Detroit DD13 6 Cylinder 12.8 L Ultra Low Sulfur Diesel 450 hp Engine, Engine Brake, Eaton Fuller RTLO-16918B 18-Speed Manual Transmission, Double Differential Locks, 20000 lb Front Axle, 64998 lb Rears, Meritor RZ-166 R-SRS Drive Axles, 4.89:1 Axle Ratio, 84998 lb GVWR, 425/65R22.5 Front Tires, 11R24.5 Rear Tires, Dual Steering Boxes, Double Frame, Airliner Air Ride Suspension, 340 in Wheelbase, Dual PTO, Steel Tank, Catwalk w/Guardrails, Gardner Denver TEE 138 GPM Triplex Pump, PTO Loading Pump, Propane Fired Burner, Rear Mounted Propane Tanks