Towing capacity- 2005 Town & Country, TF cooling question

The minivan tow pkg includes, HD radiator, trans cooler, engine oil cooler, rear load leveling shocks, rear sway bar and 4-way trailer wiring. and I haven`t verified it, but when I was with Chrysler I was told that the computer has a different calibration for a tow pkg. slightly firmer shifts and the fan comes on a bit sooner for better cooling. The older minivans used to have bigger wheel bearings and bigger or different brakes!