I had the hydra power rebuilt last fall it wouldn?t work in low and slipped in high. The guy that rebuilt it for me put a new seal kit, oil collector ring, and out put shaft, somebody was into it befor and I?m guessing the oil collector ring was worn because someone machined it and had a bushing in it. Well it still hasn?t worked right since rebuilding it, direct worked fine but unless you had it under a hard pull it wouldn?t engage in low, unless you stopped and put it in low then took off it would pull just fine. Well now it quit working in high and low, it will move a little bit then quit and you can?t feel it shifting from low to high at all. When we had it rebuilt he said the clutches looked like new and he thought the sprag was good. Do you think maybe the pump could be bad or any ideas?