Thanks so much for this explanation. My Dad and I were just having a "heated" discussion about this, this morning, and this post clears it up for me!
What are your thoughts on this scenario:
When driving on snowy/icy roads in A4WD I notice the truck is harder to control through acceleration, coasting, and, especially, braking. However, when I switch to 4H, control is much better and everything feels more "stable". Is that an appropriate use of 4H? How much would tire type & condition affect the ControlTrac system's ability to appropriately compensate?
What about when the snow & ice is patchy? Based on the comments here, it sounds like it's just best to leave it in A4WD? For example, I was on a road yesterday, turned a corner, where there was a large patch of ice, and started to lose control. If I'm in an area where I know there's going to be a lot of patches of ice and snow, am I better off leaving it in A4WD, or should I temporarily switch it to 4H until I'm out of that area?
Thanks!