ARB 4015 Air Locker Locking Differential

The ARB 4015 Air Locker is a pneumatically operated locking differential designed for serious off-road performance. When engaged, the Air Locker locks both wheels on the axle together, delivering maximum traction in low-grip conditions such as mud, rock, sand, and deep ruts. When disengaged, the differential returns to completely standard operation — offering no on-road compromise.

Key Features:

• Selectable locking differential — fully engages and disengages on demand
• Pneumatically actuated via ARB's compressed air system (onboard compressor or external air source)
• Provides 100% torque transfer to both wheels when locked
• Zero performance penalty when unlocked — operates as a standard open differential during normal driving
• Heavy-duty construction engineered to withstand extreme off-road loads
• Compatible with ARB's twin air compressor systems for cab-mounted control
• Backed by ARB's global reputation for off-road engineering excellence

The ARB Air Locker system is a proven choice among four-wheel drive enthusiasts and professional off-road competitors worldwide. Designed and manufactured to ARB's strict quality standards, the ARB 4015 delivers reliable, repeatable locking performance for demanding terrain.