Quote:
Originally Posted by ainarssems
Don't forget that BMW also do their version of 4WD xDrive.
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I meant to mention that and did indeed forget
The 4wd E34 I've seen has the diff cast in to the sump and one of the output shafts goes through the sump right under the crankshaft. It has to have a steering box instead of a rack because of the room the 4wd system occupies. I think the 4wd Sierra had a similar arrangement.
Theoretically thats the ideal way to do a 4wd performance car (with an engine anyway) since you still have decent weight distribution but benefit from extra traction, but I suppose there will always be compromises somewhere.