{"product_id":"crane-axle-40-spline-rear-spindle-and-hub-assembly-pair","title":"Crane Axle GM 14-Bolt 40-Spline Spindle \u0026 Aluminum Hub Kit","description":"\u003cp\u003eThe \u003cstrong\u003eCrane Axle GM 14-Bolt 40-Spline Spindle \u0026amp; Aluminum Hub Kit\u003c\/strong\u003e combines our heavy-duty 4140 chromoly rear spindles, 6061 billet aluminum wheel hubs, Timken wheel bearings, seals, spindle hardware, and spacers into one matched wheel-end package for serious 40-spline rear axle builds. Rather than adapting factory 14-Bolt wheel-end components, this system is purpose-built around the larger Crane Axle 40-spline spindle and hub configuration.\u003c\/p\u003e\n\n\u003cp\u003eDesigned for rock bouncers, competition crawlers, Ultra4 cars, high-horsepower trail rigs, and custom fabricated axles, the system increases spindle strength and axle shaft capacity while using lightweight aluminum hubs to reduce rotating and unsprung mass. The 3.00\" O.D. spindle body can also be machined for smaller axle tube bores, giving builders flexibility when incorporating the system into GM 14-Bolt, Dana, or fabricated axle housings.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIncludes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e(2) Crane Axle 4140 Chromoly 40-Spline Rear Spindles\u003c\/li\u003e\n\u003cli\u003e(4) 40-Spline Spindle Nuts\u003c\/li\u003e\n\u003cli\u003e(2) Spindle Nut Retaining Dowels\u003c\/li\u003e\n\u003cli\u003e(2) Crane Axle GM 14-Bolt 40-Spline 6061 Billet Aluminum Wheel Hubs\u003c\/li\u003e\n\u003cli\u003e(2) Timken Inner Wheel Bearings \u0026amp; Races\u003c\/li\u003e\n\u003cli\u003e(2) Timken Outer Wheel Bearings \u0026amp; Races\u003c\/li\u003e\n\u003cli\u003e(2) Wheel Seals\u003c\/li\u003e\n\u003cli\u003e(2) Bearing Spacers\u003c\/li\u003e\n\u003cli\u003e(2) Bearing Retaining Snap Rings\u003c\/li\u003e\n\u003cli\u003e(2) 40-Spline Spindle Spacers\u003c\/li\u003e\n\u003cli\u003eBearing Races Pre-Installed in Aluminum Hubs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003cdetails class=\"details\"\u003e\n\u003csummary\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003cspan class=\"svg-wrapper icon-plus\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" fill=\"none\" viewbox=\"0 0 14 14\" height=\"14\" width=\"14\"\u003e\u003cpath stroke-linecap=\"round\" stroke-width=\"var(--icon-stroke-width)\" stroke=\"currentColor\" d=\"M2.75 7H11.25\" class=\"vertical\"\u003e\u003c\/path\u003e\u003cpath stroke-linecap=\"round\" stroke-width=\"var(--icon-stroke-width)\" stroke=\"currentColor\" d=\"M7 2.75L7 11.25\" class=\"horizontal\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/span\u003e\u003c\/summary\u003e\n\n\u003cdiv class=\"details-content rte\"\u003e\n\n\u003ctable class=\"custom-specs-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eCrane Axle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAxle Platform\u003c\/td\u003e\n\u003ctd\u003eGM 14-Bolt \/ Custom Fabricated Rear Axles\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWheel-End System\u003c\/td\u003e\n\u003ctd\u003eCrane Axle 40-Spline Rear Spindle System\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAxle Shaft Spline Count\u003c\/td\u003e\n\u003ctd\u003e40-Spline\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpindle Material\u003c\/td\u003e\n\u003ctd\u003e4140 Chromoly Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpindle Heat Treatment\u003c\/td\u003e\n\u003ctd\u003eHeat Treated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpindle Bearing Surfaces\u003c\/td\u003e\n\u003ctd\u003ePrecision Finish-Ground\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpindle Outside Diameter\u003c\/td\u003e\n\u003ctd\u003e3.00\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum Machinable Spindle Diameter\u003c\/td\u003e\n\u003ctd\u003e2.00\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpindle Weld Area\u003c\/td\u003e\n\u003ctd\u003eExtended Weld Surface\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHub