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ARB Air Locker AAM 11.5" 30 Spline Axles (RD139)

RRP: $1,183.00
$997.50 (You save $185.50)

 Product Description


ARB Air Locker AAM 11.5" 30 Spline Axles (RD139)


The ARB Air Locker AAM 11.5" 30 Spline is designed to fit these vehicles:

  • GM 2500/3500 2000-06
  • Dodge Ram 2500/3500 2003-09


This air locker kit includes 1 replacement differential, 1 activation switch, 1 solenoid valve, 1 air line and bulkhead fittings.


  • Provides 100% traction on demand without affecting on road drivability or driveline wear
  • Vastly improved traction means less reliance on momentum, which reduces the likelihood of vehicle damage and environmental impact
  • Easy, convenient operation allows the user to concentrate on the terrain without leaving the comfort and safety of the driver’s seat
  • Ultra durable and extremely strong - only the highest quality materials used in construction
  • Incredibly simple yet effective design that employs minimal moving parts, thereby ensuring maximum reliability
  • Thoroughly tested and proven design – trusted and used in over 80 countries around the world
  • Front and rear Air Lockers available for most makes and models
  • 4WD & 2WD applications
  • Easy installation and maintenance – no special tools, skills or additives required

Also required for operation of this part:


These parts are required for installing this product on your vehicle.


  • ALSB2 - bracket for moutning two (2) rocker switches. Manufactured from steel and powder-coated black
  • ALSB3 - bracket for mounting three (3) rocker switches. Manufactured from steel and powder-coated black


 Exploded View Of Air Locker


1. Diff Case: Fully machined 1 piece nodular iron diff carrier case offers the rigidity of a 1 piece diff but twice the number of pinion gears to handle the torque.

2. Flange Cap Assembly: Fully machined nodular iron flange cap incorporates the stationary side of ARB’s proven and patented timed locking mechanism.

3. Splined Side Gear: The most "lockable" gear in the industry due to High grade nickel alloy steel, aerospace grade surface treatments, and ARB’s patented timed locking system.

4. Pinion Gear: Gear tooth geometry to yield structural advantages of up to 30% over commercially available high strength gears.

5. Clutch Gear: ARB’s patented locking system actually supports the side gear teeth, giving you more torque handling exactly when you need it.

6. Spider Block: A billet machined alloy steel spider block supports the cross shafts, using the torque applied at each shaft to support the next shaft along.

7. Long Cross Shaft: Alloy steels and performance technology make for a high pressure running fit that can handle huge work loads.

8. Cross Shaft Retaining Pin: Custom made one piece hardened retaining pins lock into the assembly using a tapered thread junction.

9. Bonded Seal: Steel reinforced, elastomer bonded annular seal has been proven to handle 20,000+ cycles under the most extreme climactic temperatures.

10. Return Springs: ARB Air Lockers use between 4 and 12 return springs to support the entire profile of the locking gear for a fast, positive, and independent disengagement when the air is exhausted.

11. Air Supply: At the flick of a dash mounted switch, compressed air is delivered to a seal housing assembly via a nylon air line.

12. Solenoid Valve:  Manufactured from a machined and anodized billet, sealed against moisture and dust to IP54, ARB’s heavy duty solenoid controls the air actuation. A low watt coil ensures extra long life and protection against hot environments. Please note - some technical features may differ between models.

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57.00 LBS
Usually ships within 1-2 business days
Calculated at checkout



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