Im uploading a few pics of the internals for folks to gaze at...lol...

There is a detent spring that holds all the disks in the free position, when there is no power going to the coil (elctromagnet)...SO....there should be very little, if any, power sent thru the front driveshaft in TOD disconect mode...UNLESS of course you incur some sort of drivline shock/torque that could overcome the detent spring....

Here are a few pics...notice the 3 balls that sit in the "bevelled ramps"
Pic 2 is ramp down or 2WD
pic 3 is ramp up or 4x4 50/50 split