I have an '07 Odyssey with the dealer installed tow package. Since new I have occasionally heard a whine like a hydraulic pump in distress after driving the interstate and slowing down at an exit or toll booth. Doesn't do it all the time and I've checked both PS and AT fluids and all are at the correct levels. Hard to get it to do it on a short drive to the dealer and it doesn't do it all the time, but seems to be getting both more frequent and louder. Tranny seems to shift and operate fine, but turning the steering wheel when at a stop seems to change both the pitch and volume of the noise. Power steering pump issue? I'm wondering if it has anything to do with the PS cooler that is part of the tow package.......have no earthly idea why they feel it is even necessary.