So I just noticed that when I put my mower in "N" and try to put it backwards or forwards the mow moves a little and then it catches on something. It's like the tire or brake disc is warped or something as if I push thru it it will catch at the same spot. This also might be my issue with squeaking that happens when I drive it. I also noticed the tire has some wear on it on the inside from the belt. Any idea what to fix here? brake disc?