{"product_id":"yukon-gear-install-kit-package-for-jeep-jk-non-rubicon-in-a-4-88-ratio","title":"Yukon Gear \u0026 Install Kit Package For Jeep JK Non-Rubicon in a 4.88 Ratio","description":"\u003ch4\u003eYukon Gear Install Kit Package for Jeep JK Non-Rubicon, 4.88 Ratio (YGK013)\u003c\/h4\u003e\n\u003cp\u003eThe YGK013 install kit package from Yukon Gear delivers a complete re-gear solution for the Dana 30 front and Dana 44 rear axles found in non-Rubicon Jeep Wrangler JK models, stepping up to a 4.88 gear ratio. YGK013 is the ideal choice for JK non-Rubicon owners who have moved to 35-inch tires and want aggressive, responsive power delivery both on and off the pavement. The 4.88 ratio provides more low-end torque multiplication than a 4.56 swap and is one of the most popular choices for JK owners who also plan to add larger tires in the future. This single kit includes ring and pinion sets plus all the installation hardware needed for a complete professional installation on both axles.\u003c\/p\u003e\n\n\u003ch4\u003eFeatures and Benefits\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eComplete re-gear kit covering Dana 30 front and Dana 44 rear axles in one package\u003c\/li\u003e\n\u003cli\u003e4.88 gear ratio ideal for 35-37 inch tire applications on non-Rubicon JK Wranglers\u003c\/li\u003e\n\u003cli\u003eIncludes ring and pinion sets for both axles plus all install hardware (bearings, seals, shim packs, crush sleeves)\u003c\/li\u003e\n\u003cli\u003eYukon Gear components machined to precise tolerances for correct backlash, quiet operation, and long service life\u003c\/li\u003e\n\u003cli\u003eSimplifies the re-gear project by supplying front and rear components together\u003c\/li\u003e\n\u003cli\u003eImportant: If your JK originally has the 3.21 factory ratio, a new front carrier is required and sold separately\u003c\/li\u003e\n\u003cli\u003eFor non-Rubicon JK only (Dana 30 front axle) - not compatible with Rubicon Dana 44 front\u003c\/li\u003e\n\u003cli\u003eFits 2007-2018 Jeep Wrangler JK and Unlimited JK non-Rubicon\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eVehicle Fitment\u003c\/h4\u003e\n\u003ctable\u003e\n\u003cthead\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\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e2007\u003c\/td\u003e\n\u003ctd\u003eJeep\u003c\/td\u003e\n\u003ctd\u003eWrangler\u003c\/td\u003e\n\u003ctd\u003eSahara, Unlimited Sahara, Unlimited X, X\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2008\u003c\/td\u003e\n\u003ctd\u003eJeep\u003c\/td\u003e\n\u003ctd\u003eWrangler\u003c\/td\u003e\n\u003ctd\u003eSahara, Unlimited Sahara, Unlimited X, X\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2009\u003c\/td\u003e\n\u003ctd\u003eJeep\u003c\/td\u003e\n\u003ctd\u003eWrangler\u003c\/td\u003e\n\u003ctd\u003eSahara, Unlimited Sahara, Unlimited X, X\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2010\u003c\/td\u003e\n\u003ctd\u003eJeep\u003c\/td\u003e\n\u003ctd\u003eWrangler\u003c\/td\u003e\n\u003ctd\u003eSahara, Sport, Unlimited Sahara, Unlimited Sport, Unlimited X, X\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2011\u003c\/td\u003e\n\u003ctd\u003eJeep\u003c\/td\u003e\n\u003ctd\u003eWrangler\u003c\/td\u003e\n\u003ctd\u003e70th Anniversary, Sahara, Sport, Unlimited Sahara, Unlimited Sport\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2012\u003c\/td\u003e\n\u003ctd\u003eJeep\u003c\/td\u003e\n\u003ctd\u003eWrangler\u003c\/td\u003e\n\u003ctd\u003eSahara, Sport, Unlimited Sahara, Unlimited Sport\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2013\u003c\/td\u003e\n\u003ctd\u003eJeep\u003c\/td\u003e\n\u003ctd\u003eWrangler\u003c\/td\u003e\n\u003ctd\u003eSahara, Sport, Unlimited Sahara, Unlimited Sport\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2014\u003c\/td\u003e\n\u003ctd\u003eJeep\u003c\/td\u003e\n\u003ctd\u003eWrangler\u003c\/td\u003e\n\u003ctd\u003eSahara, Sport, Unlimited Sahara, Unlimited Sport\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2015\u003c\/td\u003e\n\u003ctd\u003eJeep\u003c\/td\u003e\n\u003ctd\u003eWrangler\u003c\/td\u003e\n\u003ctd\u003eSahara, Sport, Unlimited