I have Grover vintage tuners on one of my guitars, and the 'gear box' has become loose on the low E. And since the tuner itself is connected to the gear box, when the gear box gets loose the guitar goes out of tune! I read that there is a tab to lock it in, I thought it might have come loose, but when I took the tuner out and looked in the front there was nothing that looked like an obvious fix. Sorry for making a short story long, but does anyone know a fix for this or do I need a new Grover?