{"product_id":"yukon-grizzly-locker-gm-14bolt-40-spline","title":"Yukon GM 14-Bolt  Grizzly Locker - 10.5\", 40-Spline, 4.10 \u0026 Down","description":"\u003cp class=\"p1\"\u003eBuilt for serious GM-14 bolt axle builds, this Yukon 40-spline Grizzly Locker sends 100% of available torque to both axle shafts under load. It’s a major upgrade for 10.5\" 14-bolt axles that have been converted to 40-spline shafts and are pushing larger tires, heavier loads, or extreme terrain- whether you're running a one-ton truck or a rock crawler.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eThe patented gear design uses larger engagement teeth and improved tooth geometry to significantly increase strength and reduce failure points. Built with 8620 steel internals, this unit is made to survive hard trail use, competition environments, and heavy-duty applications. It automatically unlocks during turns for improved drivability while maintaining full traction when needed.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cstrong\u003eIncludes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"ul1\"\u003e\n\u003cli class=\"li1\"\u003e(1) Locking differential for \u003cmeta charset=\"utf-8\"\u003eGM 10.5\" 14-bolt (40-spline)\u003c\/li\u003e\n\u003cli class=\"li1\"\u003eFully assembled internal gear set\u003cbr\u003e\n\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-end=\"1323\" data-start=\"1285\" data-section-id=\"1rnrhb7\"\u003eFits GM 10.5\" 14-bolt differential\u003c\/li\u003e\n\u003cli data-end=\"1356\" data-start=\"1324\" data-section-id=\"1t8r7r3\"\u003e40-spline axle compatibility\u003c\/li\u003e\n\u003cli data-end=\"1408\" data-start=\"1357\" data-section-id=\"1a4h37x\"\u003eCarrier: 4.10 and numerically lower gear ratios\u003c\/li\u003e\n\u003cli data-end=\"1454\" data-start=\"1409\" data-section-id=\"1ukngz8\"\u003eAutomatic mechanical locking differential\u003c\/li\u003e\n\u003cli data-end=\"1490\" data-start=\"1455\" data-section-id=\"5zx975\"\u003e100% torque transfer under load\u003c\/li\u003e\n\u003cli data-end=\"1525\" data-start=\"1491\" data-section-id=\"h4xyyc\"\u003e8620 steel internal components\u003c\/li\u003e\n\u003cli data-end=\"1588\" data-start=\"1526\" data-section-id=\"1oi18hw\"\u003ePatented gear design for increased strength and durability\u003c\/li\u003e\n\u003cli data-end=\"1648\" data-start=\"1589\" data-section-id=\"pkd3uc\"\u003eLarger internal teeth to resist shock load and breakage\u003c\/li\u003e\n\u003cli data-end=\"1688\" data-start=\"1649\" data-section-id=\"1dfn4si\"\u003eDoes not use factory thrust washers\u003c\/li\u003e\n\u003cli data-end=\"1721\" data-start=\"1689\" data-section-id=\"1djdu0t\"\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\u003eAvalanche 2500\u003c\/td\u003e\n\u003ctd\u003e2002–2006\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eC20 Pickup \u0026amp; Suburban\u003c\/td\u003e\n\u003ctd\u003e1973–1986\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eC2500\u003c\/td\u003e\n\u003ctd\u003e1988–2000\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eC2500 Suburban\u003c\/td\u003e\n\u003ctd\u003e1992–1999\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eC30 Pickup\u003c\/td\u003e\n\u003ctd\u003e1973–1986\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eC3500\u003c\/td\u003e\n\u003ctd\u003e1988–2000\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eC3500HD\u003c\/td\u003e\n\u003ctd\u003e1991–2002\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eExpress 2500\u003c\/td\u003e\n\u003ctd\u003e1996–2015\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eExpress 3500\u003c\/td\u003e\n\u003ctd\u003e1996–2015\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eExpress 4500\u003c\/td\u003e\n\u003ctd\u003e2009–2015\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eG20\u003c\/td\u003e\n\u003ctd\u003e1975–1995\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eG30\u003c\/td\u003e\n\u003ctd\u003e1979–1996\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eK20 Pickup \u0026amp; Suburban\u003c\/td\u003e\n\u003ctd\u003e1973–1986\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eK2500\u003c\/td\u003e\n\u003ctd\u003e1988–2000\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eK2500 Suburban\u003c\/td\u003e\n\u003ctd\u003e1992–1999\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eK30 Pickup\u003c\/td\u003e\n\u003ctd\u003e1972–1986\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eK3500\u003c\/td\u003e\n\u003ctd\u003e1988–2000\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eP30\u003c\/td\u003e\n\u003ctd\u003e1997–1999\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eR20\/R2500 Suburban\u003c\/td\u003e\n\u003ctd\u003e1987–1991\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eR30\u003c\/td\u003e\n\u003ctd\u003e1987–1988\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eSilverado 2500\u003c\/td\u003e\n\u003ctd\u003e1999–2004\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 2500 HD 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\u003e2007–2013\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eSuburban 