ARB Air Locker Differential

Jeep Wrangler 07-17 3.8L/3.6L

Part #: RD157

Overview

The ARB Air Locker Differential is the ultimate traction solution for Jeep Wrangler JK owners seeking superior off-road capability. Designed specifically for 2007 through 2018 Jeep Wrangler models equipped with the Dana 44 axle, this pneumatically operated locking differential delivers instant, on-demand traction to conquer the most challenging terrain. Whether you’re navigating rocky trails, deep mud, or slippery snow, the Air Locker ensures both wheels on the axle turn together, providing maximum grip and control.

Ideal for serious off-road enthusiasts and overlanders, the ARB Air Locker enhances your Jeep’s performance without compromising everyday drivability. Its reliable pneumatic activation system allows you to engage or disengage the locker at any speed, giving you confidence and control in all conditions.

Key Features

Engineered for durability and ease of use, the ARB Air Locker offers advanced features that set it apart from conventional differentials:

• Instant traction lock activated via an in-cabin switch for convenient and safe control
• Pneumatically operated locking mechanism that prevents axle shafts from turning independently
• Steel reinforced, elastomer bonded annular seal designed to withstand extreme temperatures and harsh environments
• Two-piece ultra-durable design with minimal moving parts for maximum reliability and longevity
• Patented timed locking system enabling high strength and ultra-fast unlocking
• Provides 100% traction on demand without affecting normal on-road drivability or causing driveline wear
• Allows activation at any vehicle speed for versatile and safe off-road performance
• Reduces vehicle damage and environmental impact by enabling safer, controlled driving over obstacles

Construction & Design

The ARB Air Locker is precision-engineered with a robust two-piece construction that minimizes moving parts, significantly reducing the risk of mechanical failure. This design ensures long-lasting performance even under the most demanding off-road conditions. The steel reinforced, elastomer bonded annular seal protects internal components from contamination and wear, maintaining reliability in extreme temperatures and harsh environments.

The pneumatically operated locking system is integrated seamlessly within the differential housing, allowing quick and reliable engagement and disengagement. This robust construction guarantees that the Air Locker can be activated at any speed without compromising the integrity of your Jeep’s drivetrain.

Installation & Fitment

The ARB Air Locker is a direct bolt-in replacement for the Dana 44 axle on Jeep Wrangler JK models from 2007 to 2018, including Rubicon, Sahara, Sport, Sport S, X, Unlimited, and special editions such as the 70th and 75th Anniversary models. Installation requires an air compressor system (sold separately) to operate the pneumatic locking mechanism. The kit includes all necessary components for integration, but professional installation is recommended to ensure proper setup and optimal performance.

What's Included

• ARB Air Locker differential unit
• In-cabin activation switch
• Solenoid valve
• Air line tubing
• Bulkhead fitting

Ideal For

The ARB Air Locker is perfect for off-road enthusiasts, trail riders, and overlanders who demand dependable traction in extreme conditions. It is especially suited for Jeep Wrangler JK owners looking to enhance their vehicle’s capability on rocky, muddy, or uneven terrain while maintaining safe and controlled driving on paved roads. Whether tackling technical trails or exploring remote backcountry, the Air Locker delivers confidence and control when you need it most.

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.