Sounds like a bad hub bearing, try this test, get up to the speed the noise starts, then quickly turn left, then straight, then right, do this on a straight section of road, if the noise goes away during one of the turns, the opposite bearing is bad. If noise does not go away, then it's inside the pumpkin, carrier or pinion bearing.
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Sunday, March 14th, 2010 AT 10:49 AM