ARB Air Locker 11.5-Inch 30-Spline AAM Differential — Fits 2001-2006 Chevrolet GMC Dodge 2500/3500

SKU: ARBRD139
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About ARB ARB 4x4 Accessories is Australia's premier overland and ...Read More

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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

Product Details

Product Description
Part Numbers
Sizing & Fit

About ARB

ARB 4x4 Accessories is Australia's premier overland and 4x4 brand. From the legendary Air Locker selectable differentials to compressors, fridge-freezers, and recovery gear, ARB equips Toyota Land Cruisers, 4Runners, and Tacomas on every continent.

Watch in action

Heavy-Duty Traction for 11.5-Inch AAM Axles

When you are driving a heavy-duty truck, you need a differential that can handle the massive torque and demanding conditions of towing, hauling, or off-roading. The ARB Air Locker for the 11.5-inch AAM axle is designed to provide 100% selectable traction for 2001-2006 Chevrolet, GMC, and Dodge 2500/3500 models. This unit replaces your factory differential, giving you the ability to lock both rear wheels together instantly for superior grip in mud, snow, or loose dirt.

Why Upgrade to an ARB Air Locker?

  • Selectable Performance: Engage the locker only when you need it, maintaining normal driving characteristics on the highway.
  • Unmatched Strength: Engineered specifically for the high-torque demands of 3/4 and 1-ton trucks.
  • Pneumatic Reliability: The proven air-actuated design is simple, durable, and highly effective in extreme environments.
  • Enhanced Control: Prevents the loss of traction common in open differentials, ensuring you stay moving when it counts.

The advantage of the Air Locker lies in its ability to prevent internal differential gear rotation, forcing your axle shafts to turn in unison. This ensures that even if one wheel is off the ground or on a slick surface, the other wheel continues to receive power. When you reach solid ground, simply flip the switch to disengage the locker and enjoy the smooth, quiet operation of an open differential. Trust the experts at GGCRACING to provide the high-performance drivetrain components your heavy-duty truck deserves.

Vehicle Fitment

Years Make Model Trim
2001-2004 Chevrolet Silverado 2500 Base
2001-2004 Chevrolet Silverado 2500 LS
2001-2004 Chevrolet Silverado 2500 LT
2004 Chevrolet Silverado 2500 WT
2001-2005 Chevrolet Silverado 2500 HD Base
2001-2006 Chevrolet Silverado 2500 HD LS
2001-2009 Chevrolet Silverado 2500 HD LT
2003-2009 Chevrolet Silverado 2500 HD WT
2007-2009 Chevrolet Silverado 2500 HD LTZ
2007 Chevrolet Silverado 2500 HD Classic LS
2007 Chevrolet Silverado 2500 HD Classic LT
2007 Chevrolet Silverado 2500 HD Classic WT
2006 Chevrolet Silverado 3500 LS
2006 Chevrolet Silverado 3500 LT
2006 Chevrolet Silverado 3500 WT
2007 Chevrolet Silverado 3500 Classic LS
2007 Chevrolet Silverado 3500 Classic LT
2007 Chevrolet Silverado 3500 Classic WT
2007-2009 Chevrolet Silverado 3500 HD LT
2007-2009 Chevrolet Silverado 3500 HD LTZ
2007-2009 Chevrolet Silverado 3500 HD WT
2003 Dodge Ram 2500 Laramie
2003-2010 Dodge Ram 2500 SLT
2003-2010 Dodge Ram 2500 ST
2005-2010 Dodge Ram 2500 Laramie
2006-2007 Dodge Ram 2500 Sport
2006-2007 Dodge Ram 2500 TRX4
2006-2010 Dodge Ram 2500 Power Wagon
2008-2010 Dodge Ram 2500 SXT
2010 Dodge Ram 2500 TRX
2003-2010 Dodge Ram 3500 SLT
2003-2010 Dodge Ram 3500 ST
2003-2010 Dodge Ram 3500 Laramie
2006-2007 Dodge Ram 3500 Sport
2007 Dodge Ram 3500 TRX4
2008-2009 Dodge Ram 3500 SXT
2001-2002 GMC Sierra 2500 SL
2001-2004 GMC Sierra 2500 SLT
2001-2004 GMC Sierra 2500 SLE
2002-2004 GMC Sierra 2500 Base
2003-2004 GMC Sierra 2500 WT
2001-2002 GMC Sierra 2500 HD SL
2001-2007 GMC Sierra 2500 HD SLE
2001-2007 GMC Sierra 2500 HD SLT
2002-2005 GMC Sierra 2500 HD Base
2003-2007 GMC Sierra 2500 HD WT
2006 GMC Sierra 2500 HD SL
2007 GMC Sierra 2500 HD Classic SL
2007 GMC Sierra 2500 HD Classic SLE
2007 GMC Sierra 2500 HD Classic SLT
2007 GMC Sierra 2500 HD Classic WT
2006 GMC Sierra 3500 SL
2006 GMC Sierra 3500 SLE
2006 GMC Sierra 3500 SLT
2006 GMC Sierra 3500 WT
2007 GMC Sierra 3500 Classic SL
2007 GMC Sierra 3500 Classic SLE
2007 GMC Sierra 3500 Classic SLT
2007 GMC Sierra 3500 Classic WT
2007 GMC Sierra 3500 HD SLE

