The bearings on the starboard side fell apart as i removed the drum, but were quite simple to put back together after a clean. The pawl ratchets simply didn't want move, they were completely caked in in dried up grease/grime.
The whole bearing / ratcheting system looked like it'd been caked in mud and left for dead
Took a couple of hours of careful cleaning and replacing springs/ratchets but now both winches are clicking away quite happily, no more screaming
Couple of pics below
