Cummins Diesel Engine, Allison Automatic Transmission, Differential Lock, 18000 lb Front Axle, 58000 lb Rears, 88000 lb GVWR, Aluminum Wheels, 385/65R22.5 Front Tires, 11R22.5 Rear Tires, Air Ride Suspension, 320 in Wheelbase, 36000 lb Capacity, Center Mounted, 24 ft - 60 mm 3 Section Boom, Crosby Group 1 Sheave 15 ton Capacity Hook Block, Dual Controls, A-Outriggers, Rear Outriggers, x 103 in Bed, Aluminum/Steel Combination Frame, Air Sliding 5th Wheel