{"title":"Rear Axle 40 Spline Wheel Hubs and Components","description":"","products":[{"product_id":"crane-axle-14-bolt-40-spline-aluminum-wheel-hubs","title":"Crane Axle GM 14-Bolt Aluminum Wheel Hubs - 40 Spline (for Crane Spindle System)","description":"\u003cp\u003eWhen you are pushing massive horsepower and running 40-spline shafts, your hubs are the critical link between power and traction. Crane Axle Premium 40-Spline Aluminum Wheel Hubs are engineered for the extreme abuse of rock bouncing and competition crawling, offering significant weight savings without sacrificing the strength required for severe shock loads.\u003c\/p\u003e\n\u003cp\u003eMachined in the USA from high grade 6061 aluminum, these hubs reduce rotational mass, allowing your drivetrain to spin up faster and react quicker.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCRITICAL FITMENT WARNING:\u003c\/strong\u003e These hubs are exclusively engineered as part of a specific system. They are \u003cstrong\u003eONLY \u003c\/strong\u003ecompatible with the \u003cstrong\u003e\u003ca href=\"\/products\/crane-axle-40-spline-rear-spindle-kit-pair\" title=\"Crane Axle 40 Spline Rear Spindle Kit\"\u003eCrane Axle 40 Spline Rear Spindle Kit (CA01032)\u003c\/a\u003e\u003c\/strong\u003e. They will not fit factory spindles or other aftermarket variations. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIncludes (Set of 2):\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e(2) 6061 Aluminum 14-Bolt Wheel Hubs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\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\u003cdiv class=\"details-content rte\"\u003e\n\u003cul\u003e\n\u003cli\u003eApplication: GM 14-Bolt Full-Floating Rear Axle\u003c\/li\u003e\n\u003cli\u003eSpline Count: 40-Spline\u003c\/li\u003e\n\u003cli\u003eMaterial: 6061 Billet Aluminum\u003c\/li\u003e\n\u003cli\u003eMachining: Precision machined in the USA\u003c\/li\u003e\n\u003cli\u003eBearing Races: Included \/ Pre-Installed\u003c\/li\u003e\n\u003cli\u003eWeight Savings: Lighter than factory steel hubs\u003c\/li\u003e\n\u003cli\u003eFinish: Machined aluminum\u003c\/li\u003e\n\u003cli\u003eDesigned for: Rock bouncing, rock crawling, desert use, and high-horsepower off-road builds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003chr\u003e\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\u003cdiv class=\"details-content rte\"\u003e\n\u003cul\u003e\n\u003cli\u003eGM 14-Bolt Full-Float Axle\u003c\/li\u003e\n\u003cli\u003eONLY Compatible with \u003ca href=\"\/products\/crane-axle-40-spline-rear-spindle-kit-pair\" title=\"Crane Axle 40 Spline Rear Spindle Kit\"\u003eCrane Axle 40 Spline Rear Spindle Kit (CA01032)\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003eWorks with standard 14-bolt brake and wheel components (unless otherwise modified)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003chr\u003e\n\u003cdetails class=\"details\"\u003e\n\u003csummary\u003e\u003cstrong\u003eTech Insight\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\u003cdiv class=\"details-content rte\"\u003e\n\u003cp\u003eCrane’s 40 Spline 14-Bolt Aluminum Wheel Hubs eliminate unnecessary unsprung and rotational weight while maintaining the strength needed for extreme off-road abuse. Aluminum hubs significantly reduce the rotating mass at each corner — meaning quicker acceleration, easier braking, and less stress on drivetrain components.\u003c\/p\u003e\n\u003cp\u003eCombined with a 40-spline upgrade, this setup is one of the most reliable and competition-proven options for aggressive off-road builds.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003chr\u003e\n\u003cdetails class=\"details\"\u003e\n\u003csummary\u003e\u003cstrong\u003eBuild Your Complete System\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\u003cdiv class=\"details-content rte\"\u003e\n\u003cp\u003eTo ensure proper fitment and performance, these hubs must be paired with the specific components listed below. Click the links to view the required matching parts for your build:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe Required Spindles:\u003c\/strong\u003e \u003ca href=\"\/products\/crane-axle-40-spline-rear-spindle-kit-pair\"\u003eCrane Axle 40 Spline