A clutch for driving a pair of output axles for a drive mechanism includes a driven clutch bevel gear mounted on a clutch shaft. A pair of clutch rings is disposed on opposite sides of the bevel gear and slidable along a clutch shaft, to selectively engage a pair of driven gears. A pair of clutch arms engages the clutch rings for moving each clutch ring between its engaged and disengaged positions, and a plurality of springs disposed along the clutch shaft biases the clutch rings to their respective engaged positions. The drive mechanism may include a mounting member having a running surface for a hydraulic motor, a pair of arms on opposite sides and extending away from the running surface, wherein the clutch shaft extends between and is supported by the pair of arms.