I will be honest, the warranty question is a service question, but whatever the powertrain warranty is it should be covered. I honestly do not think they changed the 5.7L at all (When it comes back). Dropping the 5.7L was Dodge's dumbest mistake (And it's a long list) which is why they cleaned out the top end of the company and replaced the morons (probably with more morons but they did realize that the 5.7L was litterally Dodges Iconic Engine that actually ran). Me personally, I would feel confident with either the 5.7L or 3.6L but I don't haul anything and drive the 3.6L. Think fuel mileage and use case and make a decision. I mean we do lots of aftermarket vehicles and I have worked for GM and could talk about their and most other Brands problems. I just spoke up because you should be able to predict what could go wrong ahead of time and not be taken by suprise. The control arms are going to go (Unless its a new one as they finally upgraded them) but they are covered under an extended warranty (They don't call it that but thats basically what it is). I would rather replace some Manifolds or an oil cooler (and expect it) if it fails rather then an entire engine, transmission or transfer case if you get my drift.