…and 25 additional fitments. Contact us to confirm yours.

Product Details

Product Description
Part Numbers
Sizing & Fit

About ARB

ARB 4x4 Accessories is Australia's premier overland and 4x4 brand. From the legendary Air Locker selectable differentials to compressors, fridge-freezers, and recovery gear, ARB equips Toyota Land Cruisers, 4Runners, and Tacomas on every continent.

Watch in action

Heavy-Duty Traction for 11.5-Inch AAM Axles

When you are driving a heavy-duty truck, you need a differential that can handle the massive torque and demanding conditions of towing, hauling, or off-roading. The ARB Air Locker for the 11.5-inch AAM axle is designed to provide 100% selectable traction for 2001-2006 Chevrolet, GMC, and Dodge 2500/3500 models. This unit replaces your factory differential, giving you the ability to lock both rear wheels together instantly for superior grip in mud, snow, or loose dirt.

Why Upgrade to an ARB Air Locker?

  • Selectable Performance: Engage the locker only when you need it, maintaining normal driving characteristics on the highway.
  • Unmatched Strength: Engineered specifically for the high-torque demands of 3/4 and 1-ton trucks.
  • Pneumatic Reliability: The proven air-actuated design is simple, durable, and highly effective in extreme environments.
  • Enhanced Control: Prevents the loss of traction common in open differentials, ensuring you stay moving when it counts.

The advantage of the Air Locker lies in its ability to prevent internal differential gear rotation, forcing your axle shafts to turn in unison. This ensures that even if one wheel is off the ground or on a slick surface, the other wheel continues to receive power. When you reach solid ground, simply flip the switch to disengage the locker and enjoy the smooth, quiet operation of an open differential. Trust the experts at GGCRACING to provide the high-performance drivetrain components your heavy-duty truck deserves.

