Wrong again. The AWD is not a differential, and it has no differential in it. What idiot told you that there was a differential involved here?
The power goes directly to the rear output shaft, and the viscous clutch connects that to the front output shaft. If the front drive is running at the same speed as the rear, as in normal conditions, the fluid doesn't heat up and power is split evenly. Anytime one side spins faster than the other, that action forces fluid through restrictions in the clutch, which heats the fluid. The fluid resists any difference in speed of the two output shafts.
So without the front driveshaft, the fluid combined with the clutch components have to turn the front output shaft. It is not a differential, which splits power as much as possible. The AWD tries to do the opposite, it wants to equalize the power split.
This horse is dead, someone shoot it. Night,