{"product_id":"sumo-gear-4-7-rf1a-transfer-case-gears-toyota","title":"Sumo Gear 4.7:1 Transfer Case Gear Set | RF1A (1979-95 Pickup \/ 1985-95 4Runner)","description":"\u003ch2\u003eSumo Gear 4.7:1 Transfer Case Gear Set\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eFor 1979–1995 Toyota Pickup and 1984–1995 Toyota 4Runner 4WD with RF1A gear-driven transfer case\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eThe Sumo Gear 4.7:1 Transfer Case Gear Set is a low-range gearing upgrade for Toyota RF1A gear-driven transfer cases. It replaces the factory 2.28:1 low range with a \u003cstrong\u003e4.703:1 low range\u003c\/strong\u003e while retaining a \u003cstrong\u003e1.00:1 high range\u003c\/strong\u003e, providing substantially greater crawl control and torque multiplication without changing normal high-range gearing.\u003c\/p\u003e\n\u003cp\u003eThe gears are precision machined in Japan from \u003cstrong\u003eSCM420H alloy steel\u003c\/strong\u003e and are available in \u003cstrong\u003e21-spline and 23-spline configurations\u003c\/strong\u003e for factory RF1A applications, upgraded transfer cases, and properly configured dual-case drivetrains. Both configurations use the RF1A transfer case and the same 4.703:1 low-range ratio.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003e4.703:1 low-range ratio\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003eRetains \u003cstrong\u003e1.00:1 high range\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSCM420H alloy-steel\u003c\/strong\u003e gear construction\u003c\/li\u003e\n\u003cli\u003ePrecision machined in Japan\u003c\/li\u003e\n\u003cli\u003eAvailable in \u003cstrong\u003e21-spline and 23-spline configurations\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eDesigned specifically for Toyota \u003cstrong\u003eRF1A gear-driven transfer cases\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eSuitable for single-case and properly configured dual-case drivetrains\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eLow-Range Gearing \u0026amp; Spline Selection\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003e4.703:1 low-range ratio\u003c\/strong\u003e provides substantially deeper gearing for technical trails, rock crawling, and other low-speed off-road situations. High range remains \u003cstrong\u003e1.00:1\u003c\/strong\u003e, so highway and normal road gearing are unchanged.\u003c\/p\u003e\n\u003cp\u003eThese gears fit \u003cstrong\u003eToyota RF1A gear-driven transfer cases only\u003c\/strong\u003e. They do \u003cstrong\u003enot\u003c\/strong\u003e install into the factory chain-driven transfer cases used in other Toyota drivetrain configurations.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e21-Spline — Naturally Aspirated 4-Cylinder RF1A Applications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003e21-spline\u003c\/strong\u003e configuration is the factory-style setup used with most naturally aspirated 4-cylinder Toyota manual-transmission applications equipped with an RF1A gear-driven transfer case.\u003c\/p\u003e\n\u003cp\u003eFactory applications include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1979–1980 Toyota Pickup 4WD\u003c\/strong\u003e — 20R with manual transmission and RF1A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1981–1995 Toyota Pickup 4WD\u003c\/strong\u003e — 22R \/ 22RE with manual transmission and RF1A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1984–1995 Toyota 4Runner 4WD\u003c\/strong\u003e — 22R \/ 22RE with manual transmission and RF1A\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor an otherwise stock naturally aspirated 4-cylinder Toyota equipped with its factory \u003cstrong\u003emanual transmission and gear-driven RF1A transfer case\u003c\/strong\u003e, the \u003cstrong\u003e21-spline configuration is normally the correct selection\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e23-Spline — 1986–1987 22R-TE Turbo \/ R151F Applications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe stronger \u003cstrong\u003e23-spline\u003c\/strong\u003e RF1A configuration was used from the factory behind the \u003cstrong\u003eR151F 5-speed manual transmission\u003c\/strong\u003e in 1986–1987 22R-TE turbo applications.\u003c\/p\u003e\n\u003cp\u003eFactory applications include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1986–1987 Toyota Pickup 4WD\u003c\/strong\u003e — 22R-TE Turbo, R151F 5-speed manual\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1986–1987 Toyota 4Runner 4WD\u003c\/strong\u003e — 22R-TE Turbo, R151F 5-speed manual\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe 23-spline configuration is also commonly used in \u003cstrong\u003edual-transfer-case systems, upgraded RF1A assemblies, and drivetrain conversions\u003c\/strong\u003e because of its larger input spline.