Check the terminals on the starter, these nuts tend to loosen up and do not provide a solid contact. When they heat up they expand, and excaberate the condition. There's a YouTube video of it out there. My 06 had that issue and all it took was a really fun time (insert sarcasm here) getting up in there to tighten the nuts down. If that doesn't do the trick, we'll try something else.
06 Limited Hemi QDII
CBEngineering Coilover Lift Kit, tie rod ends, U+L rear control arms, RRO front UCAs, adjustable track bar, JKS QD sway bar links, Steel Armadillo diff cover and A/C armor, 4xGuard full Matrix, rock sliders, rear sliders, and belly guard, Wilco Offroad Hitchgate, all riding on ProComp Series 29 17x8.5 wheels with 265/70r17 Nitto Ridge Grapplers
.45ACP...because shooting twice is just, well, silly.