Hey those 2 txt attachments and the pic is dead T4 Primera.
Heres some info I found on the T4 4wd system, maybe similar to what you had posted?
It has viscous limited slip differential at the rear, front viscous coupling between the transfer case and driveshaft, and an open front differential. This means if a rear tire loses traction, power is transferred to the opposite wheel. If a front tire loses traction, some power can be transferred to the rear diff through the transfer case. It has ATTESA - Advanced Total Traction Engineering System for All-terrain, which is not a true 4WD.