Hi all. I have a B&W 18K slider fifth wheel hitch. I have noticed that this year (don't remember if it happened last year) that when I take off after coming to a complete stop, there is a slight clunk that can be heard, which I believe is coming from the hitch. Also can be heard sometimes when coming to a stop. I checked the hitch, and all the bolts are tight, but I am able to move the hitch forward and backward by hand just a bit (1/4 inch?) and that seems to be the source of the sound. The lever for the slider is all the way down. Also, I have only used the slider twice in the year I have had it. Is this normal wear for a slider? Anything to be concerned about? This is the only time any noise comes from the hitch, no chucking at all going down the road. Thanks!