dont ya still have to keep them from spinning, even with the impact ?????, i used a long breaker bar, and try'd the penny trick, i'll see if i can find it and post a pic of the cool ass teeth marks left in it while the gears chewed it up and spit it out the other side, musta been too thin, cause a little thicker piece of aluminum worked great, they make a tool for it, but i couldnt see spending $18 on a piece of aluminum just because it was anodized all pretty, it looked like one of those keychain beer bottle openers, just get a 1/4 inch thick piece of aluminum and hold it in there while spinning the gear till it jams them, then loosen the nut, impact or breaker bar