I know exactly the sound that you are talking about. I have changed so many freaking parts trying to eliminate it and its still there. So far I have added an RE 1600 trackbar, fast ratio steering box, greased the caliper pins/bolts (as well as ball joints), new u-joints in the axle shafts, new steering stabilizer (and shocks all the way around), and JKS bar pin eliminators..... All of this and still makes this extremely annoying POP everytime I turn. If I put the front end up on jack stands and cut the wheel there is no POP, what else could it be?