I have found it best to leave the both hubs locked in the snow, with one hub locked it wants to pull eractically to the side thats locked. Ive talked to few guys are into rock crawling and dont like the detroits at all because they will dissengage at times. They said that they run spools or "lincoln lockers". One of the fellas even drove on the street some with a spooled rear end, he sad it wasnt that much different than a detroit on the street. I guess if I get a selectable for the front it will be an ox because theirs know one around here that can install the other kinds.