I'm not sure whose "theory" you are talking about but, you are correct, it is NOT true.

Yes the hubs disengage briefly when you put it in reverse, but you are still in 4WD as soon as a load is put on the front axle.

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Michael Girardo
Member - MAXC | Moderator - XOC
www.avaloninternet.net/users/bythebay/xterra <---Newly updated