Lately I have been hearing a faint clunk when I turn the wheel all the way to one side then back. Today I got under the truck and had someone turn the wheel and it seems like the noise is coming from the steering box. I was hoping it was the steering linkage but it looks like I was wrong. Any thoughts on what the problem could be? I have never opened up a steering box before. Do you have to grease it? It sounds like something may be loose in there.