Requires: air compressor (sold separately).

The ARB Air Locker Differential for the AMC Model 20 axle suits ratios of 2.73 and down, for the Jeep and AM General Hummer models in the fitment table. It acts as an open differential when unlocked.

Part number: RD187

ARB silver differential.

With the flick of the switch an Air Locker gives instant lock at any moment and its super strong design allows activation at any speed allowing you to tackle the toughest terrain. The advantage of the Air Locker lies in the pneumatically operated locking system inside the differential. When activated, the Air Locker prevents the internal differential gears from rotating and therefore prevents the axle shafts from turning independently of each other. With both wheels tied directly to the rotation of the ring gear, the vehicle maintains maximum possible traction at all times. When unlocked, it operates like a conventional open differential. An Air Locker equipped vehicle can be driven in a slower, safer and more controlled manner, greatly reducing the likelihood of vehicle damage and environmental impact.