Rear Spindle Kit (Pair) - CA01032\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrive Components:\u003c\/strong\u003e \u003ca href=\"\/products\/crane-14-bolt-40-spline-drive-flange-kit\" title=\"Crane 14 Bolt 40 Spline Drive Flange Kit\"\u003eCrane 14 Bolt 40 Spline Drive Flange Kit CA01052\u003c\/a\u003e\u003ca href=\"\/products\/crane-14-bolt-40-spline-drive-flange-kit\"\u003e\u003c\/a\u003e \u003ca title=\"Crane Axle Dana 60 – 40 Spline Drive Flange Kit\" href=\"\/products\/crane-dana-60-40-spline-drive-flange-kit\"\u003e\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBearings \u0026amp; Seals:\u003c\/strong\u003e \u003ca href=\"\/products\/40-spline-spindle-wheel-bearing-set\" title=\"Crane Axle 40 Spline Spindle Wheel Bearing Set\"\u003e\u003cspan\u003eCrane Axle 40 Spline Spindle Wheel Bearing Set CA01030\u003c\/span\u003e\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBraking: \u003c\/strong\u003e\u003ca href=\"\/products\/gm-rear-3-4-ton-disc-brake-kit\"\u003eCrane Axle 14-Bolt Rotor \u0026amp; Caliper Bracket Kit - WA01033\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWhy Run the Crane System?\u003c\/strong\u003e By utilizing the complete Crane Axle hub and spindle ecosystem, you are eliminating the weak points found in adapted \"junkyard\" builds. This is a purpose-built racing solution designed to handle the torque of a modern big block or LS, giving you the confidence to go wide open.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003chr\u003e","brand":"Crane Axle","offers":[{"title":"Default Title","offer_id":56095456723110,"sku":"CA0105040","price":599.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0693\/8394\/6406\/files\/CA0105040-Crane-14-Bolt-40-Spline-Aluminum-Wheel-Hub-1.jpg?v=1777573605"},{"product_id":"crane-14-bolt-40-spline-drive-flange-kit","title":"Crane Axle GM 14-Bolt Drive Flange Kit with Studs - 40 Spline","description":"\u003cp\u003eWe designed the Crane \u003cmeta charset=\"utf-8\"\u003e40-Spline 14-Bolt Drive Flange Kit with the extreme abuse of off-road trail riding and racing in mind. Built to handle the harshest conditions, the drive plates are made from \u003cmeta charset=\"utf-8\"\u003e8620 heat treated Chromoly steel while the engraved caps are made from \u003cmeta charset=\"utf-8\"\u003e6061 aluminum \u003c\/p\u003e\n\u003cp\u003eMade in the USA from premium materials, each component is precision-machined to ensure maximum durability and fitment on GM 14-bolt full-float axles. The 40-spline upgrade significantly increases the torque handling capability of your rear axle compared to factory 30-spline setups.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e14-Bolt Drive Flange Kit Includes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e(2) 40-Spline Drive Plates \u003c\/li\u003e\n\u003cli\u003e(2) Crane Axle Engraved Caps\u003c\/li\u003e\n\u003cli\u003e(16) Drive Flange Studs\u003c\/li\u003e\n\u003cli\u003eAll necessary O-rings and hardware\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003cdetails class=\"details\"\u003e\n\u003csummary\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003cspan class=\"svg-wrapper icon-plus\"\u003e\u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 14 14\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath class=\"vertical\" d=\"M2.75 7H11.25\" stroke=\"currentColor\" stroke-width=\"var(--icon-stroke-width)\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\u003cpath class=\"horizontal\" d=\"M7 2.75L7 11.25\" stroke=\"currentColor\" stroke-width=\"var(--icon-stroke-width)\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"details-content rte\"\u003e\n\u003cul\u003e\n\u003cli\u003eMaterial (Drive Plate): 8620 Chromoly Steel, Heat Treated\u003c\/li\u003e\n\u003cli\u003eCap Material: 6061-T6 Aluminum\u003c\/li\u003e\n\u003cli\u003eSpline Count: 40-Spline\u003c\/li\u003e\n\u003cli\u003eAxle Type: GM 14-Bolt Full-Float\u003c\/li\u003e\n\u003cli\u003eCountry of Origin: Made in the USA\u003c\/li\u003e\n\u003cli\u003eIncludes Studs, Hardware \u0026amp; O-Rings: Yes\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003chr\u003e\n\u003cdetails class=\"details\"\u003e\n\u003csummary\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003cspan