The biggest question I had was IF there was a sweet spot between 2WD and AWD. I was not planning to open the t-case for this first install, I was going to build a plate to slide in and hold the lever in place. I like this idea though, and may try it out on the shift rails for the RHD t-case and see if it works. I am still trying to wrap my head around how it all works with the center diff lock, viscous coupling, synchronizers, counter shaft, chain drive, etc etc etc. In the diagrams looked like the cone synchronizer on the 2WD-AWD gears did not have an opportunity for neutral or it would wear out the syncro unless it was perfect, there was just a tiny spec on that gap. The 4H-4L shift syncro looks more conventional and I think this explains why I did not feel any neutral point on that 2H-AWD shift with the car in park. Yes I would have the tranny in neutral and if there is no problem towing an automatic this way at up to 70mph for thousands of miles please let me know, but generally this is not at all good for automatics...

Thanks for the input.
CH