Sahara, Unlimited Sport\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2016\u003c\/td\u003e\n\u003ctd\u003eJeep\u003c\/td\u003e\n\u003ctd\u003eWrangler\u003c\/td\u003e\n\u003ctd\u003eSahara, Sport, Sport S, Unlimited Sahara, Unlimited Sport, Unlimited Sport S\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2017\u003c\/td\u003e\n\u003ctd\u003eJeep\u003c\/td\u003e\n\u003ctd\u003eWrangler\u003c\/td\u003e\n\u003ctd\u003eSahara, Sport, Unlimited Sahara, Unlimited Sport\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2018\u003c\/td\u003e\n\u003ctd\u003eJeep\u003c\/td\u003e\n\u003ctd\u003eWrangler JK\u003c\/td\u003e\n\u003ctd\u003eSahara, Sport, Sport S, Unlimited Sahara, Unlimited Sport, Unlimited Sport S\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch4\u003eSpecifications\u003c\/h4\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003eYGK013\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUPC\u003c\/td\u003e\n\u003ctd\u003e883584310136\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFront Differential\u003c\/td\u003e\n\u003ctd\u003eDana 30\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear Differential\u003c\/td\u003e\n\u003ctd\u003eDana 44\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGear Ratio\u003c\/td\u003e\n\u003ctd\u003e4.88\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eNon-Rubicon JK only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel Years\u003c\/td\u003e\n\u003ctd\u003e2007-2018\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNote\u003c\/td\u003e\n\u003ctd\u003e3.21 factory ratio requires new front carrier (sold separately)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003eYukon Gear limited warranty\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch4\u003eWhat's Included\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eRing and pinion set for Dana 30 front axle (4.88 ratio)\u003c\/li\u003e\n\u003cli\u003eRing and pinion set for Dana 44 rear axle (4.88 ratio)\u003c\/li\u003e\n\u003cli\u003eFront install kit (pinion bearing set, pinion seal, shim pack, crush sleeve)\u003c\/li\u003e\n\u003cli\u003eRear install kit (pinion bearing set, pinion seal, shim pack, crush sleeve)\u003c\/li\u003e\n\u003cli\u003eDifferential gaskets for front and rear\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eFrequently Asked Questions\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is YGK013?\u003c\/strong\u003e\u003cbr\u003e\nYGK013 is a complete gear and install kit package for regearing the Dana 30 front and Dana 44 rear axles of a non-Rubicon Jeep Wrangler JK to a 4.88 ratio. It includes ring and pinion gear sets for both axles plus all necessary installation hardware.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow does 4.88 compare to 4.56 for a JK build?\u003c\/strong\u003e\u003cbr\u003e\nA 4.88 ratio provides greater torque multiplication than a 4.56, which means stronger low-speed pulling power and better crawling ability. The trade-off is slightly higher engine RPM at highway speed. For JK owners planning to run 35-37 inch tires and use the vehicle frequently off-road, 4.88 is typically the preferred choice over 4.56.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWill YGK013 work in a Rubicon JK?\u003c\/strong\u003e\u003cbr\u003e\nNo. YGK013 is designed for non-Rubicon JK Wranglers with a Dana 30 front axle. Rubicon models use a Dana 44 front axle. For Rubicon-specific kits, see YGK015 (4.88) or YGK016 (5.13).\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat if my JK originally had the 3.21 gear ratio?\u003c\/strong\u003e\u003cbr\u003e\nIf your JK was built with the 3.21 ratio, the factory front open carrier is not compatible with the 4.88 ring gear. A new front carrier must be sourced separately before YGK013 can be installed correctly.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDoes installing YGK013 affect my vehicle warranty?