class=\"svg-wrapper icon-plus\"\u003e\u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 14 14\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath class=\"vertical\" d=\"M2.75 7H11.25\" stroke=\"currentColor\" stroke-width=\"var(--icon-stroke-width)\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\u003cpath class=\"horizontal\" d=\"M7 2.75L7 11.25\" stroke=\"currentColor\" stroke-width=\"var(--icon-stroke-width)\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"details-content rte\"\u003e\n\u003cul\u003e\n\u003cli\u003eFits GM 14-Bolt Full-Floating Rear Axles\u003c\/li\u003e\n\u003cli\u003eDesigned for 40-Spline Axle Shafts\u003c\/li\u003e\n\u003cli\u003eCompatible with most aftermarket 14-bolt 40-spline conversions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003chr\u003e\n\u003cdetails class=\"details\"\u003e\n\u003csummary\u003e\u003cstrong\u003eTech Insight\u003c\/strong\u003e\u003cspan class=\"svg-wrapper icon-plus\"\u003e\u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 14 14\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath class=\"vertical\" d=\"M2.75 7H11.25\" stroke=\"currentColor\" stroke-width=\"var(--icon-stroke-width)\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\u003cpath class=\"horizontal\" d=\"M7 2.75L7 11.25\" stroke=\"currentColor\" stroke-width=\"var(--icon-stroke-width)\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"details-content rte\"\u003e\n\u003cp\u003eUpgrading to a 40-spline drive flange setup is one of the most effective ways to bulletproof a 14-bolt axle for off-road racing or hardcore trail use. The increased spline count offers a larger shaft diameter, distributing torque more evenly and reducing the likelihood of twisting or shearing under load. Crane Axle’s precisely machined drive plates and billet caps ensure a tight fit, proper sealing, and long term serviceability even under punishing conditions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003chr\u003e","brand":"Crane Axle","offers":[{"title":"Default Title","offer_id":56095457837222,"sku":"CA01052","price":424.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0693\/8394\/6406\/files\/CA01052-Crane-14Bolt-40Spline-Drive-Flange-Kit-1_99db64a4-63af-49a7-8a48-d78e9d94cbb8.jpg?v=1777409279"},{"product_id":"40-spline-spindle-wheel-bearing-set","title":"Crane Axle 40-Spline Spindle Wheel Bearing Set (for Crane Spindle System)","description":"\u003cp class=\"p1\"\u003eThe Crane Axle 40 Spline Spindle Wheel Bearing Set is designed specifically for Crane Axle 40 spline rear spindles and 40 spline GM 14-Bolt spindle applications. This complete bearing package provides the components necessary to properly support high-strength 40 spline axle assemblies used in competition crawlers, rock bouncers, and heavy-duty off-road builds.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eBuilt around precision Timken bearings and races, this kit is engineered to handle the increased load capacity and shock forces associated with large tires, high horsepower, and aggressive off-road use. The included spacers, seals, and retaining hardware help maintain proper preload and lubrication while improving wheel end durability under extreme operating conditions.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cb\u003eIncludes:\u003c\/b\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cul class=\"ul1\"\u003e\n\u003cli class=\"li1\"\u003e(2) Timken Inner Bearings and Races\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e(2) Timken Outer Bearings and Races\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e(2) Wheel Seals\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e(2) Bearing Spacers\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e(2) Bearing Retaining Snap Rings\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNote: Fits \u003ca href=\"\/products\/crane-axle-40-spline-rear-spindle-kit-pair\" target=\"_blank\" rel=\"noopener\"\u003eCrane Axle 40 spline spindle system\u003c\/a\u003e only\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr\u003e\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\u003cdiv class=\"details-content rte\"\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned for \u003ca