ARB RD139 Air Locker Rear for 2001-2019 Chevy/GMC & Dodge Ram 3/4-Ton AAM 11.5"

Regular price: $1,299.95
Regular price: ~~$1,299.95~~
Sale price: $1,299.95

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In Stock: 10

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Product Specification:

SKU:ARBRD139

MPN: RD139

UPC: 881348011909

Weight: 56.6 lb

Inventory: 10

Type: Differentials

Vehicle Fitment

2001-2015 Chevrolet Silverado/Sierra 2500/3500 (all trims, 4WD, 5.3L-6.6L, AAM 11.5" 30-spline)
2003-2019 Dodge Ram 2500/3500 (all trims, 4WD, 5.7L-6.7L, AAM 11.5" 30-spline)
2007-2018 Jeep Wrangler JK Rubicon (3.6L/3.8L V6, Dana 44 rear, 35-spline)

Features

Selectable air-actuated locker for on-demand 100% traction
Maintains open diff for smooth drivability when unlocked
Precision-forged steel gears for high torque capacity
Two-piece nodular iron housing for dimensional strength
Rebuilding possible with ARB service kits
Fully sealed to resist water, dirt, and air leaks
Fast timed unlocking ensures smooth re-engagement
Includes switch, solenoid, air line, bulkhead fitting

Specifications

Position: Rear Differential
Axle Type: AAM 11.5" (GM/Dodge) - Dana 44 (Jeep JK)
Spline Count: 30 (AAM) / 35 (Dana 44)
Activation: Pneumatic via ARB compressor (sold separately)
Material: Forged alloy gears; nodular iron housing
Air Fitting: 1/8" BSP; includes tubing and fittings
Drivetrain: 4WD only

Included Components

1x ARB RD139 Air Locker Differential
1x Activation Switch
1x Solenoid Valve
1x Bulkhead Fitting Kit
1x Air Line Tubing
1x Installation Hardware Kit
1x Installation Guide / User Manual

Product Description

The ARB RD139 Air Locker is a dual-purpose selectable locking differential designed for both heavy-duty trucks (2001-2019 Chevy/GMC Silverado/Sierra and Dodge Ram ¾-ton trucks with AAM 11.5" 30-spline axles) and extreme off-road Jeeps (2007-2018 JK Rubicon). It installs into the rear differential, enabling 100% torque to both wheels via compressed air, while maintaining open-diff characteristics for normal driving.

Constructed with forged steel internals and a rugged two-piece nodular iron housing, the RD139 handles heavy hauling, towing, rock crawling, and off-road adventure. The selectable design gives drivers full control over traction engagement. An ARB onboard compressor (sold separately) is required. Installation requires differential cover removal and bulkhead port drilling - best handled by professionals familiar with ARB procedures.