ARB Airlocker Differential

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

RD173

Overview:

The ARB Airlocker is the world’s premier traction aid designed to keep your vehicle moving confidently in all conditions. Engineered for Dodge B300 Vans, Ram 2500 and 3500 trucks, and B3500 models, this high-speed 35 spline Airlocker for Dana 70/80 axles delivers instant, on-demand locking capability with the flick of a switch. Whether you’re tackling rugged off-road terrain or navigating slippery surfaces, the Airlocker ensures both wheels turn in unison, providing maximum traction and control.

Ideal for off-road enthusiasts, commercial users, and anyone requiring superior traction, the ARB Airlocker enhances vehicle capability without compromising on-road drivability. Its pneumatic operation allows activation at any speed, enabling safer, more controlled driving in challenging environments.

Key Features:

Designed for durability and ease of use, the ARB Airlocker offers a range of advanced features:

• Instant pneumatic locking system activated via a simple dashboard switch
• High-speed engagement allows activation at any vehicle speed
• Steel reinforced, elastomer bonded annular seal withstands extreme temperatures
• Two-piece design with minimal moving parts for maximum reliability
• Patented timed locking mechanism ensures high strength and ultra-fast unlocking
• Provides 100% traction on demand without affecting driveline wear or on-road handling
• Compatible with Dana 70 and Dana 80 axles featuring 35 spline shafts
• Includes all necessary components for installation: activation switch, solenoid valve, air line, and bulkhead fitting

Construction & Design:

The ARB Airlocker is engineered with robust materials to withstand the harshest off-road conditions. Its two-piece design reduces complexity and enhances durability, while the steel reinforced, elastomer bonded annular seal ensures reliable operation across extreme climatic temperatures. The internal pneumatic locking mechanism prevents the differential gears from rotating independently, effectively locking both axle shafts together for maximum traction.

Minimal moving parts within the Airlocker reduce the risk of mechanical failure, ensuring long-lasting performance and peace of mind during demanding use.

Installation & Fitment:

Installation of the ARB Airlocker requires a compatible air compressor system (sold separately) to operate the pneumatic locking mechanism. The kit is designed for direct fitment on Dana 70 and Dana 80 axles with 35 spline shafts, specifically tailored for Dodge B300 Vans (1971–1974), Dodge B300 (1975–1980), Dodge Ram 2500 (1994–2003), Dodge Ram 3500 (1994–2003), and Dodge B3500 (1995–1998) models.

Professional installation is recommended to ensure proper integration with your vehicle’s drivetrain and air system. Once installed, the Airlocker can be engaged or disengaged from the driver’s seat, allowing you to maintain focus on the terrain ahead.

What's Included:

• ARB Airlocker differential assembly
• Activation switch for dashboard mounting
• Solenoid valve for pneumatic control
• Air line tubing
• Bulkhead fitting for secure air line routing

Ideal For:

The ARB Airlocker is perfect for off-road enthusiasts, commercial operators, and anyone who demands superior traction from their Dodge B300 or Ram trucks. Whether you’re navigating rocky trails, muddy paths, or snow-covered roads, this differential upgrade provides enhanced control, reduces wheel slip, and helps prevent vehicle damage by enabling safer, more confident driving in challenging conditions.

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.