Welcome to RF!
I'm one of them die hard Ram guys, have been since I was 11 when the movie Twister came out and saw that big beautiful red 2500. But I respect other peoples opinions and don't jump on them for speaking their minds, no matter how wrong they are, j/k...hahaha
As far as going from a 12 to a 07, it is a down grade but give her time, you'll come around and learn to love the Ram just as much. Might miss the creature comforts of a new truck but that's what modifications are for, lol.
Like it was stated already, the tranny issue's were with the second gens. When I traded my 99 in, it still had the original tranny with 146k miles on it with no problems...well that was until about 50 miles before I traded her in and messed the tranny up real good off roading like a ****, lol. I beat the stuffing out of my old Ram before trading her in, still miss her for she was the first Ram.