{"product_id":"yukon-gear-99-04-mustang-axle-kit-31-spline-5-lug-axles-w-duragrip-positraction","title":"Yukon Gear 1999-2004 Mustang Axle Kit, 31 Spline, 5 Lug, w\/ Duragrip Positraction","description":"\u003ch4\u003eYukon Gear 1999-2004 Mustang Axle Kit, 31 Spline, 5 Lug, w\/ Duragrip Positraction\u003c\/h4\u003e\n\u003cp\u003eYukon Gear part YA FMUST-4-31 is a complete axle kit engineered for 1999-2004 Ford Mustang models with the 8.8in rear differential, including GT, Mach 1, and SVT Cobra. This kit upgrades to 31-spline, 5-lug axles paired with a Duragrip positraction unit, built from high-quality alloy for stronger-than-stock performance.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e31-spline upgrade axles (left and right)\u003c\/li\u003e\n\u003cli\u003e5-lug bolt pattern\u003c\/li\u003e\n\u003cli\u003eIncludes Duragrip positraction unit\u003c\/li\u003e\n\u003cli\u003eHigh-quality alloy construction with advanced heat-treating\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eFitment\u003c\/h4\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eYear\u003c\/th\u003e\n\u003cth\u003eMake\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eTrim\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1999-2004\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eMustang\u003c\/td\u003e\n\u003ctd\u003eBase \/ GT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2001\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eMustang\u003c\/td\u003e\n\u003ctd\u003eGT Bullitt\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2003-2004\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eMustang\u003c\/td\u003e\n\u003ctd\u003eMach 1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1999, 2001, 2003-2004\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eMustang\u003c\/td\u003e\n\u003ctd\u003eSVT Cobra\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2000\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eMustang\u003c\/td\u003e\n\u003ctd\u003eSVT Cobra R\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch4\u003eSpecifications\u003c\/h4\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer part number\u003c\/td\u003e\n\u003ctd\u003eYA FMUST-4-31\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eFord Mustang 8.8in rear differential\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpline count\u003c\/td\u003e\n\u003ctd\u003e31\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBolt pattern\u003c\/td\u003e\n\u003ctd\u003e5 lug\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePositraction unit\u003c\/td\u003e\n\u003ctd\u003eDuragrip included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch4\u003eWhat's Included\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eLeft and right 31-spline axle shafts\u003c\/li\u003e\n\u003cli\u003eDuragrip positraction unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eAbout Yukon Gear\u003c\/h4\u003e\n\u003cp\u003eYukon Gear \u0026amp; Axle manufactures differential, axle, and drivetrain components engineered for durable, precise-fit replacement and upgrade applications.\u003c\/p\u003e\n\u003ch4\u003eFAQ\u003c\/h4\u003e\n\u003cstrong\u003eWhat is included in this kit?\u003c\/strong\u003e\n\u003cp\u003eThis kit includes left and right 31-spline, 5-lug axle shafts and a Duragrip positraction unit.\u003c\/p\u003e\n\u003cstrong\u003eWhat vehicles does this kit fit?\u003c\/strong\u003e\n\u003cp\u003eThis kit fits 1999-2004 Ford Mustang models with the 8.8in rear differential, including GT, Mach 1, and SVT Cobra.\u003c\/p\u003e\n\u003cstrong\u003eWhat is a Duragrip positraction unit?\u003c\/strong\u003e\n\u003cp\u003eDuragrip is a limited-slip differential unit that improves traction by distributing power between both rear wheels.\u003c\/p\u003e\n\u003cstrong\u003eIs this an upgrade from the stock spline count?\u003c\/strong\u003e\n\u003cp\u003eYes, this kit upgrades many stock Mustang axles to a stronger 31-spline configuration.\u003c\/p\u003e\n\u003cstrong\u003eIs professional installation recommended?\u003c\/strong\u003e\n\u003cp\u003eYes. Installing this kit requires differential disassembly and precise setup, and should be performed by a qualified technician.\u003c\/p\u003e\n\u003cstrong\u003eCan I use this kit for street and track driving?\u003c\/strong\u003e\n\u003cp\u003eYes, this kit is designed for stronger-than-stock performance on the street and at the track.\u003c\/p\u003e\n\u003cstrong\u003eDoes this kit include gears?\u003c\/strong\u003e\n\u003cp\u003eNo, this kit includes axles and the positraction unit; ring and pinion gears should be ordered separately if needed.\u003c\/p\u003e\n\u003cstrong\u003eDo I need to confirm fitment before ordering?\u003c\/strong\u003e\n\u003cp\u003eYes. Confirm your exact Mustang model and year before ordering.\u003c\/p\u003e\n\u003ch4\u003eInstallation Instructions\u003c\/h4\u003e\n\u003col\u003e\n\u003cli\u003eRemove the differential cover and carrier assembly.\u003c\/li\u003e\n\u003cli\u003eRemove the old axles and open differential carrier.\u003c\/li\u003e\n\u003cli\u003eInstall the Duragrip positraction unit and new 31-spline axle shafts.\u003c\/li\u003e\n\u003cli\u003eReassemble the carrier and torque all fasteners to specification.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cstrong\u003eWARNING:\u003c\/strong\u003e This product can expose you to chemicals which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.\u003c\/p\u003e","brand":"Yukon Gear \u0026 Axle","offers":[{"title":"Default Title","offer_id":46417043652687,"sku":"YUKYA FMUST-4-31","price":1099.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/yukon-gear-1999-2004-mustang-axle-kit-31-spline-5-lug-w-duragrip-positraction-yukon-gear-axle.jpg?v=1786990350","url":"https:\/\/www.blackopsautoworks.com\/products\/yukon-gear-99-04-mustang-axle-kit-31-spline-5-lug-axles-w-duragrip-positraction","provider":"Black Ops Auto Works","version":"1.0","type":"link"}