A transmission for a vehicle including a hydrostatic regenerative braking system includes a first rotatable shaft having a first end adapted to be driven by a first prime mover and a second end adapted to be coupled to a vehicle driveline. A second shaft selectively drives the first shaft and is adapted to drive a hydraulic pump of a second prime mover. A planetary gearset includes a first member restricted from rotation, a second member and a third member. A transfer mechanism includes a first sprocket fixed for rotation with the second member, a second sprocket fixed for rotation with the input shaft and a flexible member interconnecting the first and second sprockets. A clutch transfers torque between the third member and the first shaft.