{"product_id":"arb-differential-carrier-conversion-bearing-45mm-to-50mm-1979-95-4runner-pickup","title":"ARB Differential Carrier Conversion Bearing | 45mm to 50mm (1979-95 4Runner\/Pickup)","description":"\u003ch2\u003eARB Differential Carrier Conversion Bearing | 45mm to 50mm\u003c\/h2\u003e\n\u003cp\u003eFor \u003cstrong\u003e1979–1995 Toyota 4Runner\u003c\/strong\u003e \u0026amp; \u003cstrong\u003e1979-1995 Toyota Pickup Equipped with a 20R, 22R,and 22RE Engines and Toyota 8-Inch Differential\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eUpgrade your Toyota 8-inch differential with the \u003cstrong\u003eARB 45mm to 50mm Differential Carrier Conversion Bearing\u003c\/strong\u003e, engineered specifically for converting early Toyota 8-inch differentials with \u003cstrong\u003e45mm carrier bearing journals\u003c\/strong\u003e to accept \u003cstrong\u003e50mm carrier journal differentials\u003c\/strong\u003e, including compatible ARB Air Lockers and other V6-style differential carriers.\u003c\/p\u003e\n\u003cp\u003eThis premium tapered roller bearing is commonly used when installing an \u003cstrong\u003eARB Air Locker\u003c\/strong\u003e or other \u003cstrong\u003e50mm carrier\u003c\/strong\u003e into a factory four-cylinder Toyota 8-inch differential originally equipped with 45mm carrier bearings. The conversion allows earlier Toyota differential housings to accept the stronger, later-style carrier while maintaining proper bearing support and differential alignment.\u003c\/p\u003e\n\u003cp\u003eManufactured to ARB's specifications, these heavy-duty conversion bearings are designed to withstand the demanding radial and axial loads encountered during daily driving, towing, rock crawling, overlanding, and off-road use.\u003c\/p\u003e\n\u003cp\u003eAvailable individually or as a complete pair, these bearings are an excellent choice for differential rebuilds, gear changes, carrier replacements, and ARB Air Locker installations.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eWhy Use 45mm to 50mm Conversion Bearings?\u003c\/h2\u003e\n\u003cp\u003eMany Toyota 8-inch differentials originally equipped with four-cylinder engines utilize \u003cstrong\u003e45mm carrier bearing journals\u003c\/strong\u003e, while later V6 differential carriers and many ARB Air Lockers are manufactured with \u003cstrong\u003e50mm carrier journals\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eRather than replacing the entire axle housing, these conversion bearings allow the larger carrier to be installed into the original housing.\u003c\/p\u003e\n\u003cp\u003eThis conversion is commonly performed when upgrading to:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eARB Air Lockers\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eV6 Toyota differential carriers\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAftermarket locking differentials\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePerformance differential carriers\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHeavy-duty off-road differential builds\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eGenuine ARB differential carrier conversion bearing\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eConverts 45mm Toyota carrier journals to accept 50mm carriers\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePremium tapered roller bearing construction\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePrecision-ground bearing races\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHardened steel tapered rollers\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDesigned for Toyota 8-inch differentials\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eExcellent for ARB Air Locker installations\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIdeal for differential rebuilds and gear changes\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSupports high-load off-road applications\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAvailable individually or as a pair\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eBenefits\u003c\/h2\u003e\n\u003cp\u003eReplacing worn carrier bearings or installing new conversion bearings during a differential rebuild helps restore proper differential operation while providing the correct support for the carrier assembly.\u003c\/p\u003e\n\u003cp\u003eBenefits include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eSmooth and quiet differential operation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eProper carrier support under heavy loads\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMaintains correct carrier alignment\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHelps maintain proper bearing preload\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSupports accurate ring-and-pinion gear setup\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIncreased durability for off-road applications\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRecommended during differential rebuilds and locker installations\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003ePremium Tapered Roller Bearing Construction\u003c\/h2\u003e\n\u003cp\u003eARB conversion bearings utilize a tapered roller bearing design capable of supporting both radial and axial loads generated inside the differential.\u003c\/p\u003e\n\u003cp\u003eThe precision-ground races and hardened steel rollers are designed for long service life while maintaining consistent bearing preload and smooth carrier rotation.\u003c\/p\u003e\n\u003ch3\u003eConstruction Highlights\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003ePrecision-ground bearing races\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHardened steel tapered rollers\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHeavy-duty bearing cage\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHigh-strength bearing steel\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eManufactured to ARB quality standards\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDesigned for demanding off-road use\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eDesigned for 45mm to 50mm Differential Conversions\u003c\/h2\u003e\n\u003cp\u003eThese conversion bearings are intended for Toyota 8-inch differentials originally equipped with \u003cstrong\u003e45mm carrier bearing journals\u003c\/strong\u003e that are being upgraded to a \u003cstrong\u003e50mm carrier\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eARB specifically recommends using this \u003cstrong\u003e45mm to\u003c\/strong\u003e \u003cstrong\u003e50mm carrier bearing\u003c\/strong\u003e when installing a later-model Air Locker into earlier Toyota housings equipped with 45mm carrier bearings.