Photo - Primary ARB RD245 Air Locker Dana M220
Collection of Jeep JL M220 air locker upgrade including a wheel hub, springs, and wiring on a white background
Dana M210 selectable locker differential on a white background
Off-road 32 spline ARB air locker differential on a white background

ARB Dana M220 Selectable Air Locker - 32 Spline

ARBRD245

Regular price$1,299.95
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Shipping calculated at checkout.

The ARB RD245 Air Locker Differential is designed for Jeep JL Sport & Sahara models equipped with M220 axles, and allows instant activation at any speed, giving you maximum control when terrain conditions demand it.

Unlike automatic lockers, the ARB Air Locker operates pneumatically. When engaged, it fully locks the differential, preventing internal gears from rotating independently and forcing both axle shafts to turn together. This ensures maximum traction across rocks, mud, sand, and steep climbs. When switched off, it reverts to a conventional open differential for smooth, predictable on-road driving.

Kit Includes:

  • ARB Dana M220 Air Locker Differential
  • Dash activation switch
  • Solenoid valve
  • Air line
  • Bulkhead fitting

Note: Air compressor required for operation (sold separately).


Specifications
  • Brand: ARB
  • Part Number: RD245
  • Differential Type: Selectable Air Locker
  • Material: Steel
  • Color: Silver
  • Spline Count: 32
  • Shaft Diameter: 1.41 in
  • Gear Ratio Compatibility: All ratios
  • Activation: Pneumatic (air-operated)

Fitment
Make Model Year Range
Dodge Ram 2500 1996–2003
Dodge Ram 3500 1998–2003
Ford E-150 2003–2014
Ford E-350 Club Wagon 1997–2005
Ford E-350 Econoline 1997–2008
Ford E-350 Super Duty 1999–2008
Ford F-250 1996–1999
Ford F-250 HD 1997
Ford F-250 Super Duty 1999–2022
Ford F-350 1996–1997
Ford F-350 Super Duty 1999–2022

 

Vehicle Compatibility Notes:

  • ⚠ Compatible with Jeep JL Sport & Sahara models equipped with M220 (rear) or M210 (front)
  • ⚠ Not compatible with JL Rubicon
  • ⚠ OE locker replacement requires aftermarket axle shafts or shafts from a non-OE-locker-equipped vehicle

Tech Insight

ARB’s patented timed locking mechanism delivers ultra-fast disengagement under load, reducing driveline stress while maintaining strength. The two-piece carrier design minimizes internal moving parts, increasing reliability under extreme torque and shock loads. A steel-reinforced, elastomer-bonded annular seal ensures consistent performance across extreme temperatures—from desert heat to arctic cold.

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



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