This is a quote from GTYANKEE:
"go to this website & follow all the prompts for your vehicle
look at the tire sizes & other things too, when you get to the load, trailer towing part
like in my '09 ram 1500, i can put only 1570
pounds in the empty truck, that is counting people, beer, cameras, etc
then i can put 6,700 pounds on the trailer hitch, that is everything, empty trailer, beer coolers, empty cans "
In my 2010 with the 3.55 gears as equiped I can only put 1300 pounds in the empty truck.
Sounds like an overloaded situation you had before.