rel=\"noopener\" href=\"\/products\/crane-axle-40-spline-rear-spindle-kit-pair\" target=\"_blank\"\u003eCrane Axle 40-Spline 14-Bolt Spindles\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003eIncludes complete bearing, seal, and spacer set\u003c\/li\u003e\n\u003cli\u003eTimken bearings and races for precision fit and durability\u003c\/li\u003e\n\u003cli\u003eHeavy duty bearing spacers for proper preload setup\u003c\/li\u003e\n\u003cli\u003eWheel seals prevent contamination and retain lubrication\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003chr\u003e\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\u003cdiv class=\"details-content rte\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eMake\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eYear Range\u003c\/th\u003e\n\u003cth\u003eAxle Application\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eGM\u003c\/td\u003e\n\u003ctd\u003eCustom Off-Road Applications\u003c\/td\u003e\n\u003ctd\u003eUniversal\u003c\/td\u003e\n\u003ctd\u003eGM 14-Bolt Rear Spindle System\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eCustom Fabricated Axle Builds\u003c\/td\u003e\n\u003ctd\u003eUniversal\u003c\/td\u003e\n\u003ctd\u003eGM 14-Bolt Rear Spindle System\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGMC\u003c\/td\u003e\n\u003ctd\u003eCustom Fabricated Axle Builds\u003c\/td\u003e\n\u003ctd\u003eUniversal\u003c\/td\u003e\n\u003ctd\u003eGM 14-Bolt Rear Spindle System\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp class=\"p1\"\u003e\u003cb\u003eFitment Notes:\u003c\/b\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cul class=\"ul1\"\u003e\n\u003cli class=\"li1\" style=\"font-weight: bold;\"\u003e\u003cstrong\u003eFits Crane Axle 40 spline spindle systems only\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli class=\"li1\"\u003eCompatible with Crane Axle 40 spline GM 14-Bolt spindles\u003c\/li\u003e\n\u003cli class=\"li1\"\u003eDesigned for 40 spline axle shaft applications\u003c\/li\u003e\n\u003cli class=\"li1\"\u003eNot intended for factory OE spindle configurations\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003chr\u003e\n\u003cdetails class=\"details\"\u003e\n\u003csummary\u003e\u003cstrong\u003eTech Insight\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\n          \u003cpath stroke-linecap=\"round\" stroke-width=\"var(--icon-stroke-width)\" stroke=\"currentColor\" d=\"M2.75 7H11.25\" class=\"vertical\"\u003e\u003c\/path\u003e\n          \u003cpath stroke-linecap=\"round\" stroke-width=\"var(--icon-stroke-width)\" stroke=\"currentColor\" d=\"M7 2.75L7 11.25\" class=\"horizontal\"\u003e\u003c\/path\u003e\n        \u003c\/svg\u003e\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"details-content rte\"\u003e\n\u003cp class=\"p1\"\u003eMoving to a 40 spline wheel end setup significantly increases axle strength by allowing the use of larger diameter axle shafts capable of handling higher torque loads and extreme traction conditions. However, larger shafts also place additional stress on wheel bearings and spindle components, making bearing quality and preload control critical.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eThis system uses Timken bearings combined with precision spacers and retaining hardware to help maintain proper bearing preload and lubrication under heavy load. Proper wheel end support is especially important in rock bouncing and competition environments where repeated shock loading can quickly damage undersized or improperly supported bearing assemblies.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003chr\u003e","brand":"Crane Axle","offers":[{"title":"Default Title","offer_id":56095459377318,"sku":"CA01030","price":449.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0693\/8394\/6406\/files\/CA01030-40-Spline-Spindle-Wheel-Bearing-Set-1.jpg?v=1777413719"},{"product_id":"crane-axle-40-spline-rear-spindle-kit-pair","title":"Crane Axle GM 14-Bolt 40 Spline Rear Spindle Kit (Pair)","description":"\u003cp class=\"p1\"\u003eThe Crane Axle 40 Spline Rear Spindle Kit is designed for high-load rear axle applications where factory spindle systems are no longer sufficient. Engineered for rock racing, competition crawlers, heavy trail rigs, and custom fabricated axle housings, these spindles are machined from 4140 chromoly steel and built to support massive 40 spline axle shafts under extreme torque and suspension load conditions.