{"product_id":"skf-uj391-universal-joint","title":"SKF UJ391 Universal Joint","description":"\u003ch2\u003eOverview of SKF UJ391 Universal Joint for Nissan Vehicles\u003c\/h2\u003e\u003cp\u003eThe SKF UJ391 universal joint is engineered to provide reliable driveline performance for Nissan models including the 510, 720, and D21. Designed with precision, this universal joint ensures smooth power transfer and durability in demanding driving conditions.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCompatible with Nissan 510, 720, and D21 models\u003c\/li\u003e\n\u003cli\u003eFeatures (4) grooved round bearing caps for secure fitment\u003c\/li\u003e\n\u003cli\u003eUtilizes UJ type bearing for optimal driveline articulation\u003c\/li\u003e\n\u003cli\u003eBearing cap axis diameter measures 0.985 inches for precise alignment\u003c\/li\u003e\n\u003cli\u003eDurable construction designed to withstand driveline stresses\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Product Description and Attributes\u003c\/h2\u003e\u003cp\u003eThe SKF UJ391 universal joint is a critical component in the driveline and axles category, specifically designed as a drive shaft universal joint. It incorporates four grooved round bearing caps that provide a secure and stable connection, reducing the risk of slippage or misalignment during operation. The bearing type is classified as UJ, which is standard for universal joints requiring smooth rotational movement and flexibility. The bearing cap axis diameter of 0.985 inches ensures compatibility with the corresponding drive shaft components, maintaining proper fit and function. This part number UJ391 is manufactured by SKF, a recognized brand in automotive driveline components, ensuring consistent quality and performance.\u003c\/p\u003e\u003ch2\u003eApplications and Problem Solving\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eReplaces worn or damaged universal joints in Nissan 510, 720, and D21 drive shafts\u003c\/li\u003e\n\u003cli\u003eAddresses driveline vibrations caused by faulty or loose universal joints\u003c\/li\u003e\n\u003cli\u003ePrevents drivetrain binding and uneven power transfer\u003c\/li\u003e\n\u003cli\u003eEliminates noise and play in the drive shaft assembly\u003c\/li\u003e\n\u003cli\u003eRestores proper driveline articulation for improved vehicle handling\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eWhen installing the SKF UJ391 universal joint, ensure the bearing caps are properly aligned with the grooved round design to secure the joint firmly. Verify the bearing cap axis diameter matches the drive shaft specifications to avoid fitment issues. It is recommended to inspect the drive shaft yokes and related components for wear before installation. Proper lubrication and torque specifications should be followed according to Nissan service guidelines for the 510, 720, and D21 models to ensure optimal performance and longevity.\u003c\/p\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eSKF manufactures the UJ391 universal joint under strict quality control standards to meet OEM specifications. The part is designed for durability and consistent performance in Nissan driveline applications. While specific warranty details may vary, SKF typically offers coverage against manufacturing defects, providing confidence in the reliability of this universal joint for Nissan 510, 720, and D21 vehicles.\u003c\/p\u003e","brand":"SKF","offers":[{"title":"Default Title","offer_id":43739560509621,"sku":"BCNB-UJ391","price":20.92,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/CR_UJ391_Ang.jpg?v=1774993693","url":"https:\/\/www.partcatalog.com\/products\/skf-uj391-universal-joint","provider":"PartCatalog","version":"1.0","type":"link"}