'06 4x4 engagement/disengagement point?

[Rimjam]

Just moved up in the world - bought an '06 FX4 low miles, pristine shape. I know it's live axle so does the front diff turn all the time truck's moving? Front driveshaft? Where exactly is the 4wd engage/disengage point? All in the transfer case?

 

[SenorNoob]

AFAIK, yes just the transfer case.

 

[pjtoledo]

the front axles and driveshaft are always turning.
also the chain inside the transfer case is always turning via the front driveshaft.
inside the transfer case is a collar that couples the chain and the rear output thus engaging the front drive.