Hi:
You have a wheel bearing problem on the right side. When you make a sharp right, you remove a lot of the vehicle's weight from the right side of the truck and the noise goes away and returns when the weight returns to that side.
If you have a way to safely lift the truck, check for play at each wheel (in / out / side to side) I believe you find on of the wheels on the right side of the truck has more than the others.
Let me know if this helps.
Joe
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Saturday, December 20th, 2008 AT 2:23 PM