{"product_id":"longfield-30-spline-birfield-axle-kit-toyota-pickup-4runner","title":"Longfield 30-Spline Birfield \u0026 Axle Kit | Solid Axle (1979-95 Pickup \/ 1984-95 4Runner)","description":"\u003ch2 class=\"PDq2pG_selectionAnchorContainer\"\u003eLongfield 30-Spline Birfield \u0026amp; Axle Kit\u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eFor 1979–1995 Toyota Pickup \u0026amp; 1984–1995 Toyota 4Runner 4WD with Toyota-Style Solid Front Axle\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eLongfield 30-Spline Birfield \u0026amp; Axle Kit\u003c\/strong\u003e is a heavy-duty front axle upgrade for Toyota-style solid front axle applications. The kit replaces the factory-style 27-spline birfield and axle arrangement with \u003cstrong\u003e30-spline Longfield birfields and 4340 chromoly axle shafts\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eThe birfield housings are forged from 4340 chromoly steel, while the internal components are heat-treated for increased strength. Precision-polished birfields help reduce imperfections that can create stress risers under high loads.\u003c\/p\u003e\n\u003cp\u003eThe kit fits factory solid-axle Toyota trucks through 1985 and can also be used on \u003cstrong\u003e1986–1995 Pickup and 4Runner solid axle conversions\u003c\/strong\u003e using the appropriate Toyota-style solid front axle housing. Standard, +3-inch, and +5-inch configurations support factory-width and widened axle builds.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003e30-spline Longfield birfields\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003eForged \u003cstrong\u003e4340 chromoly birfield housings\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eHeat-treated \u003cstrong\u003e4340 chromoly birfield internals\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e4340 chromoly axle shafts\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003ePrecision-polished birfields help reduce stress risers\u003c\/li\u003e\n\u003cli\u003eRated approximately \u003cstrong\u003e76% stronger than stock axles\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eUp to \u003cstrong\u003e40 degrees of birfield steering angle\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eRated breaking point of approximately \u003cstrong\u003e8,900–9,000 ft-lbs\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eStandard, +3-inch, and +5-inch axle-width configurations\u003c\/li\u003e\n\u003cli\u003eIncludes birfields, front axle shafts, and C-clips\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eVehicle Fitment\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eToyota Pickup\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e1979–1983 Toyota Pickup – \u003cstrong\u003e1st Gen – 4WD – Factory Solid Front Axle\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e1984–1985 Toyota Pickup – \u003cstrong\u003e2nd Gen – 4WD – Factory Solid Front Axle\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e1986–1988 Toyota Pickup – \u003cstrong\u003e2nd Gen – 4WD – Toyota-Style Solid Axle Conversion\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e1989–1995 Toyota Pickup – \u003cstrong\u003e3rd Gen – 4WD – Toyota-Style Solid Axle Conversion\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eToyota 4Runner\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e1984–1985 Toyota 4Runner – \u003cstrong\u003e1st Gen – 4WD – Factory Solid Front Axle\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e1986–1989 Toyota 4Runner – \u003cstrong\u003e1st Gen – 4WD – Toyota-Style Solid Axle Conversion\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e1990–1995 Toyota 4Runner – \u003cstrong\u003e2nd Gen – 4WD – Toyota-Style Solid Axle Conversion\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eFitment Notes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003e4WD solid front axle applications only\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e1979–1985 Pickup and 1984–1985 4Runner applications use the factory Toyota solid front axle\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e1986–1995 applications require a Toyota-style solid front axle conversion\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003eFits Toyota solid front axle housings\u003c\/li\u003e\n\u003cli\u003eFits Trail-Gear