\u003c\/strong\u003e\u003cbr\u003e\nUnder the Magnuson-Moss Warranty Act, an automaker or dealer cannot void a vehicle warranty simply because an aftermarket part was installed, unless they can prove the aftermarket part directly caused a failure. Consult your dealer for guidance on your specific warranty situation.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDo I need to re-gear both axles at the same time?\u003c\/strong\u003e\u003cbr\u003e\nYes, always re-gear both axles simultaneously. Running mismatched ratios between the front and rear axles causes severe drivetrain binding in 4WD and will damage the transfer case. YGK013 is intentionally sold as a front-and-rear kit to prevent this issue.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIs professional installation recommended?\u003c\/strong\u003e\u003cbr\u003e\nRing and pinion setup requires precise shimming for pinion depth and carrier bearing preload, plus backlash measurement with a dial indicator. While a skilled DIYer with appropriate tools can complete the job, professional installation by a drivetrain shop is strongly recommended to ensure proper gear mesh pattern and long-term durability.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat warranty comes with YGK013?\u003c\/strong\u003e\u003cbr\u003e\nYGK013 is covered by Yukon Gear's limited warranty against defects in materials and workmanship. Contact Yukon Gear directly for warranty terms and claim procedures.\u003c\/p\u003e\n\n\u003ch4\u003eInstallation Instructions\u003c\/h4\u003e\n\u003col\u003e\n\u003cli\u003eDrain both front and rear differential fluid. Remove differential covers and clean all mating surfaces.\u003c\/li\u003e\n\u003cli\u003eDisconnect the front and rear driveshafts from the differentials.\u003c\/li\u003e\n\u003cli\u003eRemove the carrier assemblies from both differential housings. Inspect all bearings; replace carrier bearings if worn.\u003c\/li\u003e\n\u003cli\u003eIf the vehicle originally had a 3.21 factory gear ratio, replace the front carrier with a compatible 4.88 carrier before installing the new ring gear.\u003c\/li\u003e\n\u003cli\u003ePress the new 4.88 ring gears onto the carriers for both front and rear. Torque ring gear bolts to Yukon Gear specification.\u003c\/li\u003e\n\u003cli\u003ePress new pinion bearing cups and cones onto the new pinion gears. Never reuse old pinion bearings.\u003c\/li\u003e\n\u003cli\u003eSet pinion depth in each housing using the included shim pack and a dial indicator. Correct pinion depth is critical for proper gear engagement.\u003c\/li\u003e\n\u003cli\u003eInstall the pinion into each housing using the new crush sleeve. Set pinion bearing preload per the specification in the included instruction sheet.\u003c\/li\u003e\n\u003cli\u003eInstall the carrier assemblies and set ring and pinion backlash to 0.005-0.009 inch using a dial indicator, adjusting shims as needed.\u003c\/li\u003e\n\u003cli\u003eCheck gear contact pattern using gear marking compound; the pattern should be centered on the tooth face. Adjust shims if the pattern is too far toward the toe or heel.\u003c\/li\u003e\n\u003cli\u003eInstall new differential cover gaskets and reinstall the covers. Torque cover bolts to specification.\u003c\/li\u003e\n\u003cli\u003eReconnect driveshafts and fill both differentials with the correct gear oil. Road test and re-check for leaks.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003cp\u003e\u003cstrong\u003eProposition 65 Warning:\u003c\/strong\u003e This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to \u003ca href=\"https:\/\/www.p65warnings.ca.gov\"\u003ewww.p65warnings.ca.gov\u003c\/a\u003e.\u003c\/p\u003e","brand":"Yukon Gear \u0026 Axle","offers":[{"title":"Default Title","offer_id":40481871659087,"sku":"YUKYGK013","price":680.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/yukon-gear-install-kit-package-for-jeep-jk-non-rubicon-in-a-4_88-ratio-differential-install-kits-yukon-gear-axle.jpg?v=1699974741","url":"https:\/\/www.blackopsautoworks.com\/products\/yukon-gear-install-kit-package-for-jeep-jk-non-rubicon-in-a-4-88-ratio","provider":"Black Ops Auto Works","version":"1.0","type":"link"}