\u003c\/p\u003e\n\u003cp\u003eModified vehicles should be matched to the \u003cstrong\u003eactual transfer-case input configuration\u003c\/strong\u003e rather than selected by model year alone.\u003c\/p\u003e\n\u003cblockquote\u003e\u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e Factory \u003cstrong\u003e3.0L 3VZ-E V6\u003c\/strong\u003e applications use a chain-driven transfer case and are \u003cstrong\u003enot directly compatible\u003c\/strong\u003e with these RF1A low-range gears. A V6 vehicle can use these gears only after conversion to a properly configured RF1A gear-driven transfer case.\u003c\/p\u003e\u003c\/blockquote\u003e\n\u003chr\u003e\n\u003ch2\u003eVehicle Fitment\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1979–1983 Toyota Pickup – \u003cstrong\u003e1st Gen\u003c\/strong\u003e – 4WD – RF1A Gear-Driven Transfer Case\u003c\/li\u003e\n\u003cli\u003e1984–1988 Toyota Pickup – \u003cstrong\u003e2nd Gen\u003c\/strong\u003e – 4WD – RF1A Gear-Driven Transfer Case\u003c\/li\u003e\n\u003cli\u003e1989–1995 Toyota Pickup – \u003cstrong\u003e3rd Gen\u003c\/strong\u003e – 4WD – RF1A Gear-Driven Transfer Case\u003c\/li\u003e\n\u003cli\u003e1984–1989 Toyota 4Runner – \u003cstrong\u003e1st Gen\u003c\/strong\u003e – 4WD – RF1A Gear-Driven Transfer Case\u003c\/li\u003e\n\u003cli\u003e1990–1995 Toyota 4Runner – \u003cstrong\u003e2nd Gen\u003c\/strong\u003e – 4WD – RF1A Gear-Driven Transfer Case\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eFitment Notes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eRF1A gear-driven transfer cases only\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e4WD applications only\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e21-spline:\u003c\/strong\u003e Most naturally aspirated 20R, 22R, and 22RE manual-transmission RF1A applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e23-spline:\u003c\/strong\u003e Factory 1986–1987 22R-TE \/ R151F manual applications\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eDoes not directly fit factory 3VZ-E V6 chain-driven transfer cases\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003eAutomatic-transmission vehicles should be verified by the \u003cstrong\u003eactual transfer-case type\u003c\/strong\u003e before ordering\u003c\/li\u003e\n\u003cli\u003eModified, swapped, and dual-case vehicles must be verified by \u003cstrong\u003eactual spline count and transfer-case configuration\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eTransfer-case disassembly and gear installation require appropriate drivetrain service experience\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eProduct Specifications\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eBrand:\u003c\/strong\u003e Sumo Gear\u003cbr\u003e\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Transfer Case Low-Range Gear Set\u003cbr\u003e\u003cstrong\u003eTransfer Case:\u003c\/strong\u003e Toyota RF1A Gear-Driven\u003cbr\u003e\u003cstrong\u003eHigh-Range Ratio:\u003c\/strong\u003e 1.00:1\u003cbr\u003e\u003cstrong\u003eLow-Range Ratio:\u003c\/strong\u003e \u003cstrong\u003e4.703:1\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eSpline Options:\u003c\/strong\u003e \u003cstrong\u003e21 Spline \/ 23 Spline\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eGear Material:\u003c\/strong\u003e SCM420H Alloy Steel\u003cbr\u003e\u003cstrong\u003eManufacturing:\u003c\/strong\u003e Japan\u003cbr\u003e\u003cstrong\u003eDrivetrain:\u003c\/strong\u003e 4WD\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eAvailable Configurations\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e21-Spline\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFor matching \u003cstrong\u003e21-spline RF1A\u003c\/strong\u003e transfer-case configurations\u003c\/li\u003e\n\u003cli\u003eFactory-style configuration for most naturally aspirated 4-cylinder manual applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e23-Spline\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFor matching \u003cstrong\u003e23-spline RF1A\u003c\/strong\u003e transfer-case configurations\u003c\/li\u003e\n\u003cli\u003eFactory configuration for \u003cstrong\u003e1986–1987 22R-TE Turbo \/ R151F 5-speed\u003c\/strong\u003e applications\u003c\/li\u003e\n\u003cli\u003eAlso used in properly configured upgraded and dual-case systems\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Sumo Gear","offers":[{"title":"21-Spline","offer_id":53582469366069,"sku":null,"price":684.25,"currency_code":"USD","in_stock":true},{"title":"23-Spline","offer_id":53582469398837,"sku":null,"price":684.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/6005\/8421\/files\/1logos_1_29de48eb-5c00-44e0-9204-54fb8a0c8acf.png?v=1789603933","url":"https:\/\/preserverad.com\/products\/sumo-gear-4-7-rf1a-transfer-case-gears-toyota","provider":"Preserve Rad","version":"1.0","type":"link"}