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Fusion Pro High Pinion 10" 3rd Member - 3.25" Load Bolt Case - 35 Spline


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Part Number: FUS-HP10-ASMB
Brand: Fusion

Fusion Pro High Pinion 9" or 10" 3rd Member - 3.25" Load Bolt Case. Whether you are racing or demand the best, the Fusion Pro line of 3rd members is the answer. Fusion 4x4 customers demand the best parts, so we went to the best to get them. All of our Pro 3rd members use cases from GEARWORKS. If you're not familiar with GEARWORKS, just take a look under some of the winners of King of the Hammers as well as some the top trophy trucks in the country.

This high pinion iron case uses 3.25" carrier bearings, while the rest of the case uses the same design features as their monster 4" trophy truck case.Features of the 3.25" case:

  • Standard 35 Spline Pinion Support
  • Load Bolt to prevent ring gear deflection (the most common cause of gear failure under load)
  • Longer pinion pocket bearing for additional pinion support with a bearing retainer plate secured with three countersunk socket head cap screws
  • Main bearing caps and spanner nuts are made from chromoly steel and are held tight by massive 9/16″ ARP studs and harware
  • CNC machined to clear a ring gear with a true outer diameter of 9.500”
  • Uses 7/16″ pinion support bolts and a taller pocket bearing with more load capacity than a standard 9″ bearing


  • GEARWORKS Heavy Duty Nodular Iron Load Bolt Case with 3.25" Bearing Journals
  • GEARWORKS Billet Aluminum 35 Spline Pinion Support with an integrated lubrication channel
  • 1350 Chromoly Yoke
  • 35 Spline Locker or Spool Options
  • 9310 10" PRO Gears with 35 Spline Pinion
  • 12 Point Alloy Pinion Support Bolts

Lead time is approximately 3 weeks.

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