Aerowhatt wrote:So it's brake actuated limited slip.
That is strange since I had the ASC switched off. Or maybe the ASC button doesn't disable all of the electronic braking? The car has far better traction with ASC off than those other rwd cars with open diffs that I have driven.
Spin differential is going to make a difference too. For instance you likely would have gotten better results if the "free" wheel spun slowly. ABS and traction control require wheels spinning within a range of the preferred spec to be effective. Remember we are talking about a computer software program which is making choices. A wheel (drive wheel) spinning outside of the parameters for brake action will get power reduction instead. So just like a non computerized drive system one must give it the right inputs to get the desired results. Unfortunately with a complex system it is harder to know just what those input are!
I know one thing for sure, it has far better traction on snow and ice (so far) than any open differential vehicle I have ever driven including my VW panel MicroBUS which had similar weight distribution. I believe it also has better traction than a positraction rear wheel drive Jeep pickup that I use to have. I'll need the rest of the winter to know how much better.
Interesting results in the wheel off the ground test. Raises more questions than providing answers (for me). I figured from the phrasing of the spec, that the differential itself was "open". Positraction provided by braking the wheel with less traction. Which from my experience with manually doing the same thing was preferable to a an actual limited slip differential both in possible available traction and free rolling resistance.