" I have a hurth 150 v drive and have some questions. The supposed capacity is 1 liter of ATF. But after draining it from the base drain plug, 1 liter of fluid seems to over fill it. Question one: Is that 1 liter capacity really accurate? Question two: what type of sealing ring goes on the drain plug, compression washer or ???? Question three: The manual only says fill it with ATF fluid. Is one type better than another? Thanks for any help. "