Vehicle Fitment

Years Make Model Trim
2001-2004 Chevrolet Silverado 2500 Base
2001-2004 Chevrolet Silverado 2500 LS
2001-2004 Chevrolet Silverado 2500 LT
2004 Chevrolet Silverado 2500 WT
2001-2005 Chevrolet Silverado 2500 HD Base
2001-2006 Chevrolet Silverado 2500 HD LS
2001-2009 Chevrolet Silverado 2500 HD LT
2003-2009 Chevrolet Silverado 2500 HD WT
2007-2009 Chevrolet Silverado 2500 HD LTZ
2007 Chevrolet Silverado 2500 HD Classic LS
2007 Chevrolet Silverado 2500 HD Classic LT
2007 Chevrolet Silverado 2500 HD Classic WT
2006 Chevrolet Silverado 3500 LS
2006 Chevrolet Silverado 3500 LT
2006 Chevrolet Silverado 3500 WT
2007 Chevrolet Silverado 3500 Classic LS
2007 Chevrolet Silverado 3500 Classic LT
2007 Chevrolet Silverado 3500 Classic WT
2007-2009 Chevrolet Silverado 3500 HD LT
2007-2009 Chevrolet Silverado 3500 HD LTZ
2007-2009 Chevrolet Silverado 3500 HD WT
2003 Dodge Ram 2500 Laramie
2003-2010 Dodge Ram 2500 SLT
2003-2010 Dodge Ram 2500 ST
2005-2010 Dodge Ram 2500 Laramie
2006-2007 Dodge Ram 2500 Sport
2006-2007 Dodge Ram 2500 TRX4
2006-2010 Dodge Ram 2500 Power Wagon
2008-2010 Dodge Ram 2500 SXT
2010 Dodge Ram 2500 TRX
2003-2010 Dodge Ram 3500 SLT
2003-2010 Dodge Ram 3500 ST
2003-2010 Dodge Ram 3500 Laramie
2006-2007 Dodge Ram 3500 Sport
2007 Dodge Ram 3500 TRX4
2008-2009 Dodge Ram 3500 SXT
2001-2002 GMC Sierra 2500 SL
2001-2004 GMC Sierra 2500 SLT
2001-2004 GMC Sierra 2500 SLE
2002-2004 GMC Sierra 2500 Base
2003-2004 GMC Sierra 2500 WT
2001-2002 GMC Sierra 2500 HD SL
2001-2007 GMC Sierra 2500 HD SLE
2001-2007 GMC Sierra 2500 HD SLT
2002-2005 GMC Sierra 2500 HD Base
2003-2007 GMC Sierra 2500 HD WT
2006 GMC Sierra 2500 HD SL
2007 GMC Sierra 2500 HD Classic SL
2007 GMC Sierra 2500 HD Classic SLE
2007 GMC Sierra 2500 HD Classic SLT
2007 GMC Sierra 2500 HD Classic WT
2006 GMC Sierra 3500 SL
2006 GMC Sierra 3500 SLE
2006 GMC Sierra 3500 SLT
2006 GMC Sierra 3500 WT
2007 GMC Sierra 3500 Classic SL
2007 GMC Sierra 3500 Classic SLE
2007 GMC Sierra 3500 Classic SLT
2007 GMC Sierra 3500 Classic WT
2007 GMC Sierra 3500 HD SLE

…and 25 additional fitments. Contact us to confirm yours.

Product Details

Product Description

About ARB

ARB 4x4 Accessories is Australia's premier overland and 4x4 brand. From the legendary Air Locker selectable differentials to compressors, fridge-freezers, and recovery gear, ARB equips Toyota Land Cruisers, 4Runners, and Tacomas on every continent.

Watch in action

Heavy-Duty Traction for 11.5-Inch AAM Axles

When you are driving a heavy-duty truck, you need a differential that can handle the massive torque and demanding conditions of towing, hauling, or off-roading. The ARB Air Locker for the 11.5-inch AAM axle is designed to provide 100% selectable traction for 2001-2006 Chevrolet, GMC, and Dodge 2500/3500 models. This unit replaces your factory differential, giving you the ability to lock both rear wheels together instantly for superior grip in mud, snow, or loose dirt.

Why Upgrade to an ARB Air Locker?

  • Selectable Performance: Engage the locker only when you need it, maintaining normal driving characteristics on the highway.
  • Unmatched Strength: Engineered specifically for the high-torque demands of 3/4 and 1-ton trucks.
  • Pneumatic Reliability: The proven air-actuated design is simple, durable, and highly effective in extreme environments.
  • Enhanced Control: Prevents the loss of traction common in open differentials, ensuring you stay moving when it counts.

