A hydraulic energy recapture system of an agricultural, construction, or industrial vehicle or machine having an engine , a driveline , and at least one axle having at least one service brake , the hydraulic energy recapture system comprising: a power-shuttle transmission connected to the engine , said power-shuttle transmission having an input shaft and an output shaft , said power-shuttle transmission further having a forward shuttle gear train , and a reverse shuttle gear train in parallel with said forward shuttle gear train , said forward shuttle gear train having a forward shuttle clutch selectively coupling said forward shuttle gear train with said input shaft , said forward shuttle gear train further driving said output shaft when said forward shuttle clutch is engaged, said reverse shuttle gear train having a reverse shuttle clutch selectively coupling said reverse shuttle gear train with said input shaft , said reverse shuttle gear train further driving said output shaft when said reverse shuttle clutch is engaged; said output shaft of said power-shuttle transmission driving the at least one drive axle ; said hydraulic unit is coupled with said output shaft of said power-shuttle transmission , said hydraulic unit being operable to convert rotational power to hydraulic pressure and flow, and to convert hydraulic pressure and flow to rotational power; and a pressurized hydraulic accumulator is in hydraulic communication with said hydraulic unit operable to store hydraulic fluid under pressure characterized in that : the hydraulic energy recapture system further comprising: a hydraulic unit clutch selectively coupling said hydraulic unit with said output shaft of said power-shuttle transmission . a power-shuttle transmission connected to the engine , said power-shuttle transmission having an input shaft and an output shaft , said power-shuttle transmission further having a forward shuttle gear train , and a reverse shuttle gear train in parallel with said forward shuttle gear train , said forward shuttle gear train having a forward shuttle clutch selectively coupling said forward shuttle gear train with said input shaft , said forward shuttle gear train further driving said output shaft when said forward shuttle clutch is engaged, said reverse shuttle gear train having a reverse shuttle clutch selectively coupling said reverse shuttle gear train with said input shaft , said reverse shuttle gear train further driving said output shaft when said reverse shuttle clutch is engaged; said output shaft of said power-shuttle transmission driving the at least one drive axle ; said hydraulic unit is coupled with said output shaft of said power-shuttle transmission , said hydraulic unit being operable to convert rotational power to hydraulic pressure and flow, and to convert hydraulic pressure and flow to rotational power; and a pressurized hydraulic accumulator is in hydraulic communication with said hydraulic unit operable to store hydraulic fluid under pressure characterized in that : the hydraulic energy recapture system further comprising: a hydraulic unit clutch selectively coupling said hydraulic unit with said output shaft of said power-shuttle transmission . <EOS>