{"product_id":"national-305-manual-transmission-countershaft-bearing","title":"National 305 Manual Transmission Countershaft Bearing","description":"\u003ch2\u003eOverview of National 305 Manual Transmission Countershaft Bearing\u003c\/h2\u003e\u003cp\u003eThe National 305 manual transmission countershaft bearing is engineered for reliable performance in a variety of vehicles including BMW, Honda, Nissan, and Ford models. Designed as a single row radial ball bearing, it supports smooth countershaft rotation and helps maintain transmission efficiency.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSingle row radial design for consistent load handling\u003c\/li\u003e\n\u003cli\u003eBore diameter of 0.984 inches (25 mm) for precise fitment\u003c\/li\u003e\n\u003cli\u003eOuter diameter of 2.441 inches (62 mm) ensuring compatibility with multiple transmissions\u003c\/li\u003e\n\u003cli\u003eWidth of 0.669 inches (17 mm) for optimal space utilization\u003c\/li\u003e\n\u003cli\u003eInner and outer race radii of 0.040 inches (1.02 mm) for durability and reduced wear\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTechnical Specifications and Design Details\u003c\/h2\u003e\u003cp\u003eThis National 305 bearing features a ball bearing design with a 25 mm inner race bore, making it suitable for manual transmission countershafts in vehicles such as the BMW 528i, Honda Accord, Nissan 240SX, and Ford Ranger. The single row radial construction supports radial loads effectively, while the precise dimensions—0.669 inch width and 2.441 inch outer diameter—ensure proper alignment and fit within the transmission assembly. The inner and outer race radii of 0.040 inches contribute to the bearing's ability to withstand operational stresses and extend service life.\u003c\/p\u003e\u003ch2\u003eCompatible Vehicles and Applications\u003c\/h2\u003e\u003cp\u003eThis part number 305 is compatible with a wide range of makes and models, including but not limited to:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBMW 528e, 530i, 535i, M3, and 635CSi\u003c\/li\u003e\n\u003cli\u003eHonda Accord, Civic, CR-Z, and Prelude\u003c\/li\u003e\n\u003cli\u003eNissan 200SX, 240SX, 280ZX, and Maxima\u003c\/li\u003e\n\u003cli\u003eFord Ranger, Courier, and Pickup\u003c\/li\u003e\n\u003cli\u003eOther models from Chevrolet, Geo, GMC, INFINITI, Mazda, Mercedes-Benz, Pontiac, Subaru, and Suzuki\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCommon Issues Addressed by the National 305 Bearing\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eExcessive transmission noise due to worn or damaged countershaft bearings\u003c\/li\u003e\n\u003cli\u003eVibration and rough shifting caused by bearing play or failure\u003c\/li\u003e\n\u003cli\u003ePremature wear of transmission components from improper bearing support\u003c\/li\u003e\n\u003cli\u003eOverheating and increased friction within the manual transmission assembly\u003c\/li\u003e\n\u003cli\u003eReduced transmission efficiency and potential gear misalignment\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eWhen installing the National 305 manual transmission countershaft bearing, ensure the transmission is clean and free of debris. Use proper tools to press the bearing into place without applying excessive force that could damage the races. Verify the bearing orientation matches the original setup, and lubricate according to manufacturer specifications. It is recommended to inspect related transmission components for wear during installation to prevent future issues.\u003c\/p\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eNational bearings are manufactured to meet industry standards for durability and precision. The 305 bearing undergoes rigorous quality control to ensure dimensional accuracy and material integrity. While specific warranty details may vary, National typically offers coverage against manufacturing defects to provide confidence in the product's reliability for manual transmission applications.\u003c\/p\u003e","brand":"National","offers":[{"title":"Default Title","offer_id":43446450258101,"sku":"BCZK-305","price":45.78,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/NS_305_Ang_e6f9290c-9cc9-401e-bf9c-234fafdf8e86.jpg?v=1774734488","url":"https:\/\/www.partcatalog.com\/products\/national-305-manual-transmission-countershaft-bearing","provider":"PartCatalog","version":"1.0","type":"link"}