River rat,
You bring up a concern of mine, which is discussed at length in my thread I linked. I heard some bad things about the standard Dodge transmission, 66RFE or 68RFE, as well. Been researching tow vehicles online and on foot, test driving, visiting large volume dealers out of town, etc. for a month.
When poking around here, Airforums (Airstream), and Dodge specific forums like DodgeRamz and Cumminsforum, I'm not seeing much to support the poor reputation I had heard of regarding the standard Dodge transmission. Heard from many folks that actually had contrary opinions. 160,000 miles, 60,000 towing, never had an issue, type of stuff.
But yes, it's on my radar as well now that our focus has shifted towards the Dodge 2500 mega cab. I called local sales guy the other day and asked him to find out if I could get the optional AISIN transmission if I ordered a truck with 6.4 Hemi.
The fact that Dodge is only manufacturer I know of that offers an upgraded transmission is concerning enough. But they only package, special orders for most part, with the diesel. Even then only on the 3500 series. Not holding my breath, but I was curious enough to ask.
Final thoughts. I suspect that many issues with the standard transmission are young kids hoping up their trucks, custom tuners, and such. I'm only 42, but you know what I'm saying. I sought out folks with issues, and was empty handed.
Dan
NC