As woody has been experimenting with the sensor inputs and how to trick them into believing that the front wheels are turning, maybe a signal generator that takes a trigger from the rear sensor, but then adds a slight delay to the pulse, so that they all aren't EXACTLY the same (in sync)?

I'm going to have to call the dyno guy I guess as they have YET to get back to me... I'm about ready to start searching for a AWD dyno in the Bay Area... if not there, I'll force myself to take a road trip to Southern California...

Good luck Jenzie!... Keep us posted!