As the title states. I have a shake in the rear of my truck, constant. It feels like a tire out of balance, but we have checked them three ways to sunday and they balance. Moved the front tires to the rear, shake stayed in the rear. Checked new wheels for a bent one, no luck. running out of options. Next thing on the list is to change the U-joints and see if that helps. Any other ideas? Have to get this stopped, driving to Nashville next week.