The 750 never had very fast hydraulics because of a small pump, especially if you have power steering. If it is slower than it used to be , chances are you have a resticted sump screen or filter. I would drain the oil and clean the screen first. If there is any water or condensation in the oil, the screen gets a coating of "slime" on it and restricts flow. If that is the case, an oil change for the transmission is in order. If filters and oil check out, then chances are you have a worn pump. How many hours are on it?