{"product_id":"longfield-30-spline-gun-drilled-birfield-axle-super-set-toyota-pickup-4runner","title":"Longfield 30-Spline Gun-Drilled Birfield \u0026 Axle Super Set | Solid Axle (1979-85 Pickup \/ 1984-85 4Runner)","description":"\u003ch2 class=\"PDq2pG_selectionAnchorContainer\"\u003eLongfield 30-Spline Gun-Drilled Birfield \u0026amp; Axle Super Set\u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eFor 1979–1985 Toyota Pickup 4WD \u0026amp; 1984–1985 Toyota 4Runner 4WD Solid Front Axle Applications\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eLongfield 30-Spline Gun-Drilled Birfield \u0026amp; Axle Super Set\u003c\/strong\u003e is a heavy-duty front axle upgrade for Toyota solid front axle applications. The set combines 30-spline Longfield birfields with 4340 chromoly axle shafts, upgraded hub components, and multiple axle-width configurations.\u003c\/p\u003e\n\u003cp\u003eThe birfields feature forged 4340 chromoly housings, dual heat-treated 4340 chromoly internals, and a gun-drilled grease passage that allows lubricant to reach the internal components through an M8 grease fitting at the end of the stub shaft. A Machined Spline Saver reduces stress concentration near the stub-shaft splines.\u003c\/p\u003e\n\u003cp\u003eStandard-width, +3-inch, and +5-inch configurations are available for factory Toyota and Rock Assault solid axle setups.\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\u003eDual heat-treated \u003cstrong\u003e4340 chromoly internal components\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 birfield construction\u003c\/li\u003e\n\u003cli\u003eGun-drilled internal grease passage\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eM8 grease zerk\u003c\/strong\u003e for easier birfield lubrication\u003c\/li\u003e\n\u003cli\u003eMachined Spline Saver reduces stress concentration near the splines\u003c\/li\u003e\n\u003cli\u003eIncludes chromoly inner and outer hub gears\u003c\/li\u003e\n\u003cli\u003eIncludes Creeper Drive Flanges\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eGun-Drilled Birfield Design\u003c\/h2\u003e\n\u003cp\u003eThe gun-drilled design creates a grease passage through the center of the birfield. Grease can be supplied through the M8 fitting at the end of the stub shaft, allowing the birfield internals to be serviced without disassembling the axle simply to access the joint.\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eMachined Spline Saver\u003c\/strong\u003e uses a shallow relief near the stub-shaft splines to reduce stress concentration at the spline groove, a common high-load area on birfield stub shafts.\u003c\/p\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\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\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eFitment Notes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eSolid front axle applications only\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 a factory Toyota IFS front suspension\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003eThe \u003cstrong\u003eIFS Hub Gears\u003c\/strong\u003e configuration refers to the hub gear setup and does not indicate compatibility with a factory IFS axle\u003c\/li\u003e\n\u003cli\u003eStandard-width configurations use 15-7\/16-inch short-side and 31-7\/16-inch long-side axle shafts\u003c\/li\u003e\n\u003cli\u003e+3-inch configuration uses an 18-7\/16-inch short-side and 31-7\/16-inch long-side axle shaft\u003c\/li\u003e\n\u003cli\u003e+5-inch configuration uses a 19-7\/16-inch short-side and 32-7\/16-inch long-side axle shaft\u003c\/li\u003e\n\u003cli\u003eSelect the axle width and hub gear configuration that matches the front axle housing being used\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 Birfield \u0026amp; Axle Super Set\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\u003eHeat Treatment:\u003c\/strong\u003e Dual Heat-Treated Birfield Internals\u003cbr\u003e\u003cstrong\u003eAxle Shaft Material:\u003c\/strong\u003e 4340 Chromoly Steel\u003cbr\u003e\u003cstrong\u003eGrease Fitting:\u003c\/strong\u003e M8 Zerk\u003cbr\u003e\u003cstrong\u003eBirfield Design:\u003c\/strong\u003e Gun-Drilled\u003cbr\u003e\u003cstrong\u003eSpline Design:\u003c\/strong\u003e Machined Spline Saver\u003cbr\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e Lifetime Warranty\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2 class=\"PDq2pG_selectionAnchorContainer\"\u003eLongfield Gun-Drilled Super Set vs. Birfield \u0026amp; Axle Kit\u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eGun-Drilled Super Set\u003c\/strong\u003e is the more comprehensive Longfield front axle package for Toyota-style solid axle builds. It features dual heat-treated 30-spline birfields, gun-drilled grease passages, M8 grease fittings, Machined Spline Savers, 4340 chromoly axle shafts, chromoly hub gears, Creeper Drive Flanges, and a lifetime warranty.\u003c\/p\u003e\n\u003cp\u003eThe \u003ca href=\"https:\/\/preserverad.com\/products\/longfield-30-spline-birfield-axle-kit-toyota-pickup-4runner?_pos=1\u0026amp;_fid=94829c603\u0026amp;_ss=c\" target=\"_blank\" rel=\"noopener\"\u003e\u003cstrong\u003e30-Spline Birfield \u0026amp; Axle Kit\u003c\/strong\u003e\u003c\/a\u003e is the more affordable option for customers who want the strength of 30-spline Longfield birfields and 4340 chromoly axle shafts without the additional hub components and gun-drilled features included with the Super Set. It uses single heat-treated birfields and carries a 12-month limited warranty.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eAvailable Configurations\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eStandard Width — Standard \/ Manual Hub Gears\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e15-7\/16-inch short-side axle shaft\u003c\/li\u003e\n\u003cli\u003e31-7\/16-inch long-side axle shaft\u003c\/li\u003e\n\u003cli\u003eStandard solid-axle hub gear configuration\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eStandard Width — IFS Hub Gears\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e15-7\/16-inch short-side axle shaft\u003c\/li\u003e\n\u003cli\u003e31-7\/16-inch long-side axle shaft\u003c\/li\u003e\n\u003cli\u003eIFS hub gear configuration\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eStill designed for a solid front axle; this option does not fit a factory IFS front suspension\u003c\/strong\u003e\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\u003e18-7\/16-inch short-side axle shaft\u003c\/li\u003e\n\u003cli\u003e31-7\/16-inch long-side axle shaft\u003c\/li\u003e\n\u003cli\u003eFor applicable +3-inch-width solid front axle configurations\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\u003e19-7\/16-inch short-side axle shaft\u003c\/li\u003e\n\u003cli\u003e32-7\/16-inch long-side axle shaft\u003c\/li\u003e\n\u003cli\u003eFor applicable +5-inch-width solid front axle configurations\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Longfield","offers":[{"title":"Standard Width – Solid Axle Hub Gears","offer_id":53539088597301,"sku":null,"price":911.42,"currency_code":"USD","in_stock":true},{"title":"Standard Width – IFS Hub Gears","offer_id":53539088630069,"sku":null,"price":911.42,"currency_code":"USD","in_stock":true},{"title":"+3\" Width – Solid Axle Hub Gears","offer_id":53539088662837,"sku":null,"price":911.42,"currency_code":"USD","in_stock":true},{"title":"+5\" Width – Solid Axle Hub Gears","offer_id":53539088695605,"sku":null,"price":911.42,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/6005\/8421\/files\/ChatGPTImageSep11_2026_05_50_19PM.png?v=1789163421","url":"https:\/\/preserverad.com\/products\/longfield-30-spline-gun-drilled-birfield-axle-super-set-toyota-pickup-4runner","provider":"Preserve Rad","version":"1.0","type":"link"}