Thanks for the reply, nickwe21

I'm not sure what an NA is, but it's not an SRT6, just a base coupe. And it may not even be a problem with the TCM... I'm getting a lot of conflicting information and becoming convinced that dealership mechanics don't really know much about these cars! :-D They told me there was noting they could do to fix it. but whatever *was* wrong has apparently fixed itself... Maybe it just likes cold weather better!?

You're guess is as good as (or better than) mine!