{"product_id":"yukon-gear-grizzly-locker-ford-10-25in-10-5in-w-35-splines","title":"Yukon Gear Grizzly Locker \/ Ford 10.25in \u0026 10.5in w\/ 35 Splines","description":"\u003ch4\u003eYukon Gear Grizzly Locker for Ford 10.25 Inch and 10.5 Inch Differential with 35 Spline Axles\u003c\/h4\u003e\n\u003cp\u003ePart number YGLF10.25-35 is an automatic locking differential built for Ford 10.25 inch and 10.5 inch Sterling rear axle housings equipped with 35 spline axle shafts. The YGLF10.25-35 Grizzly Locker delivers true 100 percent lockup under torque across a massive range of Ford applications including F-250, F-350, E-Series vans, and Excursion models. Whether you are navigating off-road terrain, pulling heavy loads, or simply need maximum traction, the YGLF10.25-35 is engineered to outperform limited-slip units in demanding conditions. The locker disengages smoothly during normal turns on pavement for everyday drivability.\u003c\/p\u003e\n\n\u003ch4\u003eFeatures and Benefits\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eFits Ford 10.25 inch and 10.5 inch Sterling rear differentials with 35 spline axles\u003c\/li\u003e\n  \u003cli\u003eFull mechanical lockup activates automatically under throttle torque\u003c\/li\u003e\n  \u003cli\u003ePrecision-machined steel construction for heavy-duty load capacity\u003c\/li\u003e\n  \u003cli\u003eDirect drop-in installation into the existing carrier bore\u003c\/li\u003e\n  \u003cli\u003eDisengages on light throttle during turns for normal street behavior\u003c\/li\u003e\n  \u003cli\u003eCompatible with gear ratios from 3.55 and up\u003c\/li\u003e\n  \u003cli\u003eCovers an extensive range of Ford truck, van, and SUV applications\u003c\/li\u003e\n  \u003cli\u003eBacked by Yukon Gear manufacturer limited warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eVehicle Fitment\u003c\/h4\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\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\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003e1999\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eF-250 Super Duty\u003c\/td\u003e\n\u003ctd\u003eXL\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e2000\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eF-250 Super Duty\u003c\/td\u003e\n\u003ctd\u003eXL\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e2001\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eF-250 Super Duty\u003c\/td\u003e\n\u003ctd\u003eXL\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e2002\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eF-250 Super Duty\u003c\/td\u003e\n\u003ctd\u003eXL\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e2003\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eF-250 Super Duty\u003c\/td\u003e\n\u003ctd\u003eXL\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e2004\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eF-250 Super Duty\u003c\/td\u003e\n\u003ctd\u003eXL\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e2005\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eF-250 Super Duty\u003c\/td\u003e\n\u003ctd\u003eXL\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e1999\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eF-250 Super Duty\u003c\/td\u003e\n\u003ctd\u003eXLT\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e2000\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eF-250 Super Duty\u003c\/td\u003e\n\u003ctd\u003eXLT\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e2001\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eF-250 Super Duty\u003c\/td\u003e\n\u003ctd\u003eXLT\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e1999\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eF-250 Super Duty\u003c\/td\u003e\n\u003ctd\u003eLariat\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e2000\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eF-250 Super Duty\u003c\/td\u003e\n\u003ctd\u003eLariat\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e2001\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eF-250 Super Duty\u003c\/td\u003e\n\u003ctd\u003eLariat\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e2002\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eF-250 Super Duty\u003c\/td\u003e\n\u003ctd\u003eLariat\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e1999\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eF-350 Super Duty\u003c\/td\u003e\n\u003ctd\u003eXL\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e2000\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eF-350 Super Duty\u003c\/td\u003e\n\u003ctd\u003eXL\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e2001\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eF-350 Super Duty\u003c\/td\u003e\n\u003ctd\u003eXL\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e1999\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eF-350 Super