'05 Odyssey moaning noise (38k)

My '05 Odyssey makes a noise I just can't ignore. At speeds of around 70-75mph, after dropping into 5th and torque converter locks up, the engine moans if I encounter any tiny hill or push the throttle down just slightly. It's horrible. My '00 did this a little bit at really low speeds, but this is much worse and makes freeway travel exhausting. The dealer says they don't think there's a problem, but I can't image that awful sound is being heard in every '05 Odyssey in the USA. Any ideas? I love the van, but I can't live with this annoyance.

yes mine is making noise, also.