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Fits in gauge opening
Designed for maximum reliability with minimal moving parts
Sandcraft DOES not warranty these bearings nor any installation in any way
Super-aggressive tread design features 1 1/8-in
ARB RD139 Air Locker Differential for 2006-2007 GMC Sierra 2500 HD and Chevrolet Silverado 2500 HD Nissan D21 XE 1986 Fits in gauge openingThe world's premier traction aid, an ARB Air Locker(TM) keep you moving in all conditions. 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
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