THE TRUCK WITH ATTACHED TRAILER WAS PARKED ON AN INCLINED DRIVEWAY. THE TRUCK WAS PLACED IN PARK AND THE KEY WAS REMOVED FROM THE IGNITION. I PROCEEDED TO LOAD A COMPACT TRACTOR APPROXIMATELY 2500 LBS. THE TRUCK STARTED TO ROLL DOWN THE HILL AND CRASHED THRU A FENCE DOING EXTENSIVE DAMAGE TO THE TRUCK. I DID NOT TRY TO START THE TRUCK AND WAITED FOR MECHANIC TO ASSESS ANY MECHANICAL DAMAGE. THE MECHANIC CAME TO MY PLACE AND WHEN HE GOT IN THE TRUCK THE TRANSMISSION INDICATED THAT IT WAS STILL IN PARK. DODGE TOLD ME THAT THERE WAS NO RECALL ON THIS TYPE VEHICLE WITH THE TRANSMISSION NOT HOLDING. THE REPRESENTATIVE TOLD ME THAT THERE HAD BEEN SIMILAR PROBLEMS WITH GAS POWERED ENGINES BUT NOT THE DIESEL. I WOULD LIKE TO KNOW IF THIS CAN BE EVALUATED FOR RECALL. NO ONE GOT HURT IN THIS INSTANCE BUT CAUSED EXTENSIVE DAMAGE TO THE TRUCK MECHANICALLY AND COSMETICALLY.