Thanks for reply. I was playing around with this. It does seem to snug up a little when tightened down which seems to work. I have driven it for a few hours since doing so and the gears are working without issue. I was also concerned about over tightening. For now, I just snugged it down a bit more then last time. If it occurs again, I will tighten a touch more and then add a drop of thread locker as you suggest. Fingers crossed. Thanks again.