[linux3]

OK, just sitting here looking at the numbers.
My TV is over 2 feet longer and believe me size matters. I would not tow this TT with my Silverado double cab truck, I think you are in the 2500 / 250 range.
My TT is smaller and lighter and I started out with a Ford Explorer Sport with the EcoBoost 3.5 as a tow vehicle.
The Explorer just didn't have enough size to control the TT in cross winds or semi's passing. The SPEC's said I was good but.....
To make life simple, if the size of the TT is over 25 feet (box size) IMHO you need a 2500 / 250.
My little yellow sticker says I can carry 1700 lbs and I can pull 9700 lbs and all that is bull.
If you are looking at more than 2/3 of your rating it's time to buy a smaller TT or a bigger truck.
Remember, your Expedition has an independent rear suspension, great for a nice ride, not good for towing.
I am not a truck guy and I really looked into a Tahoe or Expedition and they just are not good tow systems.