I know it's late replying to this but if I may add,
Hulkmn069 said " i'd want all four turning in the mud at all times"
Now in 4x4 part time you are locking the front and rear together but not all 4 wheels will spin together. You may get 1 front, left or right, and 1 rear, left or right, together. I order to have all 4 locked and spinning together you'd also have to installed some type of locking differential as well so you'd have 2 fronts, left and right and 2 rears, left and right.
Just don't run in on the pavement like that.
Thanks
Ta Ta