ARB Air Locker AAM 11.5 differential on a white background
AAM 11.5 selectable air locker parts including wiring and connectors on a white background
ARB rear locker AAM 11.5 axle exploded diagramon a white background with text listing included items.
Collection of Heavy duty air locker AAM 11.5" parts including a metal flange, wiring harness, and connectors on a white background.
ARB locking differential AAM 11.5" on a white background
ARB Air Locker AAM 11.5 differential on a white background
AAM 11.5 selectable air locker parts including wiring and connectors on a white background
ARB rear locker AAM 11.5 axle exploded diagramon a white background with text listing included items.
Collection of Heavy duty air locker AAM 11.5" parts including a metal flange, wiring harness, and connectors on a white background.
ARB locking differential AAM 11.5" on a white background

ARB AAM 11.5" Selectable Air Locker - 30 Spline

ARBRD139

$1,299.95
/
Shipping calculated at checkout.

The ARB Selectable Air Locker for the AAM 11.5" rear axle features a heavy duty two-piece design. With minimal moving parts and a patented timed locking mechanism for ultra fast engagement, it locks both axle shafts together and ensuring maximum power transfer to the ground when conditions demand it.

When engaged, the internal differential gears are prevented from rotating independently, tying both wheels directly to the ring gear for unmatched traction. When disengaged, the differential functions as a conventional open unit while maintaining smooth handling, predictable steering, and reduced driveline wear.

Includes:

  • ARB AAM 11.5" Air Locker Differential
  • Dash mounted activation switch
  • Solenoid valve
  • Air line
  • Bulkhead fitting
    Note: Air compressor required for operation (sold separately).
Specifications
  • Axle Type: AAM 11.5"
  • Position: Rear
  • Shaft Diameter: 1.56"
  • Spline Count: 30-spline
  • Gear Ratio Compatibility: All ratios
  • Locker Type: Selectable Air Locker
  • Activation Method: Pneumatic (air-actuated)
  • Material: Steel
  • Color: Silver
Fitment
Make Model Year Range
Dodge Ram 2500 2003–2010
Dodge Ram 3500 2003–2010
Ram 2500 2011–2019
Ram 3500 2011–2019
Tech Insight

ARB’s patented timed locking mechanism provides exceptional strength while ensuring fast, positive unlocking. The steel reinforced, elastomer bonded annular seal is engineered to withstand extreme temperature swings and repeated duty cycles, making this locker ideal for vehicles that see both daily driving and aggressive off-road use. The two-piece construction minimizes internal components, maximizing reliability under heavy torque loads.

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