A compounding drive , comprising: an input member ; an epicyclical gear arrangement connected to the input member ; an output member connected to the input member via the epicyclical gear arrangement ; and a hydraulic pump/motor set connecting the epicyclical gear arrangement to the output member through an overrunning clutch for unidirectional communication of mechanical rotation between the input member and the output member, and characterized by comprising a first intermediate member , a second intermediate member , and a third intermediate member , wherein the epicyclical gear arrangement interconnects the input member to the output member and the first intermediate member , wherein the second intermediate member , the hydraulic pump/motor set , and the third intermediate member couple the first intermediate member to the output member such that the overrunning clutch is between the hydraulic pump/motor set and the epicyclical gear arrangement , wherein the epicyclical gear arrangement includes a pinion gear , a plurality of planetary gears , a planetary gear carrier , and a ring gear , the pinion gear is fixed relative to the input member , the planetary gear carrier is fixed relative to the output member , the planetary gears are each supported for rotation relative to the planetary gear carrier and are intermeshed between the pinion gear and the ring gear , the ring gear is fixed relative to the first intermediate member ; and wherein the over-running clutch includes a drive member , a driven member , and a latch feature , the drive member is fixed in rotation relative to the first intermediate member and is connected by the first intermediate member to the ring gear . an input member ; an epicyclical gear arrangement connected to the input member ; an output member connected to the input member via the epicyclical gear arrangement ; and a hydraulic pump/motor set connecting the epicyclical gear arrangement to the output member through an overrunning clutch for unidirectional communication of mechanical rotation between the input member and the output member, and characterized by comprising a first intermediate member , a second intermediate member , and a third intermediate member , wherein the epicyclical gear arrangement interconnects the input member to the output member and the first intermediate member , wherein the second intermediate member , the hydraulic pump/motor set , and the third intermediate member couple the first intermediate member to the output member such that the overrunning clutch is between the hydraulic pump/motor set and the epicyclical gear arrangement , wherein the epicyclical gear arrangement includes a pinion gear , a plurality of planetary gears , a planetary gear carrier , and a ring gear , the pinion gear is fixed relative to the input member , the planetary gear carrier is fixed relative to the output member , the planetary gears are each supported for rotation relative to the planetary gear carrier and are intermeshed between the pinion gear and the ring gear , the ring gear is fixed relative to the first intermediate member ; and wherein the over-running clutch includes a drive member , a driven member , and a latch feature , the drive member is fixed in rotation relative to the first intermediate member and is connected by the first intermediate member to the ring gear . <EOS>