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Dana 44 JK OX Locker - 30 Spline (Rubicon)

Sku: OX D44-JKR-30

Part Number: OX D44-JKR-30
Brand: OX Locker

The Dana 44 OX Locker for Jeep Wrangler JK Rubicons is a selectable lockers MADE IN USA that offers superior reliability and performance. OX Lockers offer a variety of activation control mechanisms, including 100% mechanical, air, or electric shifting systems. The locking differential is the same regardless of your choice of shift system, allowing an easy switch from one shift system to another. All lockers and shift systems are compatible with a failsafe mechanical backup locking device.


OX Lockers keep you moving in all conditions and allow you to tackle the toughest off-road terrain.

Fits:2007-2018 Jeep Wrangler JK/JKU RUBICON

Includes ox differential cover. Cable and shifters are additional options.

Model:OX D44-JKR-30

Application Axle Shafts Gear Ratio Tech Notes
Dana 44 JK Rubicon

30 Spline All
  • Required: JK Rubicon Ring & Pinion
  • Includes heavy duty cover
  • Requires: cable or air actuator, purchased separately
  • Drilled for 1/2” ring gear bolts

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