Material\u003c\/td\u003e\n\u003ctd\u003e6061 Billet Aluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHub Finish\u003c\/td\u003e\n\u003ctd\u003eMachined Aluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBearing Manufacturer\u003c\/td\u003e\n\u003ctd\u003eTimken\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBearing Type\u003c\/td\u003e\n\u003ctd\u003eTapered Roller\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBearing Races\u003c\/td\u003e\n\u003ctd\u003eIncluded \/ Pre-Installed in Hubs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWheel Seals\u003c\/td\u003e\n\u003ctd\u003eIncluded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAxle Position\u003c\/td\u003e\n\u003ctd\u003eRear \/ Non-Steering\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation Type\u003c\/td\u003e\n\u003ctd\u003eCustom Axle Fabrication \/ Assembly Required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003eComplete Pair \/ Both Rear Wheel Ends\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturing\u003c\/td\u003e\n\u003ctd\u003eSpindles \u0026amp; Hubs Machined in the USA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003chr\u003e\n\n\u003cdetails class=\"details\"\u003e\n\u003csummary\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003cspan class=\"svg-wrapper icon-plus\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" fill=\"none\" viewbox=\"0 0 14 14\" height=\"14\" width=\"14\"\u003e\u003cpath stroke-linecap=\"round\" stroke-width=\"var(--icon-stroke-width)\" stroke=\"currentColor\" d=\"M2.75 7H11.25\" class=\"vertical\"\u003e\u003c\/path\u003e\u003cpath stroke-linecap=\"round\" stroke-width=\"var(--icon-stroke-width)\" stroke=\"currentColor\" d=\"M7 2.75L7 11.25\" class=\"horizontal\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/span\u003e\u003c\/summary\u003e\n\n\u003cdiv class=\"details-content rte\"\u003e\n\n\u003cp\u003e\u003cstrong\u003eDesigned For:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCrane Axle 40-spline rear wheel-end systems\u003c\/li\u003e\n\u003cli\u003eGM 14-Bolt custom rear axle builds\u003c\/li\u003e\n\u003cli\u003eDana 60, Dana 70, and Dana 80 custom axle builds\u003c\/li\u003e\n\u003cli\u003eCustom fabricated rear axle housings\u003c\/li\u003e\n\u003cli\u003e40-spline axle shaft applications\u003c\/li\u003e\n\u003cli\u003eRock bouncers and competition crawlers\u003c\/li\u003e\n\u003cli\u003eUltra4 and race vehicles\u003c\/li\u003e\n\u003cli\u003eHigh-horsepower trail and off-road builds\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eFitment Notes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAluminum hubs are designed specifically for the Crane Axle 40-Spline Rear Spindle System\u003c\/li\u003e\n\u003cli\u003eDoes not fit factory GM 14-Bolt spindles\u003c\/li\u003e\n\u003cli\u003eDoes not fit standard GM 14-Bolt 30-spline spindle systems\u003c\/li\u003e\n\u003cli\u003eStandard spindle body measures 3.00\" O.D.\u003c\/li\u003e\n\u003cli\u003eSpindle body can be machined to fit axle tube bores as small as 2.00\"\u003c\/li\u003e\n\u003cli\u003eWheel bearing package is specific to the Crane Axle 40-spline spindle and hub system\u003c\/li\u003e\n\u003cli\u003eHub bearing races are included and pre-installed\u003c\/li\u003e\n\u003cli\u003eSpindles use an extended weld surface for fabricated axle housing installation\u003c\/li\u003e\n\u003cli\u003eFinal axle shaft, differential, brake, housing, and wheel configuration must be verified before assembly\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eAdditional Components Required:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e40-spline axle shafts\u003c\/li\u003e\n\u003cli\u003e40-spline compatible differential or spool\u003c\/li\u003e\n\u003cli\u003eBrake system\u003c\/li\u003e\n\u003cli\u003eWheel studs and applicable wheel hardware\u003c\/li\u003e\n\u003cli\u003eGear oil, bearing lubricant, and assembly supplies\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003chr\u003e\n\n\u003cdetails