{"product_id":"national-a4138-steering-gear-worm-shaft-race","title":"National A4138 Steering Gear Worm Shaft Race","description":"\u003ch2\u003eSteering Gear Worm Shaft Race\u003c\/h2\u003e\u003cp\u003eNational A4138 is a taper bearing cup for steering gear applications that require a precise race surface and consistent load support. It is built for manual steering systems and listed across a wide range of classic Chrysler, Dodge, DeSoto, Plymouth, and Fiat applications.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003ePremium-grade steel construction for durable bearing support.\u003c\/li\u003e\n\u003cli\u003eCrowned raceways promote even load distribution across the bearing surface.\u003c\/li\u003e\n\u003cli\u003eTaper bearing cup design for steering gear worm shaft service.\u003c\/li\u003e\n\u003cli\u003eFits manual steering applications listed for multiple classic vehicle platforms.\u003c\/li\u003e\n\u003cli\u003eNational A4138 part number for straightforward identification and ordering.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eThis National taper bearing cup is engineered as a steering gear worm shaft race with a 1.3775-inch cup bore, 0.3437-inch cup length, and 0.0460-inch cup radius. The crowned raceway profile helps distribute load evenly, while the premium steel construction supports the demands of steering gear service. National A4138 is used in manual steering applications across Chrysler Imperial, Dodge Coronet, and Plymouth Suburban fitments, along with additional classic makes and models.\u003c\/p\u003e\u003cp\u003eNational A4138 cross-references 64AX167 and 96XA4138 for the same application.\u003c\/p\u003e\u003ch2\u003eWhat It Is Used For\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eReplacing a worn or pitted steering gear bearing race.\u003c\/li\u003e\n\u003cli\u003eRestoring smooth bearing contact in manual steering gear assemblies.\u003c\/li\u003e\n\u003cli\u003eAddressing steering looseness caused by race surface wear.\u003c\/li\u003e\n\u003cli\u003eSupporting proper load transfer in taper bearing setups.\u003c\/li\u003e\n\u003cli\u003eServicing classic steering gear components on older Chrysler, Dodge, DeSoto, Plymouth, and Fiat vehicles.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eVerify the cup bore, cup length, and cup radius before installation. This part is listed for manual steering applications, and fitment notes specify taper bearing set use with cup and cone. Match the application details exactly to the vehicle and steering gear configuration before assembly.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eNational manufactures this taper bearing cup with premium-grade steel and crowned raceways to support even load distribution in steering gear service.\u003c\/p\u003e","brand":"National","offers":[{"title":"Default Title","offer_id":53505773371573,"sku":"BCZK-A4138","price":26.27,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/NS_A4138_Ang.jpg?v=1791700948","url":"https:\/\/www.partcatalog.com\/products\/national-a4138-steering-gear-worm-shaft-race","provider":"PartCatalog","version":"1.0","type":"link"}