Less "4x4" and more "AWD", but, here' some info:
The permanent all-wheel-drive transmission is called 'Torque on Demand'; this fully automatic system features two differentials and an electronically controlled coupling. It sends traction to the front wheels, rear wheels or a combination of both depending on road and grip conditions.
The Panda 4x4 also gets an electronic-locking differential to work with the electronic stability control system below 31mph, proper mud and snow tyres and a shorter first gear for the manual gearbox on the TwinAir version. A new six-speed manual also makes its debut on the Panda 4x4
1988 Unimog U1700AG