[Rick Norwood]

I know you said that you replaced the right wheel bearing during the Tranny rebuild. But I assume that means the left one was good.
Does this noise happen at idle?
Does it go away at certain speeds?
Does it come back at higher speeds?
Does the sound go away during a right turn? A left turn?
If you run it on a freeway and go through a high speed right curve or a high speed left curve do you notice any difference?

I fought a similar noise for months and finally found the culprit on a freeway curve, the noise stopped. I replaced both front wheel bearings and the problem was solved.