The rear axle is a full-floating Corporate 14-bolt that's been upgraded with 4.88 gears, a Detroit Locker, and disc brakes. Like the front, the rear axle is suspended by supple National Spring leaf spring packs and damped by Rancho 9000 shocks. An air tank sits above the rear axle. It's filled by a converted A/C compressor on the engine and is used to power the Air Locker and to air up tires. Behind the air tank, a custom 50-gallon fuel tank keeps the thirsty big-block fed.