ARB Air Locker Dana 44 30 spline and components arranged on a white background
Dana 44 selectable air locker on a white background
Dana 44 rear air locker 3.73 with bearings and cables on a white background
Off-road Dana 44 ARB locker on a white background
Exploded view of Dana 44 traction locker upgrade including gears and bearings on a white background
Photo - Primary
ARB Air Locker Dana 44 30 spline and components arranged on a white background
Dana 44 selectable air locker on a white background
Dana 44 rear air locker 3.73 with bearings and cables on a white background
Off-road Dana 44 ARB locker on a white background
Exploded view of Dana 44 traction locker upgrade including gears and bearings on a white background
Photo - Primary

ARB Dana 44 Selectable Air Locker - 3.73 & Down, 30 Spline

ARBRD117

$1,299.95
/
Shipping calculated at checkout.

The ARB Air Locker Differential for Dana 44 axles is the world’s premier selectable traction aid, providing 100% locking traction on demand while maintaining smooth, predictable drivability when disengaged. Designed to allow drivers to move slower, safer, and with greater control while reducing drivetrain shock, vehicle damage, and environmental impact.

The Air Locker uses a pneumatically operated locking system inside the differential. When engaged, the internal gears are fully locked together, preventing independent axle shaft rotation and forcing both wheels to turn at the same speed. This delivers maximum traction in rocks, mud, snow, and uneven terrain. When disengaged, it functions like a conventional open differential.

Kit Includes:

  • ARB Dana 44 Air Locker Differential
  • Dash activation switch
  • Solenoid valve
  • Air line
  • Bulkhead fitting
  • Note: Air compressor required for operation (sold separately).
Specifications
  • Differential Type: Selectable Air Locker
  • Axle Type: Dana 44
  • Spline Count: 30
  • Shaft Diameter (Rear): 1.31 in
  • Material: Steel
  • Color: Silver
  • Design: Two-piece carrier
  • Activation: Pneumatic (air-operated)
Fitment
Make Model Year Range
Ford Bronco 1983–1996
Ford Bronco II 1984–1990
Ford E-100 Econoline 1983
Ford E-100 Econoline Club Wagon 1983
Ford E-150 / E-150 Econoline 1983–2014
Ford E-150 Club Wagon / Econoline Club Wagon 1983–2005
Ford E-250 / E-250 Econoline 1983–1998
Ford E-250 Econoline Club Wagon 1983–1991
Ford Expedition 1997–2001
Ford Explorer 1991–2014
Ford Explorer Sport 2001–2003
Ford Explorer Sport Trac 2001–2010
Ford Ranger 1990–2011
Mazda B4000 1994
Mazda Navajo 1991–1994

Important Fitment & Compatibility Notes:

  • Aftermarket Dana 44 standard-cut ring & pinion ratios of 4.56 & up require RD116 (Excludes Jeep JK)
  • Thick-cut Dana 44 ring & pinion sets (all ratios) require RD117 (Excludes Jeep JK)
  • Newer OEM Chrysler 8.25 and Dana 44 ring gears may use 3/8", 7/16", or 1/2" ring gear bolts
  • Air Locker flange holes must be drilled or reamed to accept 7/16" or 1/2" ring gear bolts
  • Always verify ring gear bolt size, cut type, and gear ratio before ordering.
Tech Insight

ARB’s patented timed locking mechanism enables ultra-fast disengagement under load, minimizing driveline stress while maintaining exceptional strength. The two-piece carrier design reduces internal moving parts for increased reliability, and the steel-reinforced, elastomer-bonded annular seal is engineered to perform in extreme temperatures and harsh off-road environments.

Selectable control means traction only when you need it—no compromise on-road, maximum confidence off-road.