The way I know it to be is either 4 wheel, or 4H lock, or 4L lock. I never drove very fast with 4H lock on, but it does feel a bit more loose in the rear end when I do. Do you have a manual? I know when I turn off the stability it gets a little loose, but only when I goose it and crank the wheel. Otherwise I cant get this thing sideways. Probably one of the most stable vehicles I've driven
