I was told the same thing; that there is no TCM update available for the transmission. However there was an available PCM update for the engine which was flashed onto my car. I took delivery of my car on 23 April 2013 so it should be included in the affected vehicles.
The PCM update, however, did improve the shifts. Given the current state of UCONNECT updates, I would not be surprised if it was coded wrongly in the system.
Following the update:
- In ECO mode the car is even more subdued - read SLOWER
- In ECO mode, and normal pedal press, the car revs up to 1000 rpm and 7th gear, even when cruising a 30 mph. I do not recall 7th gear at 30 mph before now. A more aggressive acceleration elicits revs up to 2000 rpm and slightly more response.
- In ECO mode, the rough UP and DOWN shifts are gone. This, along with the new behavior of the transmission (gears and revs) makes me think that I did get the tranny flash and not an engine flash (but who knows).
This is the list published by Milous
I was unable to see any 3.6L PCM (Power Control Module) reflash (engine reflash) published at that link.