That isn't possible as the gearbox casing would have to flex which can't happen.
Not using enough gear grease would cause it as the pinion gears seem to be a harder metal and you are running metal on metal.
I noticed that mine has a tight spot that I'm trying to solve other than that it's sweet as a nut.
I got a huge tub of molly grease for cheap as chips as I think you get no where near enough in the kit.
