The upper gearbox isn't attached so it's not the piston lol
I shimmed from the bevel / pinion, leaving less than .10 movement on all gears, and there are no noticeable noises coming from the gearbox, It would actually be nice if it were something like that, but it can't see it.
Maybe I will take a shim off the top of the bevel so it accepts the pinion a bit better?
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