Duty\u003c\/td\u003e\n\u003ctd\u003eXLT\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e2000\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eF-350 Super Duty\u003c\/td\u003e\n\u003ctd\u003eXLT\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e2001\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eF-350 Super Duty\u003c\/td\u003e\n\u003ctd\u003eXLT\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e2002\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eF-350 Super Duty\u003c\/td\u003e\n\u003ctd\u003eXLT\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e1999\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eF-350 Super Duty\u003c\/td\u003e\n\u003ctd\u003eLariat\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e2000\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eF-350 Super Duty\u003c\/td\u003e\n\u003ctd\u003eLariat\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e2001\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eF-350 Super Duty\u003c\/td\u003e\n\u003ctd\u003eLariat\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e2003\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eF-350 Super Duty\u003c\/td\u003e\n\u003ctd\u003eKing Ranch\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e2004\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eF-350 Super Duty\u003c\/td\u003e\n\u003ctd\u003eKing Ranch\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e2005\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eF-350 Super Duty\u003c\/td\u003e\n\u003ctd\u003eKing Ranch\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e1999\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eE-350 Super Duty\u003c\/td\u003e\n\u003ctd\u003eXL\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e2000\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eE-350 Super Duty\u003c\/td\u003e\n\u003ctd\u003eXL\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e2001\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eE-350 Super Duty\u003c\/td\u003e\n\u003ctd\u003eXL\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e2000\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eExcursion\u003c\/td\u003e\n\u003ctd\u003eXLT\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e2001\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eExcursion\u003c\/td\u003e\n\u003ctd\u003eXLT\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e2002\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eExcursion\u003c\/td\u003e\n\u003ctd\u003eXLT\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e2000\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eExcursion\u003c\/td\u003e\n\u003ctd\u003eLimited\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e2001\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eExcursion\u003c\/td\u003e\n\u003ctd\u003eLimited\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e2002\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eExcursion\u003c\/td\u003e\n\u003ctd\u003eLimited\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e1985\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eF-250\u003c\/td\u003e\n\u003ctd\u003eXL\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e1997\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eF-250\u003c\/td\u003e\n\u003ctd\u003eLariat\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e1998\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eF-250\u003c\/td\u003e\n\u003ctd\u003eLariat\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e1999\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eF-250\u003c\/td\u003e\n\u003ctd\u003eLariat\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\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003eYGLF10.25-35\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eUPC\u003c\/td\u003e\n\u003ctd\u003e883584147206\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDifferential Housing\u003c\/td\u003e\n\u003ctd\u003eFord 10.25 inch and 10.5 inch Sterling\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSpline Count\u003c\/td\u003e\n\u003ctd\u003e35\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eLocker Type\u003c\/td\u003e\n\u003ctd\u003eMechanical automatic locking differential\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eHigh-strength alloy steel\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eFinish\u003c\/td\u003e\n\u003ctd\u003eNatural machined\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCarrier Break\u003c\/td\u003e\n\u003ctd\u003e3.55 and up\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003eYukon Gear manufacturer limited warranty\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch4\u003eWhat Is Included\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eOne Grizzly Locker differential assembly (YGLF10.25-35)\u003c\/li\u003e\n  \u003cli\u003eAll internal locking hardware and cross pins\u003c\/li\u003e\n  \u003cli\u003eInstallation instruction sheet\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eFrequently Asked Questions\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eDoes YGLF10.25-35 affect my vehicle warranty under federal law?