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Nitro Pro Billet Ford 10", 3.812", Custom 3rd Member, Big 40 Spline Spool, 1350 Yoke (Choose Ratio)
Ford 9" Custom Billet Aluminum 3rd Member
9" Custom 3rd Member

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Price: $5,024.25

Product Code: REBF10BILLETPRO40

Choose 10" Gear Ratio*:


Nitro Pro Billet Ford 10" Aluminum 3rd Member
w/ Big 40 Spline Spool
Choose Ratio

Differential: Ford 9"
Gear Ratio: All 10"
Carriers: 40 spline
Manufacturer: Nitro Gear & Axle
Warranty: Nitro

3 quarts of Nitro Syntheic Plus Gear Lube

This is the ultimate 9" based 3rd member for competition on the market!

Great for hardcore custom vehicles with lots of power, big tires, and run hard.
King Of Hammer, Ultra 4 Baja, Pre-Runners, Trophy Trucks, Diesel Drag racing, Offroad Racing

Tech Note:
This Nitro Pro Billet Aluminum 3rd Member case is our exclusive 3.812" bore NPDOF9-BILLET-40.
Extremely strong, yet compact, based on the Ford 9"
Choice of Nitro 10" Gearset Ratio
Also available with an ARB RD249CE Competition Air Locker. REBF10BILLET-PRO40-ARB


Nitro 3.812" Billet 3rd Member Housing
Nitro 9310 Pro Ring & Pinion Gears
Nitro Big 40 Spline Spool
Nitro Master Install Kit
Nitro Forged 1350 Yoke

Professionally assembled and ready to install in your 9" axle housing.

Manufactured right here in the U.S. of A., these Nitro 3rd Members are CNC machined from aircraft grade 6061-T6 solid billet aluminum. High strength studs support the billet caps and adjuster nuts. These units feature a load bolt and use a billet 10 bolt Daytona style pinion support retained with high strength studs and hardware. Engineered for maximum stiffness and minimum defection these 3rd members are built in house to exacting specifications for extreme reliability, optimum street performance and stunning good looks. The Nitro Big 40 Spool does not require additives or additional maintenance after installation. Also available, ARB RD249CE Competition Air Locker application. " call 1-866-349-6801 for a quote.

Nitro Gear and Axle Premium Differential Ring and Pinion Gears, Axles and parts.

Nitro Gear & Axle strives to provide the highest quality differential & 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 Fits. At Nitro we know differentials, and know what it takes to provide you with high quality components.


This product can expose you to chemicals including toluene and benzene, which are known to the State of California to cause cancer and birth defects or other reproductive harm.
For more information go to: www.P65Warnings.ca.gov

  • State of the art CNC machined parts
  • Housing body cut from solid 6061 T6 billet aluminum
  • Main Caps cut from solid 7075 T6 billet aluminum.
  • High-strength load bolt to prevent deflection
  • Pre-drilled and tapped for ARB air locker-air line fitting and includes a plug if not using an ARB
  • Accepts Ford 9” or 10" Ring & Pinion sets, 28-35 spline pinion
  • Far stronger than other OE, Aftermarket Aluminum or Iron Dropout housings
  • 20-30% lighter than nodular iron drop-outs
  • Greater heat dissipation from aluminum vs. iron keeps your oil and gears cooler and lasting longer
  • Compact bearing main cap design allows fitment in any stock or aftermarket Ford 9" housing
  • Precision machined parts improve gear set-up pattern consistency
  • Made in the USA

80W-140 Nitro Para-Synthetic Plus Gear Oil, GL5 (1 Quart)
Price: $24.75
80W-140 Nitro Para-Synthetic Plus Gear Oil, GL5 (1 Quart)

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