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Hi,welcome to Just Answer. wine and or moan sounds from these is caused by air entering the system usually from the "o"ring on the feed tube or from a leak in the feed hose . look in the resivour when the noise is occuring to see if the fluid is foaming . if not the filter in the resivour is plugged or the wrong fluid is being used. the "o" ring has been recently updated by honda to adress this problem so even the new pump you installed might have the old style "o" ring . heres a bulletin that explains the problem click HERE