The nuts in the center that need to come off usually have a metal tab folded over into one of the slots in the nut from a keyed washer that acts as a keeper to help prevent the nuts from working loose during driving. Just have to fold the tab out and away from the nut. I use a flat screwdriver or a small chisel, bending it out just enough to clear the nut. Just mentioning it so you look for them, sometimes they are hard to see, and if you try to turn the nut with it locked anyone outside your garage may think you're heading to Florida because of all the shouting about sunny beaches.
