Based on the info on the window sticker it says 3.55? I bought what they called the Tow and go package with 5.4 trident, 4x4 , hitch, factory wired for brake controller (not supplied) and trans cooler. I had called an RV dealer and he told me that the tow capacity was 8200# for this model truck? As far as sway control unless its part of the weight distribution system I dont have one. The tires are 17". Where did you get the 10,000# number from? I dont pick up the Trailer and weight distribution system untill next wensday. Gonna be out of town until then.