AWD Systems

[foryorent]

Any one out there know about the different AWD system that porsche has used in there cars?

I know the 993 system is viscious? coupling that sends between 5 and 40% of the power to the front.

Is the system on the 997 the same?

How about the old Paris-Dakaur? system I have heard about. I think it was in the 959. What was that?

Thanks,
Dan

[foryorent]

"Porsche 959 was a 911-based group-B rally car and had electronic controlled 4WD with dry/ wet/ icy settings"

What system is this? Was the dry setting 100% rear wheel drive?