BEEP® power chassis is available completely assembled and includes motors, couplers, circuit board, wheels, pickup rollers etc. to allow complete replacement...just pop off the BEEP® bodyshell...on your BEEP® Diesel. Also suitable for (but may require some modifications to whatever non-RMT bodyshell you may use) the original KUSAN diesel, Williams Electric Trains version and the diesel offered by Toy Truck Collector/Taylor Made Trucks. NOTE: The replacement RMT-92301 BEEP® CHASSIS includes lights/couplers but does not include any bodyshell components such as railings, windows, chains etc. RMT92301