AXTBIRF-4340 - Toyota, 30/27 Spline Nitro Chromoly Birfield Outer Axle Joint

Nitro Gear and Axle
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These new Birfield joints are made from 4340 chromoly. The housing is larger to allow for a thicker walls. The internal parts are redesigned for more strength. The joint is cryo and heat treated and designed for rock crawling. Nitro Gear and Axle strives to provide the highest quality differential and axle components available. We take the steps necessary to ensure our parts are dependable. Our product range is continually growing to meet the needs of consumers for new ratios and applications. At Nitro we know differentials, and know what it takes to provide you with high quality components.


  • Toyota, 30/27, Nitro Chromoly Front Birfield Outer Axle Joint
  • High strength 4340 Chromoly Material featuring State of the art machining
  • Fully compatible with factory or aftermarket carriers, lockers, and locking hubs
  • Differential: Toyota
  • Axle Spline: 27 Inner, 30 At Hub
  • Axle Type: Birfield Outer Axle Joint
  • Manufacturer: Nitro Gear and Axle
  • Warranty: Lifetime
  • Sold As Each

Fits Vehicles:

  • 1969-1983 FJ40 front FJ45 front
  • 1968-1979 FJ55 front
  • 1981-1987 FJ60 front
  • HJ60 front
  • 1988-1990 FJ62 front
  • BJ70
  • 1979-1985 Toyota 4x4 Hilux Pickup Front
  • 1984-1985 Toyota 4x4 4Runner Front
  • Toyota Surf
  • Toyota LJ70 RJ70 Land Cruiser II and Prado
  • SAS Conversions


  • Made out of 100% chromoly
  • 75% increased in strength
  • Precision polished
  • Made out of 4340 chromoly steel
  • Heat-treated for superior strength


  • Axle Splines: 27 inner, 30 at hub
  • Material: 4340 Chromoly Steel
  • Manufacturer: Nitro Gear & Axle
  • Warranty: Lifetime*


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ManufacturerNitro Gear and Axle
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