Generally, I run around town in 2wd this time of year. Very little snow or ice to worry about in Kansas in June. Every once in a while I will operate the Auto4wd selector - more than anything, just to play with the buttons that don't get played with often, but as a test as well. I have noticed that when I'm in Auto mode, there seems to be some sort of slight squeaking noise when moving. Not a loud squeal like one might expect from brakes or a bearing going out, but more like the squeak you hear when the idler bearing is getting ready to go out, and not continuous. It's only when rolling, and just a little squeak-squeak-squeak. I should note here that I have only observed this noise when at a non-road speed. I've heard it when driving through a parking lot at lower speeds, like 15 or so. I've not yet dug in deep, I just noticed this(once again) yesterday when gliding through a lot, so I cannot say where it's coming from yet, or what it does at speed, etc. Does this sound like something anyone's run across before? This truck sat abandoned for a short period of time, so lack of lube is something that comes to mind. Everything else on the truck seems to work quite well, and that makes me hopeful that this new, fun little noise to chase down is a relatively painless issue. . .