\u003c\/strong\u003e\u003cbr\u003e\nUnder the Magnuson-Moss Warranty Act, your factory warranty cannot be voided simply for installing an aftermarket differential. The dealer must prove the aftermarket component directly caused the specific failure being claimed.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow do I confirm I have a 10.25 inch versus a 10.5 inch Ford axle?\u003c\/strong\u003e\u003cbr\u003e\nThe 10.25 inch axle was used in older F-250 and E-350 models through the 1990s. The 10.5 inch Sterling axle appears in 1999-and-newer Super Duty trucks. Both use the same YGLF10.25-35 carrier. The ring gear diameter measurement from the center of the gear bolt circle will confirm your housing size.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWill YGLF10.25-35 work with my current ring and pinion ratio?\u003c\/strong\u003e\u003cbr\u003e\nYes, as long as your ratio is 3.55 or numerically higher. This locker drops into the standard carrier bore without requiring you to change the ring and pinion.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat kind of ratcheting noise should I expect on turns?\u003c\/strong\u003e\u003cbr\u003e\nMechanical lockers like YGLF10.25-35 produce a clicking or ratcheting sound during slow, tight turns. This is normal operation as the cams disengage to allow differentiation. The sound is more pronounced on dry pavement during sharp turns.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIs professional installation required?\u003c\/strong\u003e\u003cbr\u003e\nYukon Gear strongly recommends professional installation. Proper carrier bearing preload and ring gear backlash must be set to factory tolerances using dial indicators and pattern compound to ensure long component life.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan I use synthetic gear oil with YGLF10.25-35?\u003c\/strong\u003e\u003cbr\u003e\nYes. Full synthetic 75W-140 or 80W-90 gear oil meeting Ford specification is compatible. Do not use limited-slip friction modifier, as YGLF10.25-35 is not a clutch-type unit.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWill this locker affect my tow rating?\u003c\/strong\u003e\u003cbr\u003e\nYGLF10.25-35 does not reduce your vehicle tow rating. In fact, the improved traction can benefit towing on loose or slippery surfaces. Ensure your vehicle is otherwise in factory operating condition.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat warranty does the YGLF10.25-35 carry?\u003c\/strong\u003e\u003cbr\u003e\nYukon Gear provides a manufacturer limited warranty against defects in materials and workmanship. Warranty is void if the product was improperly installed or used outside its designed application.\u003c\/p\u003e\n\n\u003ch4\u003eInstallation Instructions\u003c\/h4\u003e\n\u003col\u003e\n  \u003cli\u003eLift and support the vehicle safely. Drain the differential fluid completely.\u003c\/li\u003e\n  \u003cli\u003eRemove rear axle shafts by unbolting the retainer flange hardware.\u003c\/li\u003e\n  \u003cli\u003eRemove the differential cover and thoroughly clean the mating surface.\u003c\/li\u003e\n  \u003cli\u003eMark and remove the carrier bearing caps. Note orientation for reinstallation.\u003c\/li\u003e\n  \u003cli\u003eRemove the existing carrier assembly from the housing.\u003c\/li\u003e\n  \u003cli\u003ePress off the ring gear and carrier bearings from the old carrier.\u003c\/li\u003e\n  \u003cli\u003eTransfer the ring gear onto the YGLF10.25-35 Grizzly Locker using a press and proper adapters.\u003c\/li\u003e\n  \u003cli\u003eInstall new carrier bearings onto the Grizzly Locker assembly.\u003c\/li\u003e\n  \u003cli\u003eSet the assembled Grizzly Locker into the housing and install bearing caps finger-tight.\u003c\/li\u003e\n  \u003cli\u003eAdjust ring gear backlash with shims to 0.005 to 0.009 inch. Confirm with a dial indicator.\u003c\/li\u003e\n  \u003cli\u003eCheck the gear contact pattern with marking compound and make shim corrections as needed.\u003c\/li\u003e\n  \u003cli\u003eTorque bearing cap bolts to the Ford factory specification.\u003c\/li\u003e\n  \u003cli\u003eInstall the differential cover with new sealant or gasket and torque to spec.\u003c\/li\u003e\n  \u003cli\u003eReinstall axle shafts and retainer hardware. Torque to factory spec.\u003c\/li\u003e\n  \u003cli\u003eFill the differential to the correct fluid level and road-test 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":40481873461327,"sku":"YUKYGLF10.25-35","price":1262.89,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/yukon-gear-grizzly-locker-ford-10_25in-10_5in-w-35-splines-differentials-yukon-gear-axle.jpg?v=1699975024","url":"https:\/\/www.blackopsautoworks.com\/products\/yukon-gear-grizzly-locker-ford-10-25in-10-5in-w-35-splines","provider":"Black Ops Auto Works","version":"1.0","type":"link"}