado and XLR\u003c\/li\u003e\n\u003cli\u003eChevrolet Blazer, Colorado, Corvette, and C3500\u003c\/li\u003e\n\u003cli\u003eDodge Challenger, Charger, Ram 2500, and Ram 3500 Van\u003c\/li\u003e\n\u003cli\u003eFord F-100, F-250 HD, F-350 Super Duty, E-250 Econoline, and Excursion\u003c\/li\u003e\n\u003cli\u003eGMC Canyon, Jimmy, and Sierra models\u003c\/li\u003e\n\u003cli\u003eJeep models including the LR3 and LR4\u003c\/li\u003e\n\u003cli\u003eLand Rover Range Rover Sport and P3500\u003c\/li\u003e\n\u003cli\u003eOldsmobile Toronado and Plymouth models\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCommon Issues Addressed by the National 387A Bearing\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eExcessive transmission noise due to worn differential bearings\u003c\/li\u003e\n\u003cli\u003eVibration or rough shifting caused by bearing misalignment\u003c\/li\u003e\n\u003cli\u003ePremature bearing wear from improper fit or damaged components\u003c\/li\u003e\n\u003cli\u003eTransmission overheating linked to increased friction in the differential\u003c\/li\u003e\n\u003cli\u003eReduced drivetrain efficiency resulting from bearing failure\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eEnsure the transmission differential housing is clean and free of debris before installation\u003c\/li\u003e\n\u003cli\u003eVerify the cone bore and length measurements match the OEM specifications for your vehicle\u003c\/li\u003e\n\u003cli\u003eUse proper tools to press the bearing cone into place without damaging the taper surface\u003c\/li\u003e\n\u003cli\u003eCheck for smooth rotation and correct seating after installation\u003c\/li\u003e\n\u003cli\u003eConsult the vehicle’s service manual for torque specifications and assembly procedures\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eNational bearings are manufactured to meet stringent quality standards, ensuring durability and consistent performance. The 387A automatic transmission differential bearing undergoes rigorous inspection to comply with OEM tolerances. While specific warranty details may vary, National typically offers coverage against manufacturing defects to provide confidence in the product’s reliability.\u003c\/p\u003e","brand":"National","offers":[{"title":"Default Title","offer_id":43446458908853,"sku":"BCZK-387A","price":33.06,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/NS_387A_Ang.jpg?v=1774734491","url":"https:\/\/www.partcatalog.com\/products\/national-387a-automatic-transmission-differential-bearing","provider":"PartCatalog","version":"1.0","type":"link"}