Out back is a GM 14-bolt axle sourced from a ’76 Chevy truck. Gleason shaved an inch from the bottom of the centersection and fabbed up a disc brake conversion kit that included Ballistic Fabrication caliper mounts. Other features of the axle include Yukon 5.38 gears and a Yukon differential spool. The housing has a custom mount for the upper four-link bars, a Ballistic Fabrication diff cover, and a limiting strap. Suspending the rear of the truck are a pair of 16-inch-travel Fox 2.5 air shocks and like the front they fasten to custom upper mounts.