ARB RD218 Air Locker Differential for Land Rover Discovery 3 Rear Axle

The ARB RD218 Air Locker is a pneumatically-activated locking differential designed specifically for the rear axle of Land Rover Discovery 3 vehicles. As part of ARB's world-renowned Air Locker lineup, this differential provides on-demand traction control for serious off-road driving, allowing you to lock the rear axle at the push of a button when conditions demand maximum grip.

Key Features:

• Pneumatic activation system for instant engagement and disengagement
• Application-specific design for Discovery 3 rear axle with IRS (Independent Rear Suspension) system
• Developed alongside the RD217 front Air Locker for complete dual-axle locking capability
• Compatible with Discovery 3 vehicles without factory differential lockers
• Proven ARB Air Locker technology trusted worldwide for extreme terrain

Installation Notes:

Due to the Discovery 3's IRS configuration, installation requires more time than traditional live axle applications. The rear exhaust section must be removed to access the differential assembly. While the overall complexity level is relatively low, adequate shop time should be allocated for proper installation. Professional installation is recommended.

Compatibility:

This Air Locker is specifically engineered for Land Rover Discovery 3 rear axles only. It is not compatible with Discovery 4 rear axles due to axle variations, and does not fit vehicles originally equipped with factory differential lockers. For front axle applications on Discovery 3 and 4, see the ARB RD217.