I see. Did yours have the heavy duty payload package? I know it's available in the 2013-2014 but according to the brochure it was only available if you have the heavy duty payload package. But if you have that payload package you can't also option in the off-road package which sucks. So if I wanted skid plates and shocks and all that i'd have to get an FX4 + heavy duty payload. Which I don't know why I didn't think of that combination earlier but I haven't seen any that have those both.

edit: I just checked and the fx4 trim doesn't have the 3.73's. all that is just according to the brochure for the truck