Most times they slide right off, and the nut comes loose if they have been outside and rusted up the nut is a bit harder to get off you use the impact to shock the nut free.What? Impact knocks them off with little holding and after that isn't it only a slight tap of plastic hammer and it falls off? OR, at least not that tight at all? Heck, even later car/truck alts, had NO key and just had to tap them a bit and slid right off? I'm not familiar with this brand you speak, but most by Delco are same and shouldn't be a big issue wouldn't think? OK, I'm done, going away now!