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eEach spindle is machined in-house, heat treated for improved hardness, and finish-ground for precise wheel bearing fitment. Compared to traditional factory spindle systems, the increased spindle wall thickness and larger shaft capacity dramatically improve resistance to bending and twisting under load. The spindle design also supports a wide range of custom fabrication needs, allowing the spindle end to be machined down for compatibility with smaller axle tube bores while retaining the strength advantages of a 40 spline wheel end system.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cb\u003eIncludes:\u003c\/b\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cul class=\"ul1\"\u003e\n\u003cli class=\"li1\"\u003e(2) 4140 Chromoly 14-Bolt 40 Spline Spindles\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e(4) 40 Spline Spindle Nuts\u003c\/li\u003e\n\u003cli class=\"li1\"\u003e(2) Spindle Nut Retaining Dowels\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"p1\"\u003e\u003cb\u003eOptional:\u003c\/b\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cul class=\"ul1\"\u003e\n\u003cli class=\"li1\"\u003e\n\u003ca href=\"\/products\/crane-axle-40-spline-spindle-socket\" rel=\"noopener\" target=\"_blank\"\u003eCrane 40 Spline Spindle Socket \u003c\/a\u003esold separately\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\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\n          \u003cpath stroke-linecap=\"round\" stroke-width=\"var(--icon-stroke-width)\" stroke=\"currentColor\" d=\"M2.75 7H11.25\" class=\"vertical\"\u003e\u003c\/path\u003e\n          \u003cpath stroke-linecap=\"round\" stroke-width=\"var(--icon-stroke-width)\" stroke=\"currentColor\" d=\"M7 2.75L7 11.25\" class=\"horizontal\"\u003e\u003c\/path\u003e\n        \u003c\/svg\u003e\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"details-content rte\"\u003e\n\u003cul class=\"ul1\"\u003e\n\u003cli class=\"li1\"\u003eDesigned for 40 spline rear axle assemblies\u003c\/li\u003e\n\u003cli class=\"li1\"\u003eMachined from 4140 chromoly steel\u003c\/li\u003e\n\u003cli class=\"li1\"\u003eHeat treated for increased hardness and durability\u003c\/li\u003e\n\u003cli class=\"li1\"\u003ePrecision finish-ground bearing surfaces\u003c\/li\u003e\n\u003cli class=\"li1\"\u003eStandard 3.00\" outer diameter spindle body\u003c\/li\u003e\n\u003cli class=\"li1\"\u003eCan be machined to fit axle tube bores as small as 2.00\"\u003c\/li\u003e\n\u003cli class=\"li1\"\u003eHeavy-duty extended weld surface design\u003c\/li\u003e\n\u003cli class=\"li1\"\u003eIntended for custom fabricated axle housings\u003c\/li\u003e\n\u003cli class=\"li1\"\u003eMade in the USA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003chr\u003e\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\n          \u003cpath stroke-linecap=\"round\" stroke-width=\"var(--icon-stroke-width)\" stroke=\"currentColor\" d=\"M2.75 7H11.25\" class=\"vertical\"\u003e\u003c\/path\u003e\n          \u003cpath stroke-linecap=\"round\" stroke-width=\"var(--icon-stroke-width)\" stroke=\"currentColor\" d=\"M7 2.75L7 11.25\" class=\"horizontal\"\u003e\u003c\/path\u003e\n        \u003c\/svg\u003e\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"details-content rte\"\u003e\n\u003ctable style=\"width: 99.9802%; height: 156.818px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"height: 39.2045px;\"\u003e\n\u003cth style=\"width: 6.39082%; height: 39.2045px;\"\u003eMake\u003c\/th\u003e\n\u003cth style=\"width: 47.7791%; height: 39.2045px;\"\u003eModel\u003c\/th\u003e\n\u003cth style=\"width: 13.2757%; height: 39.2045px;\"\u003eYear Range\u003c\/th\u003e\n\u003cth style=\"width: 28.0287%; height: 39.2045px;\"\u003eAxle Application\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 39.2045px;\"\u003e\n\u003ctd style=\"text-align: center; width: 6.39082%; height: 39.2045px;\"\u003e--\u003c\/td\u003e\n\u003ctd style=\"width: 47.7791%; height: 39.2045px;\"\u003eCustom Fabrication Applications\u003c\/td\u003e\n\u003ctd