IS this only when moving?
If so, it will be something inside the tranny or at the rear of the tranny or back toward the rear end.
Could be a wheel bearing/seal/dust-shield,,ANy recent work on the wheels???
Have you trued disconnecting the speedo cable from the tranny and then drive it to see if the noise goes away?

There is enough good in the worst of us and enough bad in the best of us that it does not behoove any of us to criticize the rest of us.
-
-
Be yourself. If you are ever lost, It will be much easier to find yourself if you know who you are!