I have a 4x4 auto. I went for my first offroad last weekend and it was awesome. I was wondering when or if I should use the 1st and 2nd gear positions when in four wheel drive? Do these gears make a difference in 4x4? Going up hill? Down?

Also. Do most 4x4's require users to backup 3 feet to unlock the hubs? My brother has a dodge ram truck and he tells me he doesn't need to unlock the hubs.

Thanks