I'll tell you this, if it happens to me I'm probably going to dump the vehicle. I think it's pretty lame all the grandma technology they build into these vehicles and don't allow you to turn it off. Once it's engaged it shouldn't disengage. And you shouldn't need/have to be in 4low your rpms will be screaming. I go to Pismo Beach out here in CA about 2-3 times a year with a large group of family and friends so if this thing doesn't perform I'll be looking to get back into an F150.
2012 Laredo X 4X4, 5.7 Hemi, luxury package. Mods: 2.5" RR lift, ProComp 7036 wheels, 275/65-18 Wrangler Duratracs. Pics in my gallery
Mild wheeling in my WK2: http://www.youtube.com/watch?v=AueMXQvqCBE&list=UUzGUjoJwwUpCb5Ea05FVtPw& index=2&feature=plcp