I saw a sign in one of the local AutoZone's that said about cv joints, how to tell if they're worn. 1, vibration at high speed 2, popping at low speed turning. I wonder if this could be it, my truck has 106K miles on it. I had the front wheels balanced and the vibration was almost gone for about a week. I wonder if a balancing cancels out the vibration of the cv joints until it gets too much ? Just a thought. The cv joints are those the complete "half shafts" that go from the transfer case to the front wheels ? Also, all people who have this problem all drive 4WD ?
Bert