2015 Kenworth T680, Tandem Axle Sleeper Tractor, Diesel, Sleeper , Fifth Wheel, Aluminum Front Wheels, Aluminum Rear Wheels, 2015 Kenworth T680 Tandem Axle Sleeper. Cummins ISX engine!! 450 horse power, 10 speed Eaton Fuller transmission, drum brakes, air suspension, 210 gallons fuel capacity.