VAS Unique Design Feature : Both Driveline throughput (vehicle in motion) and PTO Aux. Applications cannot be engaged (operated) at the same time. Either the vehicle shall run on the road (Driveline) or in a stationary position the PTO Auxiliary Outputs can be engaged. If Both Driveline and PTO Aux. applications are required (to be operated) simultaneously, Kindly refer to our 300 & 360 series gearboxes which have both driveline & PTO Aux. simultaneous options.