2500\u003c\/td\u003e\n\u003ctd\u003e2000–2013\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eV20\/V2500 Suburban\u003c\/td\u003e\n\u003ctd\u003e1987–1991\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eV30\u003c\/td\u003e\n\u003ctd\u003e1987–1988\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGMC\u003c\/td\u003e\n\u003ctd\u003eC25\/C2500 Pickup \u0026amp; Suburban\u003c\/td\u003e\n\u003ctd\u003e1973–1978\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGMC\u003c\/td\u003e\n\u003ctd\u003eC2500\u003c\/td\u003e\n\u003ctd\u003e1979–2000\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGMC\u003c\/td\u003e\n\u003ctd\u003eC2500 Suburban\u003c\/td\u003e\n\u003ctd\u003e1979–1999\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGMC\u003c\/td\u003e\n\u003ctd\u003eC35\/C3500 Pickup\u003c\/td\u003e\n\u003ctd\u003e1973–1978\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGMC\u003c\/td\u003e\n\u003ctd\u003eC3500\u003c\/td\u003e\n\u003ctd\u003e1979–2000\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGMC\u003c\/td\u003e\n\u003ctd\u003eC3500HD\u003c\/td\u003e\n\u003ctd\u003e2001–2002\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGMC\u003c\/td\u003e\n\u003ctd\u003eG1500\u003c\/td\u003e\n\u003ctd\u003e1981–1987\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGMC\u003c\/td\u003e\n\u003ctd\u003eG3500\u003c\/td\u003e\n\u003ctd\u003e1979–1996\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGMC\u003c\/td\u003e\n\u003ctd\u003eK25\/K2500 Pickup \u0026amp; Suburban\u003c\/td\u003e\n\u003ctd\u003e1967–1986\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGMC\u003c\/td\u003e\n\u003ctd\u003eK2500\u003c\/td\u003e\n\u003ctd\u003e1979–2000\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGMC\u003c\/td\u003e\n\u003ctd\u003eK2500 Suburban\u003c\/td\u003e\n\u003ctd\u003e1979–1999\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGMC\u003c\/td\u003e\n\u003ctd\u003eK35\u003c\/td\u003e\n\u003ctd\u003e1977–1978\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGMC\u003c\/td\u003e\n\u003ctd\u003eK3500\u003c\/td\u003e\n\u003ctd\u003e1979–2000\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGMC\u003c\/td\u003e\n\u003ctd\u003eP3500\u003c\/td\u003e\n\u003ctd\u003e1997–1999\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGMC\u003c\/td\u003e\n\u003ctd\u003eR2500\/R2500 Suburban\u003c\/td\u003e\n\u003ctd\u003e1987–1991\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGMC\u003c\/td\u003e\n\u003ctd\u003eR3500\u003c\/td\u003e\n\u003ctd\u003e1987\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGMC\u003c\/td\u003e\n\u003ctd\u003eSavana 2500\u003c\/td\u003e\n\u003ctd\u003e1996–2015\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGMC\u003c\/td\u003e\n\u003ctd\u003eSavana 3500\u003c\/td\u003e\n\u003ctd\u003e1996–2015\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGMC\u003c\/td\u003e\n\u003ctd\u003eSavana 4500\u003c\/td\u003e\n\u003ctd\u003e2009–2015\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\u003e1999–2004\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\u003eV2500\/V2500 Suburban\u003c\/td\u003e\n\u003ctd\u003e1987–1991\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGMC\u003c\/td\u003e\n\u003ctd\u003eV3500\u003c\/td\u003e\n\u003ctd\u003e1987\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGMC\u003c\/td\u003e\n\u003ctd\u003eYukon XL\u003c\/td\u003e\n\u003ctd\u003e2015\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGMC\u003c\/td\u003e\n\u003ctd\u003eYukon XL 2500\u003c\/td\u003e\n\u003ctd\u003e2000–2013\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cul\u003e\n\u003cli data-end=\"1862\" data-start=\"1806\" data-section-id=\"1w48zr9\"\u003eRequires 40-spline axle shafts (aftermarket upgrade)\u003c\/li\u003e\n\u003cli data-end=\"1926\" data-start=\"1863\" data-section-id=\"guywin\"\u003eDesigned for 4.10 and numerically lower gear ratio carriers\u003c\/li\u003e\n\u003cli data-end=\"1984\" data-start=\"1927\" data-section-id=\"7q1vjf\"\u003eVerify carrier break and spline count before purchase\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-end=\"2330\" data-start=\"2028\"\u003eUpgrading a 14-bolt axle to 40-spline shafts significantly increases axle strength, but also requires a differential that can handle the added load. This locker is specifically built to match that level of strength, making it ideal for extreme builds running large tires and high torque.\u003c\/p\u003e\n\u003cp data-end=\"2575\" data-start=\"2332\"\u003eMechanical lockers like the Grizzly provide consistent traction by locking both wheels under load, which is critical in off-road environments. Proper setup and inspection are key to long-term durability, especially in high-stress applications.\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":56433606328486,"sku":"YUKYGLGM14T-3-40","price":767.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0693\/8394\/6406\/files\/YGLGM14T-3-40-GM-14Bolt-10.5-Grizzly-Locker-40-Spline-1.jpg?v=1777650755","url":"https:\/\/wideopendesign.com\/products\/yukon-grizzly-locker-gm-14bolt-40-spline","provider":"Wide Open Design","version":"1.0","type":"link"}