J/30 Class Association Forums J/30 Forum The Boat, Sails and Equipment Lewmar 30 rebuild?

So it seems like something has broken loose on my Lewmar 30's this past season. A small armature in the channel that catches the sheet looks broken and is spinning freely while winching (see photo). What is this part? Can it be replaced? (thinking the winches are ready for a rebuild anyway. Spring is on the way!

-Josh