Abstract: A wire winding reel attachment for use on a tractor for winding electrical fence wire is journalled at a rear rotating shaft bearing at a vertical height established by a stanchion attachable to a vertically movable tractor draw bar. This draw bar may be raised to align the rotating shaft with the tractor power takeoff shaft for powered rotation. Vertical movement of the drawbar effects a tilting of the rotating shaft with respect to the oncoming wire so that the wire is caused to traverse the rotating shaft as it is wound thereon. A rotary slip clutch prevents overload of the reel either during winding or as a safety feature in the event that the reel or the wire is contacted by persons or livestock. A subassembly of the winding reel attachment tractor mount assembly permits removal of the winding reel and a shaft for rotatably mounting external to the tractor mount such as for unwinding wire wound on the reel.