Replaced hub over a month ago. All a-arm bolts were tight. I replaced the ISS this afternoon. Steering definitely feels much tighter but did not fix the clunk. My pitman and idler arms are tight but does that keep them from being worn out? Not sure exactly how to explain it. I've heard they can clunk....? Put the truck in neutral and shut off, rolled down hill slowly listening inside and out; still can't pin point the damn noise. You can feel it through the floor boards anywhere in the cab just before you come to a complete stop.