ARB Air Locker Differential

1971–1980 Dodge B300 Van / 1994–2003 Dodge Ram 2500 / 1994–2003 Dodge Ram 3500 / 1995–1998 Dodge B3500

RD172

Overview:

The ARB Air Locker is the world’s premier traction aid designed to deliver maximum off-road capability and control. Engineered for Dodge B300 Vans, Ram 2500 and 3500 trucks, and B3500 models within the specified years, this low-speed Dana 70/80 differential upgrade provides instant, on-demand locking of the axle shafts. With a simple switch inside the cab, the Air Locker engages pneumatically, locking both wheels together to ensure maximum traction in challenging terrain.

Ideal for off-road enthusiasts, commercial users, and anyone requiring superior traction in adverse conditions, the ARB Air Locker enhances vehicle capability without compromising on-road drivability. When disengaged, it functions as a conventional open differential, maintaining smooth handling and reducing driveline wear.

Key Features:

Designed for reliability and ease of use, the ARB Air Locker offers a range of advanced features:

• Instant pneumatic locking system activated by a simple in-cab switch
• Operates at any vehicle speed, allowing safe engagement on the move
• Steel reinforced, elastomer bonded annular seal for extreme temperature resistance
• Two-piece ultra-durable design with minimal moving parts for maximum reliability
• Patented timed locking mechanism ensures high strength and rapid unlocking
• Provides 100% traction on demand without affecting normal driving behavior
• Compatible with Dana 70 and Dana 80 axles featuring 35 spline shafts
• Reduces vehicle damage and environmental impact by enabling controlled, slower driving

Construction & Design:

The ARB Air Locker is engineered with robust materials and precision manufacturing to withstand the harshest off-road environments. Its two-piece construction minimizes complexity and potential failure points, while the steel reinforced annular seal is bonded with elastomer to maintain airtight integrity under extreme climatic conditions. This design ensures long-lasting performance and dependable operation, even in the most demanding applications.

The internal locking mechanism uses pneumatic pressure to engage the differential gears, preventing independent wheel rotation and delivering maximum traction. The system’s minimal moving parts reduce maintenance requirements and enhance durability.

Installation & Fitment:

Installation of the ARB Air Locker requires compatibility with Dana 70 or Dana 80 axles equipped with 35 spline shafts. The kit is designed for direct fitment on Dodge B300 Vans (1971–1980), Dodge Ram 2500 and 3500 trucks (1994–2003), and Dodge B3500 models (1995–1998). Professional installation is recommended to ensure proper setup of the pneumatic system, including the activation switch, solenoid valve, air line, and bulkhead fitting.

An air compressor is required for operation but is sold separately. Once installed, the Air Locker allows seamless switching between locked and unlocked modes from the driver’s seat, enhancing safety and convenience.

What's Included:

• ARB Air Locker differential assembly
• Activation switch for in-cab control
• Solenoid valve for pneumatic engagement
• Air line and bulkhead fitting for air supply connection

Ideal For:

This Air Locker is perfect for drivers who demand superior traction and control in off-road, work, or adverse weather conditions. Whether navigating rocky trails, muddy terrain, or slippery surfaces, it provides confidence and capability for Dodge B300 Vans and Ram heavy-duty trucks. It is especially suited for commercial users, off-road enthusiasts, and anyone requiring reliable, on-demand traction without sacrificing everyday drivability.

ARB is a globally recognized off-road and overlanding brand that builds hard-use equipment for trucks, SUVs, and adventure rigs. From bumpers, roof racks, and protection gear to its well-known Old Man Emu suspension systems, ARB focuses on durability, fitment, and real-world trail performance for drivers who push beyond pavement.