{"product_id":"aam-40005988-ring-pinion-set-4-56-ratio-11-5-14-bolt-rear-axle","title":"AAM 40005988 Ring \u0026 Pinion Set 4.56 Ratio 11.5\" 14-Bolt Rear Axle","description":"\u003cp\u003eRestore accurate gear mesh and rear axle performance with this American Axle \u0026amp; Manufacturing 40005988 ring and pinion set, engineered specifically for the 11.5-inch 14-bolt rear axle found in GM trucks (2001-2018) and Dodge\/Ram trucks (2003-2018). This set delivers a 4.56 gear ratio with a 41-tooth ring gear and 9-tooth pinion, matched to a 30-spline pinion and 12-bolt ring gear pattern for correct fitment. As a Premium-grade component built by AAM, a name behind original equipment axle production, this ring and pinion set is sized to replace worn factory gearing without guesswork. Whether you're rebuilding a work truck differential or addressing gear wear on a heavy-duty pickup, this set gives you the exact ratio and tooth specifications needed to get the rear axle back to proper operating condition. Ships as a complete set, one per application.\u003c\/p\u003e\n\u003ch3\u003eNotes\u003c\/h3\u003e\u003cp\u003eRing and Pinion, GM 11.5 in. Axle 01-18, Dodge\/Ram 11.5 in. Axle 03-18\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e4.56 gear ratio matches OE specification for consistent rear axle rotation and drivetrain harmony.\u003c\/li\u003e\n  \u003cli\u003e41-tooth ring gear and 9-tooth pinion set ensures correct mesh for the 11.5\" 14-bolt axle.\u003c\/li\u003e\n  \u003cli\u003e30-spline pinion and 12-bolt ring gear pattern support proper installation fitment.\u003c\/li\u003e\n  \u003cli\u003ePremium-grade construction from American Axle \u0026amp; Manufacturing, an established axle component producer.\u003c\/li\u003e\n  \u003cli\u003eSized specifically for GM and Dodge\/Ram 11.5\" rear axles across a broad model year range.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eApplication Summary\u003c\/h3\u003e2001-2003, 2005-2006 Chevrolet Silverado 3500 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated GAS\u003cbr\u003e2001-2004 Chevrolet Silverado 2500 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated GAS\u003cbr\u003e2001-2004 GMC Sierra 2500 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated GAS\u003cbr\u003e2001-2006 GMC Sierra 3500 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated GAS\u003cbr\u003e2001-2006, 2008-2010 GMC Sierra 2500 HD 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated GAS\u003cbr\u003e2001-2011 Chevrolet Silverado 2500 HD 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated GAS\u003cbr\u003e2003 Dodge Ram 2500 Van 5.2L 5211CC 318CID V8 OHV 16 Valve Naturally Aspirated GAS\u003cbr\u003e2003-2004, 2006-2008 Dodge Ram 3500 5.9L -CC 359CID L6 OHV 24 Valve Turbocharged DIESEL\u003cbr\u003e2003-2005, 2007 Dodge Ram 2500 5.9L -CC 359CID L6 OHV 24 Valve Turbocharged DIESEL\u003cbr\u003e2004 Chevrolet Silverado 3500 6.6L 6599CC 403CID V8 OHV 32 Valve Turbocharged DIESEL\u003cbr\u003e2005, 2009 Dodge Ram 3500 5.7L -CC 345CID V8 OHV 16 Valve Naturally Aspirated GAS\u003cbr\u003e2006, 2008-2009 Dodge Ram 2500 5.7L -CC 345CID V8 OHV 16 Valve Naturally Aspirated GAS\u003cbr\u003e2007 Chevrolet Silverado 3500 Classic 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated GAS\u003cbr\u003e2007 GMC Sierra 2500 HD Classic 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated GAS\u003cbr\u003e2007 GMC Sierra 3500 Classic 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated GAS\u003cbr\u003e2007, 2011, 2014, 2016 GMC Sierra 2500 HD 6.6L 6599CC 403CID V8 OHV 32 Valve Turbocharged DIESEL\u003cbr\u003e2007-2011 GMC Sierra 3500 HD 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated GAS\u003cbr\u003e2007-2011, 2019 Chevrolet Silverado 3500 HD 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated GAS\u003cbr\u003e2010 Dodge Ram 2500 6.7L -CC 408CID L6 OHV 24 Valve Turbocharged DIESEL\u003cbr\u003e2010 Dodge Ram 3500 6.7L -CC 408CID L6 OHV 24 Valve Turbocharged DIESEL\u003cbr\u003e2011 Ram 3500 6.7L -CC 408CID L6 OHV 24 Valve Turbocharged DIESEL\u003cbr\u003e2011-2015, 2017 Ram 2500 5.7L -CC 345CID V8 OHV 16 Valve Naturally Aspirated GAS\u003cbr\u003e2012-2013, 2015, 2017-2018 GMC Sierra 2500 HD 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated FLEX\u003cbr\u003e2012-2013, 2017-2018 Chevrolet Silverado 3500 HD 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated FLEX\u003cbr\u003e2012-2013, 2017-2018 GMC Sierra 3500 HD 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated FLEX\u003cbr\u003e2012-2015, 2017-2018 Ram 3500 5.7L -CC 345CID V8 OHV 16 Valve Naturally Aspirated GAS\u003cbr\u003e2012-2018 Chevrolet Silverado 2500 HD 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated FLEX\u003cbr\u003e2014-2016 Chevrolet Silverado 3500 HD 6.6L 6599CC 403CID V8 OHV 32 Valve Turbocharged DIESEL\u003cbr\u003e2014-2016 GMC Sierra 3500 HD 6.6L 6599CC 403CID V8 OHV 32 Valve Turbocharged DIESEL\u003cbr\u003e2016 Ram 3500 6.4L 6424CC 392CID V8 OHV 16 Valve Naturally Aspirated GAS\u003cbr\u003e2016, 2018 Ram 2500 6.4L 6424CC 392CID V8 OHV 16 Valve Naturally Aspirated GAS\u003cbr\u003e\n\u003cdiv class=\"-partnumber\"\u003ePart Numbers: 40005988\u003c\/div\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e American Axle \u0026amp; Manufacturing\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 40005988\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Differential Ring and Pinion\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGTIN:\u003c\/strong\u003e 00840382500558\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Dimensions:\u003c\/strong\u003e 11.0000 x 11.0000 x 11.5000 IN\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Weight:\u003c\/strong\u003e 58.3000 PG\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Quantity:\u003c\/strong\u003e 1 BX\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCover Bolt Quantity:\u003c\/strong\u003e 14\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGear Ratio:\u003c\/strong\u003e 4.56\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGrade Type:\u003c\/strong\u003e Premium\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePinion Gear Tooth Quantity:\u003c\/strong\u003e 9\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWarranty\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWarranty Type:\u003c\/strong\u003e Limited\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWarranty Duration:\u003c\/strong\u003e 1 Years\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWarranty Description:\u003c\/strong\u003e Limited, see demandaam.com\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"American Axle \u0026 Manufacturing","offers":[{"title":"Default Title","offer_id":47835721334933,"sku":"40005988","price":859.26,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0496\/4266\/8181\/files\/40005988_E.jpg?v=1787718792","url":"https:\/\/mizumoauto.com\/products\/aam-40005988-ring-pinion-set-4-56-ratio-11-5-14-bolt-rear-axle","provider":"Mizumo Auto","version":"1.0","type":"link"}