I have a 2011 Ecoboost Max trail package and tow a 7,000 pound trailer. While that is not a real heavy trailer. I have towed it out of Hill City South Dakota and from Nebraska to Idaho over the highest mountain on I-80 at Laramie, Wyo also coming down Wahsatch. It handles quite well. You have an option with the trans which to lock out a gear or when you brake coming down a hill "in tow mode" the trans automatically shifts down a gear until you push the accelerator again. Its about the trans not the engine. Ford planned for it to tow. Uphill for the motor and downhill for the trans. Cap that off with a correct gain of 6 on the trailer brakes and never an issue
2011 KZ Spree 310 RLS 6700lbs
2011 Ford XLT Supercrew Bronze V-6 Ecoboost Max trailer package. 2600
payload and 11,200 tow capacity. 6 1/2 foot bed with factory trailer brake, trailer sway control, rear camera.
Nickname Truck (Therma) Trailer (Louise)