NEW Dodge 2013 Ram 3500 4x4 -> ride is horrible! What to do?

Can't believe the dreaded driveline vibe is still alive and well with the Rams. My first three Rams with C channel chassis and Dana rears didn't have any vibration. My two 3rd gen box chassis Rams both had it. Drove me nuts trying to figure it out. Chrysler and dealer first admitted there's a problem. Then said it's normal, don't bring it back. My F250 will beat you to death but, not even a hint of vibration.