Thanks guys, the 3500 SRW crew cab long beds are like hen's teeth, seems like most of the 3500's are duallies. One with the 6.4 Hemi is ever harder to find even with a nationwide search. So, a clean 2015 with the diesel (68RFE) and 81k miles popped up closeby and I'm seriously considering it. Caught me somewhat flat-footed because I hadn't done any research on a diesel, I've never owned one, and now I have a zillion questions LOL. I found a great truck in NC that had the Aisin, but at $45k for a 2015 was a budget buster for me.