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2005-2016 Ford Super Duty Dana 60 1550 Chromoly Axle Shaft Kit – 40 Spline

Sku: D60-FORD-1550-40

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The ultimate axle shaft kit is now available for your 2005-2016 Ford F-250 / F-350 Super Duty Dana 60 front axle. Forged from high strength 4340 chromoly and heat treated for ultimate strength. The axle shafts are available in both 35 spline and 40 spline (see other product listing for 35 spline). U-Joint options include Spicer Non-Greasable 1550 U-Joints with full circle snap rings or billet chromoly Branik Legacy Pro Series 1550 U-Joints for hardcore applications. Stub shafts are compatible with the OE knuckle vacuum seal.   

Kit Includes:

  • 40 Spline Chromoly Inner Axle Shafts
  • 40 Spline Chromoly Outer Stub Shafts
  • Optional: Dana Spicer 1550 Non-Greasable U-Joints w/Full Circle Snap Rings
  • Optional: Branik Legacy Pro Series 1550 U-Joints (Off-Road Use Only)
  • Optional: 40 Spline Drive Flange Kit to Replace Locking Hubs (Required – not compatible with locking hubs)
  • Optional: Replacement Knuckle Vacuum Seals


*Kit ships unassembled. 

Optional Next Generation Rear 40 Spline Assembly.18 months of design, engineering and testing, resulted in the industries strongest 40 spline rear assembly. The design completed rigorous FEA testing and analysis.
- Forged chromolyspindles, hubs, and axle shafts
- Forged spindles have 4x more yield strengththan 35 spline spindles
- Hubs with over 80,000 psi yield strength to match the spindles
- Tone rings integrated into the hub
- Forged 4340 chromoly 40 spline axle shafts that are 55% strongerthan 4340 35 spline axle shafts

Fusion Elite Kingpin 60 Front Axle Standard Features:

  • 72" width for ideal steering geometry and tire clearance when running 40" tires. Other width available or call for custom width.
  • High clearance center section with custom low profile fabricated differential cover
  • Genuine Made in the USA Spicer® 10.1" (256 mm) ring and pinion gear
  • 3.5" diameter x 7/16" wall axle tubes
  • Lifetime Warranty US Made Chromoly axle shafts with 1480 solid u-joints
  • Massive, race inspired Kingpin inner knuckle Cs and outer knuckles, no ball joints to wear out
  • Fully machined springless steering arm attached with 6 ARP Studs
  • Steering arm upgrades available for full hydro or virtually any application
  • 1/4" plate axle bracketry designed to be the strongest in its class
  • 8 x 6.5 bolt pattern
  • Massive 13.25" brake rotors and dual piston calipers
  • Yukon Hardcore locking hubs