The advantage of the Air Locker lies in its ability to prevent internal differential gear rotation, forcing your axle shafts to turn in unison. This ensures that even if one wheel is off the ground or on a slick surface, the other wheel continues to receive power. When you reach solid ground, simply flip the switch to disengage the locker and enjoy the smooth, quiet operation of an open differential. Trust the experts at GGCRACING to provide the high-performance drivetrain components your heavy-duty truck deserves.

Vehicle Fitment

Years Make Model Trim
2001-2004 Chevrolet Silverado 2500 Base
2001-2004 Chevrolet Silverado 2500 LS
2001-2004 Chevrolet Silverado 2500 LT
2004 Chevrolet Silverado 2500 WT
2001-2005 Chevrolet Silverado 2500 HD Base
2001-2006 Chevrolet Silverado 2500 HD LS
2001-2009 Chevrolet Silverado 2500 HD LT
2003-2009 Chevrolet Silverado 2500 HD WT
2007-2009 Chevrolet Silverado 2500 HD LTZ
2007 Chevrolet Silverado 2500 HD Classic LS
2007 Chevrolet Silverado 2500 HD Classic LT
2007 Chevrolet Silverado 2500 HD Classic WT
2006 Chevrolet Silverado 3500 LS
2006 Chevrolet Silverado 3500 LT
2006 Chevrolet Silverado 3500 WT
2007 Chevrolet Silverado 3500 Classic LS
2007 Chevrolet Silverado 3500 Classic LT
2007 Chevrolet Silverado 3500 Classic WT
2007-2009 Chevrolet Silverado 3500 HD LT
2007-2009 Chevrolet Silverado 3500 HD LTZ
2007-2009 Chevrolet Silverado 3500 HD WT
2003 Dodge Ram 2500 Laramie
2003-2010 Dodge Ram 2500 SLT
2003-2010 Dodge Ram 2500 ST
2005-2010 Dodge Ram 2500 Laramie
2006-2007 Dodge Ram 2500 Sport
2006-2007 Dodge Ram 2500 TRX4
2006-2010 Dodge Ram 2500 Power Wagon
2008-2010 Dodge Ram 2500 SXT
2010 Dodge Ram 2500 TRX
2003-2010 Dodge Ram 3500 SLT
2003-2010 Dodge Ram 3500 ST
2003-2010 Dodge Ram 3500 Laramie
2006-2007 Dodge Ram 3500 Sport
2007 Dodge Ram 3500 TRX4
2008-2009 Dodge Ram 3500 SXT
2001-2002 GMC Sierra 2500 SL
2001-2004 GMC Sierra 2500 SLT
2001-2004 GMC Sierra 2500 SLE
2002-2004 GMC Sierra 2500 Base
2003-2004 GMC Sierra 2500 WT
2001-2002 GMC Sierra 2500 HD SL
2001-2007 GMC Sierra 2500 HD SLE
2001-2007 GMC Sierra 2500 HD SLT
2002-2005 GMC Sierra 2500 HD Base
2003-2007 GMC Sierra 2500 HD WT
2006 GMC Sierra 2500 HD SL
2007 GMC Sierra 2500 HD Classic SL
2007 GMC Sierra 2500 HD Classic SLE
2007 GMC Sierra 2500 HD Classic SLT
2007 GMC Sierra 2500 HD Classic WT
2006 GMC Sierra 3500 SL
2006 GMC Sierra 3500 SLE
2006 GMC Sierra 3500 SLT
2006 GMC Sierra 3500 WT
2007 GMC Sierra 3500 Classic SL
2007 GMC Sierra 3500 Classic SLE
2007 GMC Sierra 3500 Classic SLT
2007 GMC Sierra 3500 Classic WT
2007 GMC Sierra 3500 HD SLE

…and 25 additional fitments. Contact us to confirm yours.

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