class=\"details\"\u003e\n\u003csummary\u003e\u003cstrong\u003eFAQ\u003c\/strong\u003e\u003cspan class=\"svg-wrapper icon-plus\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" fill=\"none\" viewbox=\"0 0 14 14\" height=\"14\" width=\"14\"\u003e\u003cpath stroke-linecap=\"round\" stroke-width=\"var(--icon-stroke-width)\" stroke=\"currentColor\" d=\"M2.75 7H11.25\" class=\"vertical\"\u003e\u003c\/path\u003e\u003cpath stroke-linecap=\"round\" stroke-width=\"var(--icon-stroke-width)\" stroke=\"currentColor\" d=\"M7 2.75L7 11.25\" class=\"horizontal\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/span\u003e\u003c\/summary\u003e\n\n\u003cdiv class=\"details-content rte\"\u003e\n\n\u003ch4\u003eWhat is included in this 40-spline wheel-end kit?\u003c\/h4\u003e\n\u003cp\u003eThis package combines the Crane Axle 40-spline rear spindles, matching 6061 billet aluminum wheel hubs, Timken inner and outer wheel bearings and races, wheel seals, bearing spacers, retaining snap rings, spindle nuts, retaining dowels, and 40-spline spindle spacers for both rear wheel ends.\u003c\/p\u003e\n\n\u003ch4\u003eWill these 40-spline aluminum hubs fit factory GM 14-Bolt spindles?\u003c\/h4\u003e\n\u003cp\u003eNo. These hubs are specifically engineered to work with the Crane Axle 40-Spline Rear Spindle System. They do not fit factory GM 14-Bolt spindles or standard 30-spline 14-Bolt spindle systems.\u003c\/p\u003e\n\n\u003ch4\u003eWhy does the 40-spline system use dedicated spindles?\u003c\/h4\u003e\n\u003cp\u003eThe Crane Axle spindle is designed around the increased axle shaft capacity and wheel-end loads associated with a 40-spline axle system. The larger spindle design increases wall thickness and provides the clearance required for the matching 40-spline axle components while using an extended weld surface for fabricated axle housings.\u003c\/p\u003e\n\n\u003ch4\u003eWhy use aluminum hubs with a heavy-duty 40-spline axle?\u003c\/h4\u003e\n\u003cp\u003eThe 6061 billet aluminum hubs reduce rotating and unsprung weight compared with heavy factory-style hubs. Removing weight at the wheel end helps reduce the mass the drivetrain has to accelerate and the brakes have to slow while allowing the suspension to react more effectively.\u003c\/p\u003e\n\n\u003ch4\u003eCan the spindles be used with different axle housings?\u003c\/h4\u003e\n\u003cp\u003eYes. The system is intended for custom fabricated rear axle applications, including GM 14-Bolt and custom Dana-based builds. The spindle has a standard 3.00\" outside diameter and can be machined down to accommodate axle tube bores as small as 2.00\". Final machining and installation must be matched to the housing being used.\u003c\/p\u003e\n\n\u003ch4\u003eAre the wheel bearings standard factory GM 14-Bolt bearings?\u003c\/h4\u003e\n\u003cp\u003eNo. The Crane Axle 40-spline spindle system uses its own matched Timken bearing package. The included inner and outer tapered roller bearings, races, spacers, seals, and retaining components are specifically selected for the Crane 40-spline spindle and hub configuration.\u003c\/p\u003e\n\n\u003ch4\u003eAre the bearing races already installed in the hubs?\u003c\/h4\u003e\n\u003cp\u003eYes. The matching bearing races are included and pre-installed in the Crane Axle aluminum wheel hubs.\u003c\/p\u003e\n\n\u003ch4\u003eDoes this kit include 40-spline axle shafts?\u003c\/h4\u003e\n\u003cp\u003eNo. Axle shafts are sold separately. Shaft length and configuration must be selected for the housing width, differential or spool, and complete axle assembly being built.\u003c\/p\u003e\n\n\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003chr\u003e","brand":"Crane Axle","offers":[{"title":"Default Title","offer_id":54044173697389,"sku":"CA01032-KIT","price":1599.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0927\/1145\/3037\/files\/CA01032-KIT.jpg?v=1790193775","url":"https:\/\/craneaxle.com\/products\/crane-axle-40-spline-rear-spindle-and-hub-assembly-pair","provider":"Crane Axle","version":"1.0","type":"link"}