Cat 6 Cylinder 14.6 L Diesel Engine, 1991 US EPA Label, CARB Compliant, Engine Brake, Eaton Fuller RTLO-16618A 18-Speed Manual Transmission, 12000 lb Front Axle, 40000 lb Rears, Dana DS-402P Drive Axles, 23608 kg GVWR, 60 in High Rise Sleeper Cab, Aluminum Wheels, 11R24.5, Air Ride Suspension, 246 in Wheelbase, PTO, Wet Kit, Air Sliding 5th Wheel, Dual Fuel Tanks