Rock Assault front axle housings\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eDoes not fit the factory IFS front suspension\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003eUpgrades the factory-style 27-spline birfield and axle arrangement to 30-spline components\u003c\/li\u003e\n\u003cli\u003eSelect the axle width that matches the front axle housing being used\u003c\/li\u003e\n\u003cli\u003eStandard Width is designed for factory-width solid axle applications\u003c\/li\u003e\n\u003cli\u003e+3\" and +5\" configurations are designed for corresponding widened solid axle setups\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 Longfield\u003cbr\u003e\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Front Birfield \u0026amp; Axle Kit\u003cbr\u003e\u003cstrong\u003ePosition:\u003c\/strong\u003e Front\u003cbr\u003e\u003cstrong\u003eAxle Type:\u003c\/strong\u003e Toyota-Style Solid Front Axle\u003cbr\u003e\u003cstrong\u003eBirfield Spline Count:\u003c\/strong\u003e 30-Spline\u003cbr\u003e\u003cstrong\u003eBirfield Housing Material:\u003c\/strong\u003e Forged 4340 Chromoly Steel\u003cbr\u003e\u003cstrong\u003eBirfield Internal Material:\u003c\/strong\u003e 4340 Chromoly Steel\u003cbr\u003e\u003cstrong\u003eAxle Shaft Material:\u003c\/strong\u003e 4340 Chromoly Steel\u003cbr\u003e\u003cstrong\u003eBirfield Heat Treatment:\u003c\/strong\u003e Single Heat-Treated\u003cbr\u003e\u003cstrong\u003eMaximum Steering Angle:\u003c\/strong\u003e Up to 40 Degrees\u003cbr\u003e\u003cstrong\u003eRated Breaking Point:\u003c\/strong\u003e Approximately 8,900–9,000 ft-lbs\u003cbr\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e 12-Month Limited Warranty\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eLongfield Birfield \u0026amp; Axle Kit vs. Gun-Drilled Super Set\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003e30-Spline Birfield \u0026amp; Axle Kit\u003c\/strong\u003e is the more affordable Longfield option for Toyota-style solid front axle builds using the factory-style 27-spline birfield and axle arrangement. It uses 4340 chromoly axle shafts and single heat-treated 30-spline birfields.\u003c\/p\u003e\n\u003cp\u003eThe \u003ca href=\"https:\/\/preserverad.com\/products\/longfield-30-spline-gun-drilled-birfield-axle-super-set-toyota-pickup-4runner?_pos=2\u0026amp;_fid=2f6f5b183\u0026amp;_ss=c\" target=\"_blank\" rel=\"noopener\"\u003e\u003cstrong\u003eGun-Drilled Super Set\u003c\/strong\u003e\u003c\/a\u003e adds dual heat-treated birfield internals, gun-drilled grease passages, M8 grease fittings, Machined Spline Savers, chromoly hub gears, Creeper Drive Flanges, and a lifetime warranty. It is better suited to customers looking for the more comprehensive Longfield front axle package.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eAvailable Configurations\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eStandard Width\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFor factory-width Toyota-style solid front axle applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e+3\" Width\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFor corresponding +3-inch widened solid front axle applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e+5\" Width\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFor corresponding +5-inch widened solid front axle applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eWhat's Included\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e(2) Longfield 30-spline birfields\u003c\/li\u003e\n\u003cli\u003e(2) 4340 chromoly front axle shafts\u003c\/li\u003e\n\u003cli\u003eC-clips\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Longfield","offers":[{"title":"Standard Width","offer_id":53550869446965,"sku":null,"price":709.65,"currency_code":"USD","in_stock":true},{"title":"+3\" Width","offer_id":53550869479733,"sku":null,"price":741.89,"currency_code":"USD","in_stock":true},{"title":"+5\" Width","offer_id":53550869512501,"sku":null,"price":741.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/6005\/8421\/files\/ChatGPTImageSep11_2026_05_50_19PM_fb9afd87-f5b5-4591-8e97-6595b383d2ef.png?v=1789232406","url":"https:\/\/preserverad.com\/products\/longfield-30-spline-birfield-axle-kit-toyota-pickup-4runner","provider":"Preserve Rad","version":"1.0","type":"link"}