ARB Airlocker Differential

2003–2019 Dodge Ram 2500 / 2003–2019 Dodge Ram 3500

RD139

Overview:

The ARB Airlocker is the world’s premier traction aid designed to provide maximum grip and control in challenging off-road conditions. Engineered specifically for Dodge Ram 2500 and 3500 models from 2003 to 2019, this pneumatically operated locking differential allows drivers to instantly lock the axle shafts together with the flick of a switch. This ensures both wheels turn at the same speed, delivering 100% traction when you need it most.

Ideal for off-road enthusiasts, work trucks, and anyone who demands reliable traction in mud, snow, rocks, or uneven terrain, the Airlocker enhances vehicle capability without compromising on-road drivability. When disengaged, it functions as a standard open differential, maintaining smooth handling and reducing driveline wear.

Key Features:

The ARB Airlocker combines innovative technology with rugged construction to deliver dependable performance in the toughest environments. Key features include:

• Instant pneumatic locking mechanism activated via a simple dashboard switch
• Operates at any speed, allowing safe engagement on the move
• Steel reinforced, elastomer bonded annular seal designed for extreme temperatures
• Two-piece ultra-durable design with minimal moving parts for maximum reliability
• Patented timed locking system for high strength and rapid unlocking
• Provides 100% traction on demand without affecting normal driving behavior
• Includes activation switch, solenoid valve, air line, and bulkhead fitting for complete installation
• Compatible with 30 spline axle shafts and all gear ratios

Construction & Design:

Built to withstand the rigors of off-road use, the ARB Airlocker features a robust two-piece construction that minimizes moving parts, reducing the risk of failure. The steel reinforced annular seal is bonded with elastomer to endure extreme climatic conditions, from freezing cold to intense heat. This durable design ensures long-lasting performance and reliability under heavy loads and harsh environments.

The internal locking mechanism is pneumatically operated, allowing smooth and immediate engagement without the need for manual intervention or complex mechanical linkages. This design not only improves durability but also simplifies maintenance and installation.

Installation & Fitment:

The ARB Airlocker is a direct fit for Dodge Ram 2500 and 3500 models from 2003 through 2019, compatible with 30 spline axle shafts. Installation requires an air compressor system (sold separately) to operate the pneumatic locking mechanism. The kit includes all necessary components such as the activation switch, solenoid valve, air line, and bulkhead fitting, enabling a straightforward installation process.

Professional installation is recommended to ensure proper setup and integration with the vehicle’s existing differential housing and air supply system. Once installed, the Airlocker can be activated from the driver’s seat, allowing you to maintain focus on the terrain ahead.

What's Included:

• ARB Airlocker differential unit
• Activation switch for dashboard mounting
• Solenoid valve for pneumatic control
• Air line tubing
• Bulkhead fitting for air line connection

Ideal For:

This Airlocker differential is perfect for off-road enthusiasts, professional drivers, and anyone who requires enhanced traction in challenging conditions. Whether you’re navigating rocky trails, deep mud, snow-covered roads, or uneven terrain, the ARB Airlocker provides the confidence and control needed to tackle obstacles safely and efficiently. It is also well-suited for heavy-duty work trucks that demand reliable traction without sacrificing on-road performance.

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.