Did you use Honda PS fluid? Theirs is quite a bit different in viscosity & additives, and using ATF like most Japanese cars do will usually cause some whine. I tried MaxLife ATF in my Odyssey before I knew about this and it was not happy. MolaKule said the add pack & viscosity are significantly different; I drained the ATF and put Honda OEM fluid in and all was well.I did have that, and changing the O'ring and new power steering fluid fixed that. Thanks for the thought though. I will check it again though to see if turning the wheels reproduces the noise as well. But I do hear it on a straight stretch of road, near where I live I can get up to 50mph .