I just towed 6000lbs (max rated load for a supercab, supercrew is 8000lbs) with a 2011 supercab and it does just fine. It does allow a bit of sway but the trailer was only 16ft so an 18 footer would probably tow better. The Raptor has plenty of power and torque to pull this load, but the suspension is soft and you do notice it. I pull the same load with my f450 last summer. With the 450 you didn't even fell the trailer but the ride is very harsh. With the raptor you fell the load but the ride is very very nice.