I test drove an 09 with the auto and liked it. Just wish that I could test pull my trailer up a 6 or 7% grade with the new auto. Or downhill with it so I could see how the auto and factory exhaust brake work together.
I did have an 03 with an auto for a very, very breef time. Completely different transmission than the 68re but geeze I hated it.
Trust us, the new six speed automatics, 68RFE or Aisin in the cab and chassis version, are very different products than the old slush box MOPAR automatics of the past. They act more like a manual transmission that can declutch when stopped and shift itself from gear to gear.
Besides that, they have much better gearing including low first and reverse, even spacing, and double overdrive and they DO NOT use the lousy dual mass flywheel and clutch assembly that the G-56 manual uses fails early and often.
The engine, vgt exhaust brake function, and automatic transmission are all carefully integrated to work as a package together. You will be impressed the way they can hold the combined weight of a heavy truck and trailer on a steep down grade without ever touching the brakes.