style=\"text-align: center; width: 13.2757%; height: 39.2045px;\"\u003e--\u003c\/td\u003e\n\u003ctd style=\"width: 28.0287%; height: 39.2045px;\"\u003eRear Axle Spindle System\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.2045px;\"\u003e\n\u003ctd style=\"width: 6.39082%; height: 39.2045px;\"\u003eGM\u003c\/td\u003e\n\u003ctd style=\"width: 47.7791%; height: 39.2045px;\"\u003e14-Bolt Custom Builds\u003c\/td\u003e\n\u003ctd style=\"text-align: center; width: 13.2757%; height: 39.2045px;\"\u003e--\u003c\/td\u003e\n\u003ctd style=\"width: 28.0287%; height: 39.2045px;\"\u003eRear Axle Spindle System\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.2045px;\"\u003e\n\u003ctd style=\"width: 6.39082%; height: 39.2045px;\"\u003eDana\u003c\/td\u003e\n\u003ctd style=\"width: 47.7791%; height: 39.2045px;\"\u003eDana 60 \/ Dana 70 \/ Dana 80 Custom Builds\u003c\/td\u003e\n\u003ctd style=\"text-align: center; width: 13.2757%; height: 39.2045px;\"\u003e--\u003c\/td\u003e\n\u003ctd style=\"width: 28.0287%; height: 39.2045px;\"\u003eRear Axle Spindle System\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp class=\"p1\"\u003e\u003cb\u003eFitment Notes:\u003c\/b\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cul class=\"ul1\"\u003e\n\u003cli class=\"li1\"\u003eDesigned for custom fabricated rear axle applications\u003c\/li\u003e\n\u003cli class=\"li1\"\u003eRequires modification of wheel hubs internally\u003c\/li\u003e\n\u003cli class=\"li1\"\u003eCompatible with 40 spline axle shaft systems\u003c\/li\u003e\n\u003cli class=\"li1\"\u003eSpindle O.D. may be machined for smaller axle tube bore sizes\u003c\/li\u003e\n\u003cli class=\"li1\"\u003eIntended for fabricated and high-strength rear axle builds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003chr\u003e\n\u003cdetails class=\"details\"\u003e\n\u003csummary\u003e\u003cmeta charset=\"utf-8\"\u003e \u003cb id=\"docs-internal-guid-785e0e5c-7fff-2ba3-1543-a8eda468b24e\"\u003e\u003cspan\u003eTech Insight\u003c\/span\u003e\u003c\/b\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\n          \u003cpath stroke-linecap=\"round\" stroke-width=\"var(--icon-stroke-width)\" stroke=\"currentColor\" d=\"M2.75 7H11.25\" class=\"vertical\"\u003e\u003c\/path\u003e\n          \u003cpath stroke-linecap=\"round\" stroke-width=\"var(--icon-stroke-width)\" stroke=\"currentColor\" d=\"M7 2.75L7 11.25\" class=\"horizontal\"\u003e\u003c\/path\u003e\n        \u003c\/svg\u003e\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"details-content rte\"\u003e\n\u003cp class=\"p1\"\u003eLarge tires, high horsepower, and aggressive off-road traction place substantial stress on rear spindle systems, especially in competition environments where shock loads are repeated continuously. Factory spindle systems can become a failure point due to limited spindle wall thickness and smaller axle shaft capacity.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eBy increasing spindle wall thickness and supporting 40 spline axle shafts, this system significantly improves resistance to spindle flex and torsional load. The extended weld surface also improves spindle-to-housing strength in fabricated axle applications. Because the spindle body can be machined for smaller bore housings, builders gain additional flexibility when designing custom rear axle assemblies without giving up the benefits of a heavy-duty 40 spline wheel end.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003chr\u003e","brand":"Crane Axle","offers":[{"title":"Default Title","offer_id":56095459999910,"sku":"CA01032","price":549.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0693\/8394\/6406\/files\/CA01032-Crane-14-Bolt-40-Spline-Spindles-1_6db107ad-c4f2-448d-a28f-45698f1bddd9.jpg?v=1776869326"},{"product_id":"crane-axle-40-spline-spindle-socket","title":"Crane Axle 40-Spline Spindle Socket","description":"\u003cp\u003eCrane Axle’s 40-Spline Spindle Socket is precision engineered from 4140 chromoly steel and heat treated for maximum durability and longevity. Specifically designed to work with Crane Axle spindle nuts, this tool ensures a perfect fit and secure engagement every time.