Rechecking your back lash clearance before the start on the season helps. I set mine .006"-,008" initially and tighten them back to .006" when they get to .010". My Richmond 456 big pinion pro gears were new in 2012. Motive Gear bought out Richmond later and are made Italy now.. I personally don't think the Pro Gears are the same material now. US/Strange gears are still made in the USA.