Cummins ISM 6 Cylinder 10.8 L Diesel Engine, 2006 US EPA Label, Air Conditioner, Cruise Control, Power Windows, Engine Brake, Eaton Fuller RTLO-16918B 18-Speed Manual Transmission, Meritor RT-46-160 Drive Axles, 4.56:1 Axle Ratio, 42 in Flat Top Sleeper Cab, Aluminum Front Wheels, 11R24.5, Neway Air Ride Suspension, 233 in Wheelbase, PTO, Air Sliding 5th Wheel, Dual Fuel Tanks