Detroit 8V-92 V8 Diesel 500 hp Engine, 843 Engine hrs, Engine Brake, Retarder, Allison Automatic Transmission, Differential Lock, 20122 lb Front Axle, 65878 lb Rears, 86000 lb GVWR, 16.00R20 Front Tires, 16.00R20 Rear Tires, Air Ride Suspension, 212 in Wheelbase, PTO, Pintle Hitch, 2 Spd Aux, Rear Steer Axle, 214 In WB, 115 In Cab To Axle