{"product_id":"yukon-grizzly-locker-gm-chrysler-truck-38-spline","title":"Yukon GM \u0026 Chrysler 11.5\" Grizzly Locker - 38-Spline","description":"\u003cp data-start=\"97\" data-end=\"672\"\u003eBuilt for heavy-duty GM and Chrysler 11.5\" axle builds, this 38-spline Grizzly Locker is designed for trucks and rigs that demand maximum traction and durability. Whether you're running a Duramax or Cummins tow rig, a high-horsepower street truck, or a full-size off-road build, this locker delivers true mechanical lockup—sending 100% of available torque to both wheels under load. \u003c\/p\u003e\n\u003cp data-start=\"674\" data-end=\"1087\"\u003eEngineered to handle extreme torque and shock loads, this locker features a patented internal design with larger engagement teeth and 8620 steel internals for increased strength and longevity. It automatically unlocks during turns for improved drivability while maintaining full traction when needed. Assembled in the USA.\u003c\/p\u003e\n\u003cp data-start=\"1089\" data-end=\"1100\"\u003e\u003cstrong\u003eIncludes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"1101\" data-end=\"1250\"\u003e\n\u003cli data-section-id=\"1k7v4ce\" data-start=\"1101\" data-end=\"1152\"\u003e(1) Mechanical locking differential (38-spline)\u003c\/li\u003e\n\u003cli data-section-id=\"h8cc4w\" data-start=\"1153\" data-end=\"1190\"\u003eFully assembled internal gear set\u003c\/li\u003e\n\u003cli data-section-id=\"1ke9xks\" data-start=\"1191\" data-end=\"1250\"\u003eInstallation-ready unit for GM and Chrysler 11.5\" axles\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\u003e\n\u003cli data-section-id=\"1a4m0vr\" data-start=\"1269\" data-end=\"1310\"\u003eFits GM and Chrysler 11.5\" rear axles\u003c\/li\u003e\n\u003cli data-section-id=\"w7nxn4\" data-start=\"1311\" data-end=\"1343\"\u003e38-spline axle compatibility\u003c\/li\u003e\n\u003cli data-section-id=\"1ukngz8\" data-start=\"1344\" data-end=\"1389\"\u003eAutomatic mechanical locking differential\u003c\/li\u003e\n\u003cli data-section-id=\"5zx975\" data-start=\"1390\" data-end=\"1425\"\u003e100% torque transfer under load\u003c\/li\u003e\n\u003cli data-section-id=\"h4xyyc\" data-start=\"1426\" data-end=\"1460\"\u003e8620 steel internal components\u003c\/li\u003e\n\u003cli data-section-id=\"bqezm6\" data-start=\"1461\" data-end=\"1508\"\u003ePatented gear design for increased strength\u003c\/li\u003e\n\u003cli data-section-id=\"4dfvvb\" data-start=\"1509\" data-end=\"1533\"\u003eAssembled in the USA\u003c\/li\u003e\n\u003cli data-section-id=\"1djdu0t\" data-start=\"1534\" data-end=\"1566\"\u003eDifferential Cover Bolts: 14\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\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\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eSilverado 2500\u003c\/td\u003e\n\u003ctd\u003e2001–2004\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eSilverado 2500 HD\u003c\/td\u003e\n\u003ctd\u003e2001–2015\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eSilverado 3500\u003c\/td\u003e\n\u003ctd\u003e2001–2006\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eSilverado 3500 Classic\u003c\/td\u003e\n\u003ctd\u003e2007\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eSilverado 3500 HD\u003c\/td\u003e\n\u003ctd\u003e2007–2015\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDodge\u003c\/td\u003e\n\u003ctd\u003eRam 2500\u003c\/td\u003e\n\u003ctd\u003e2003–2010\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDodge\u003c\/td\u003e\n\u003ctd\u003eRam 2500 Van\u003c\/td\u003e\n\u003ctd\u003e2003\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDodge\u003c\/td\u003e\n\u003ctd\u003eRam 3500\u003c\/td\u003e\n\u003ctd\u003e2003–2010\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGMC\u003c\/td\u003e\n\u003ctd\u003eSierra 2500\u003c\/td\u003e\n\u003ctd\u003e2001–2004\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGMC\u003c\/td\u003e\n\u003ctd\u003eSierra 2500 HD\u003c\/td\u003e\n\u003ctd\u003e2001–2015\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGMC\u003c\/td\u003e\n\u003ctd\u003eSierra 2500 HD Classic\u003c\/td\u003e\n\u003ctd\u003e2007\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGMC\u003c\/td\u003e\n\u003ctd\u003eSierra 3500\u003c\/td\u003e\n\u003ctd\u003e2001–2006\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGMC\u003c\/td\u003e\n\u003ctd\u003eSierra 3500 Classic\u003c\/td\u003e\n\u003ctd\u003e2007\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGMC\u003c\/td\u003e\n\u003ctd\u003eSierra 3500 HD\u003c\/td\u003e\n\u003ctd\u003e2007–2015\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRam\u003c\/td\u003e\n\u003ctd\u003e3500\u003c\/td\u003e\n\u003ctd\u003e2014–2015\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eRequires tool part number YT H32 for spindle modification\u003cbr\u003e\u003cmeta charset=\"utf-8\"\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: bold;\"\u003e\u003cstrong\u003eFactory spindles must be bored to accept 38 spline axles\u003c\/strong\u003e\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 data-start=\"1894\" data-end=\"2196\"\u003eThe 11.5\" axle platform is built for high-load applications, but factory differentials can struggle when torque and traction demands increase. A mechanical locker like the Grizzly ensures both wheels receive equal power, improving traction in towing, off-road, and performance scenarios.\u003c\/p\u003e\n\u003cp data-start=\"2198\" data-end=\"2424\"\u003eUpgrading to 38-spline axles significantly increases axle strength, but requires proper spindle modification for fitment. Ensuring correct machining and installation is critical to maintaining reliability in heavy-duty builds.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003chr\u003e","brand":"Yukon Gear \u0026 Axle","offers":[{"title":"Default Title","offer_id":53285017125229,"sku":"YUKYGLGM11.5-38","price":1738.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0927\/1145\/3037\/files\/YUKYGLGM11.5-38-Spline-Grizzly-Locker-GM11.5-Duramax.jpg?v=1777900263","url":"https:\/\/craneaxle.com\/products\/yukon-grizzly-locker-gm-chrysler-truck-38-spline","provider":"Crane Axle","version":"1.0","type":"link"}