Well My son shreaded some gears tonight in is basicaly stock Emaxx. It took two runs on the 4200 to convert the Emaxx into a 2WD moster truck lol So I replaced them with CVDs. Now I guess I have to upgrade my gears. Anyhow, I was wondering if the stock T/Emaxx gears including spiders was hardend? If not, has anyone tried hardening their own gears instead of buying aftermarket gears?