\u003c\/p\u003e\n\u003cp\u003eBecause carrier bearing size is determined by the differential carrier—not simply the vehicle year—it is important to verify the carrier journal diameter before ordering.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIf your vehicle originally came equipped with a factory 50mm carrier (including most V6-equipped applications and  22R-TE models), these conversion bearings will NOT fit.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003ePlease purchase our standard \u003cstrong\u003e50mm ARB Carrier Bearing\u003c\/strong\u003e listing instead. \u003ca href=\"https:\/\/preserverad.com\/products\/arb-50mm-differential-carrier-bearing-1985-95-4runner-pickup\" rel=\"noopener\" target=\"_blank\"\u003eClick here.\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eAlways verify your carrier bearing journal diameter before ordering.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eProfessional Installation\u003c\/h2\u003e\n\u003cp\u003eCarrier bearing installation requires complete differential disassembly and proper differential setup.\u003c\/p\u003e\n\u003cp\u003eProfessional installation is strongly recommended.\u003c\/p\u003e\n\u003cp\u003eDuring installation:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eReplace both carrier bearings together.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eReplace bearing races if worn or damaged.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eReset carrier bearing preload.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eVerify ring-and-pinion backlash.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eVerify gear tooth contact pattern.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eTorque all fasteners to factory specifications.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFollow ARB installation procedures when installing an Air Locker.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eTwo bearings are required for one complete differential rebuild.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eCommon Applications\u003c\/h2\u003e\n\u003cp\u003eCommonly used during:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eARB Air Locker installations\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eToyota 8-inch differential rebuilds\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCarrier replacements\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRing-and-pinion gear installations\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eGear ratio changes\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOff-road axle upgrades\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOverland vehicle builds\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRock crawling differentials\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHeavy-duty Toyota rear axle rebuilds\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eVehicle Compatibility\u003c\/h2\u003e\n\u003cp\u003eThese conversion bearings fit \u003cstrong\u003eToyota 8-inch differentials originally equipped with 45mm carrier bearing journals\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eToyota Pickup\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1979–1983 1st Gen Toyota Pickup\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003e20R \u0026amp; 22R models\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eToyota 8-inch rear differential\u003cstrong\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1984–1988 2nd Gen Toyota Pickup\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003e22R \u0026amp; 22RE models\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eToyota 8-inch rear differential\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1989–1995 3rd Gen Toyota Pickup\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003e22RE models\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eToyota 8-inch rear differential\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eToyota 4Runner\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1984–1989 1st Gen Toyota 4Runner\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003e22R \u0026amp; 22RE models\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eToyota 8-inch rear differential\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1990–1995 2nd Gen Toyota 4Runner\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003e22RE models\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eToyota 8-inch rear differential\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eFitment Exclusions\u003c\/h2\u003e\n\u003cp\u003eThese conversion bearings are \u003cstrong\u003enot\u003c\/strong\u003e intended for:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eFactory 50mm carrier journals\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e3VZ-E V6 differentials\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e22R-TE differentials \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eToyota 7.5-inch front IFS differentials\u003cbr\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eWhat's Included\u003c\/h2\u003e\n\u003cp class=\"PDq2pG_selectionAnchorContainer\"\u003eChoose the option that best fits your project:\u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle Bearing\u003c\/strong\u003e – Includes one (1) genuine ARB 45mm to 50mm carrier bearing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePair of Bearings\u003c\/strong\u003e – Includes two (2) genuine ARB 45mm to 50mm carrier bearings for one complete differential rebuild\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ARB | Old Man EMU","offers":[{"title":"Single Bearing (1 Bearing)","offer_id":53226945413429,"sku":"530","price":78.0,"currency_code":"USD","in_stock":true},{"title":"Complete Pair \/ Differential Set (2 Bearings)","offer_id":53226945446197,"sku":"531","price":156.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/6005\/8421\/files\/ChatGPTImageJul29_2026_09_03_24PM.png?v=1785373415","url":"https:\/\/preserverad.com\/products\/arb-differential-carrier-conversion-bearing-45mm-to-50mm-1979-95-4runner-pickup","provider":"Preserve Rad","version":"1.0","type":"link"}