The one way or two way will cause this. Bearing needs replaced, its not spinning freely. As for grinding that too can be related to the two way......However, have him check the shift cable for "play" to see if its starting to break. The cable is a stainless rod inside a "spun" cable that eventually will stretch and break. I would say any more than 1/4" of play and its about to break. Shitty set up, on the cable, IMO. Both are easy to replace and for around $130.00.