Here's the link to the other Rebel forum thread on it. You can see everything the owner is sharing.
2 Months old and engine locked up | Ram Rebel Forum
Honestly don't have an answer. There are a lot of speculations about what's causing it, and "fixes." The most common are:Good to know that this was one of those rare cases. Would opening up the hood vent like this guy (http://www.ramrebelforum.com/forum/what-did-you-do-your-ram-rebel-today/2994-working-hood-vents.html) lower the risk of this happening since it's an overheating problem?