Thanks, makes more sense now.

So essentially that rearward shaft is just taking 50% of the torque from the front final drive back to the rear diff without anything fancy going on inside?


Would the step between active diff and none at all be something like a Torsen or a viscous coupling then? i.e. not interfered with electronically (not in the same way a Haldex works, that would be a REactive wait-until-you're-already-understeering system), purely a mechanically PROactive system?