ring and pinion slop/clunk, soulds like a U-joint

Take care of the problem before it gets worse and breaks other components causing your repair bill to go up. Slide yourself under the truck and rotate driveshaft to look for play in u-joints. You can do this with the truck parked or if they arnt that bad yet you may need someone to put the truck from reverse to drive while you view the u-joints. Be careful to place your body out of the way when doing this.

NOW.THE U JOT MAKES A POPPING OR LICKING NOISE