Quoted from billsfanmd:great....easy or pain in the &^%%^? I suspected gears. He said def has a lot of plays.
should I replace all gears or just the offending gear ?
If you are going through the trouble of disassembly, I'd replace all the gears. They do get brittle as they get older and while you've got the mechanism apart, you may as well put all fresh gears into it for the extra couple of bucks.