Found this video on YouTube while watching Ecoboosted's exhaust clip. It was made in response to a Subaru owners Internet claim that we have a slip in grip type of AWD. Hopefully this link works.
I agree, it does not prove or disprove anything...Well I would love to have his explanation of the system from the Ford engineer that he claimed at the end of the video. And technically his video does not prove we don't have a slip n grip AWD system by definition. It could still be just responding to slippage, just extremely quickly. And I don't think that is a bad thing. Now that being said, the AWD graphic on the dash really makes it seem that it responds to throtte input, but that's just a graphical representation and possible gimmick. I personally think it's a combination of factors that controls where power is being sent including slippage. The complete absence of torque steer is not due to a system that is redirecting power(~400lbs tuned) purely upon wheel slippage. No we don't have the sweet RS AWD system or Subaru's system, but it's much better than many AWD systems out there.
This is on topic, but takes a bit to explain. Artificial intelligence software is everywhere. AI "savants" (one with specialized knowledge and/or skills) range from skill centric to "big data" centric. Sometimes an AI savant is "subsumed" by other savants. End point here? The "tipping points" for one behavior to replace another can be adjusted under software! So with engine, braking, front/rear allocation under software control, aftermarket tuners have a whole new market for software upgrades besides "only" engine. OMG, I love the 21st century!...it kicks in when the computer thinks it is needed and that is not just under slip fact.
I actually had a hard time getting it to kick out. Not to say that I couldn't get it to do some legit donuts! At least in comparison to my last car (2005 Audi A4). We are supposed to get some more snow tomorrow. Trust me, I will try again. I will say that at least the AWD is predictable!One thing that points away from a purely reactive AWD application (i.e. that torque is sent to the rear only when the front wheels experience slipping) is that it WILL oversteer under the right conditions. Turn off the traction control, head into an icy or snowy corner at low speed and hit the gas when the car is mid-turn and the back will kick out slightly.