\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(201, 0, 0);\"\u003e\u003cstrong\u003eIMPORTANT! \u003c\/strong\u003e\u003cspan style=\"color: rgb(0, 0, 0);\"\u003eThis spindle socket \u003cstrong\u003eONLY \u003c\/strong\u003eworks with \u003cstrong\u003e\u003ca href=\"\/products\/crane-axle-40-spline-spindle-nut-each\" title=\"Crane Axle 40 Spline Spindle Nut\"\u003eCrane Axle 40 Spline Nuts\u003c\/a\u003e\u003c\/strong\u003e or the \u003cstrong\u003e\u003ca href=\"\/products\/crane-axle-40-spline-rear-spindle-kit-pair\" title=\"40 Spline Spindle Kit\"\u003eCrane Axle 40 Spline Spindle Kit\u003c\/a\u003e\u003c\/strong\u003e. \u003cspan\u003e\u003cstrong\u003eNOT FOR OTHER 40 SPLINE AXLE NUTS\u003c\/strong\u003e.\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eBuilt for custom builders and serious off-road enthusiasts, this socket is purpose-made for the demands of 40 spline axle assemblies, making installation and service of spindle nuts fast, safe, and reliable.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePrecision Machined from 4140 Chromoly Steel for superior strength\u003c\/li\u003e\n\u003cli\u003eHeat Treated for enhanced durability and wear resistance\u003c\/li\u003e\n\u003cli\u003eDesigned Specifically for Crane Axle Spindle Nuts\u003c\/li\u003e\n\u003cli\u003e3\/4\" Diameter Drive for compatibility with standard socket tools\u003c\/li\u003e\n\u003cli\u003eMade in the USA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003ePerfect For:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCrane Axle 40 spline hub and spindle assemblies\u003c\/li\u003e\n\u003cli\u003eRock bouncers, Rock crawler vehicles, and custom trail rigs using Crane 40 spline spindles\u003c\/li\u003e\n\u003cli\u003eProfessional shops and home fabricators maintaining Crane Axle components\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Crane Axle","offers":[{"title":"Default Title","offer_id":56214543990950,"sku":"CA01027","price":49.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0693\/8394\/6406\/files\/CA01027-Crane-Axle-40-Spline-Spindle-Socket-3.jpg?v=1777396987"},{"product_id":"crane-axle-40-spline-spindle-nut-each","title":"Crane Axle 40-Spline Spindle Nut (Single)","description":"\u003cp\u003eCrane Axle’s 40-Spline Spindle Nut is precision machined in-house and heat treated for long term durability. Designed specifically for 40-spline axle assemblies, these spindle nuts provide the strength and reliability needed for high performance off-road applications.\u003c\/p\u003e\n\u003cp\u003eOur 40-spline spindle nut secures and sets the bearing preload on a 40-spline axle shaft, locking the assembly in place under extreme load. Each nut is engineered to handle greater torque than standard axle systems while maintaining a consistent bearing preload.\u003c\/p\u003e\n\u003cp\u003eKey Features:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePrecision Machined \u0026amp; Heat Treated for long term durability and strength\u003c\/li\u003e\n\u003cli\u003eEngineered for 40-Spline Spindles with a thicker wall and stronger design\u003c\/li\u003e\n\u003cli\u003eInternal \u0026amp; External Groove Design aligns with spindle keyway for secure locking\u003c\/li\u003e\n\u003cli\u003eMade \u0026amp; \u003cmeta charset=\"utf-8\"\u003emachined in USA by Crane Axle\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eFunction:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe spindle nut threads onto the 40-spline spindle to set the correct bearing preload. Internal grooves align with a keyway on the spindle, and a dowel or roll pin passes through a keeper and the spindle to securely lock the assembly after the proper preload is achieved.\u003c\/p\u003e","brand":"Crane Axle","offers":[{"title":"Default Title","offer_id":56217078235302,"sku":"CA01028","price":36.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0693\/8394\/6406\/files\/CA01028-Crane-Axle-40-Spline-Spindle-Nut-1.jpg?v=1778093392"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0693\/8394\/6406\/collections\/CA01032-Crane-14-Bolt-40-Spline-Spindles-1_6db107ad-c4f2-448d-a28f-45698f1bddd9.jpg?v=1778167539","url":"https:\/\/wideopendesign.com\/collections\/rear-axle-40-spline-wheel-hubs-and-components.oembed","provider":"Wide Open Design","version":"1.0","type":"link"}