The creaking I was experiencing occurred when stopping and over large bumps. If you are hearing creaking only when turning, then I would check the ball-joints, tie-rod ends, and other steering linkage. But from my experience, most front end noises on my '94 explorer came from the RA bushings. If you haven't yet, replace the bushings w/ high quality replacements, NOT the Ford parts, I got mine from AutoZone.