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Ford 9" - 3.89 US Gear Ring & Pinion

Sku: F9-389-USG

Part Number: F9-389-USG
Brand: US Gear

For the selective car enthusiast, US Gear products have the right stuff to keep you going day after day and mile after mile! This is the highest quality aftermarket replacement available.

The superior quality of our gear Sets is the result of years of development, outstanding design, and state of the art manufacturing processes. US Gear performance products can be found anywhere a premium product is demanded.

We offer ring and pinion Sets in a wide range of ratios for many applications. The gear Sets are manufactured to the highest quality standards using state of the art CNC machining and gear cutting equipment, and are heat treated on-site in computer controlled furnaces.

When you buy US Gear product, you can expect:
  • High quality gears
  • Quiet operation
  • Consistent installation and Setup
  • Detailed instruction sheets
  • Durability & longevity

Features:

  • Fits Ford 9"
  • 9" ring gear diameter
  • 28 spline pinion
  • 10 ring gear bolts
1 year warranty against Manufacturer defects

Compatible with Differentials:

Ford 9" (9 inch) - 28 Spline
Ford 9" (9 inch) - 31 Spline
Ford 9" (9 inch) - 35 Spline

Compatible Vehicles:

  • Bronco: 1966 - 1986 (Rear)
  • Comet: 1964 - 1977 (Rear)
  • Continental: 1957 - 1979 (Rear)
  • Cougar: 1967 - 1979 (Rear)
  • E-100 1/2 Ton: 1968 - 1983 (Rear)
  • E-100 1/2 Ton: 1968 - 1983 (Rear)
  • E-150 1/2 Ton: 1979 - 1988 (Rear)
  • E200 3/4 Ton: 1968 - 1974 (Rear)
  • E-250 3/4 Ton: 1975 - 1980 (Rear)
  • F-100 1/2 Ton: 1957 - 1983 (Rear)
  • F-150 1/2 Ton: 1968 - 1987 (Rear)
  • Fairlane: 1957 - 1971 (Rear)
  • Falcon: 1960 - 1970 (Rear)
  • Galaxie: 1959 - 1974 (Rear)
  • Granada: 1975 - 1979 (Rear)
  • Grand Marquis: 1975 - 1980 (Rear)
  • LTD: 1965 - 1979 (Rear)
  • Mark III: 1968 - 1971 (Rear)
  • Maverick: 1970 - 1978 (Rear)
  • Mustang: 1965 - 1973 (Rear)
  • Ranchero: 1957 - 1979 (Rear)
  • Thunderbird: 1955 - 1979 (Rear)
  • Torino / Grand Torino: 1968 - 1976 (Rear)

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

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