The factory GM 7.625 did not apply power in a 50/50 ratio to each wheel. And the factory Torsen in a Miata is the same. Does a TrueTrac apply power evenly?
The 7.625 Torsen we have always has done something that is very odd that I never understood. When on ice, implying zero traction - one wheel spins and the car would not move anywhere without someone pushing. But on dry pavement it would leave tire marks of equal distance. I never got my mind wrapped around why it operated in this manner on ice. Any ideas?
That's exactly the behaviour I described above. On Ice, you have zero traction at all, equal to both wheels. So the torsen-type diff would need some resistance on the spinning wheel to distribute power to the other side.