You can look up your build sheet here and it will tell you what gears you have. Just put your VIN at the end of the URL.
You will be just fine towing with 3.21. I tow my 24', 6500# boat with no problems.
Doesn't seem relevant:
"Attorneys have reason to suspect that Fiat Chrysler failed to properly flush the casting sand out of the engine blocks on some of its cars when they were made. It is believed that, as a result, the residual sand can circulate throughout the cooling system and settle as a...
While towing my boat (~7000lb) I have no problem with acceleration in steep grades, just be sure to turn on the tow/haul mode so the truck stays in the lower gears longer. Towing will push the engine and run temp hotter, but 220 should be within normal range. As long as the fan is running when...
Yes, I have had this happen 3 times in 17 months of ownership. I think it has to do with the tire pressure monitor, as this is the screen that displays when the horn honks and the hazards flash. Not 100% on this though.