This must be where the discrepancy happens with GCWR when you subtract the trailer weight and come up with a number that isn't much more than the curb weight of the truck. 17,900-12,800=5100. This is for a 4x2 Screw Max Tow 145" WB which has a 6750 GVWR. It would have to have at minimum 1800 pounds of payload.

 

Help me out here. I think I misread that towing chart. I thought my truck had a GCWR of 16,100 lbs which seemed a bit low. However, after reading more, and looking at the chart again, I think I did not take into account the Max tow package and the 20 " wheels.

All of my truck specs: 2018 F-150 Lariat, Super Crew, 145" wheelbase, 4x4, 3.5L Eco engine, 3.55 L9 rear axle, Max Tow (7000 lb GVWR), 20" wheels, Payload 1600 lbs.
With those specs, the chart seems to point to my actual GCWR being 18,100 with the theoretical ability to tow a trailer weighing 12,700 lbs. Am I correct?

Now before the weight police start yelling, I have absolutely no plans to tow anything anywhere near that weight!

According to this site :http://changingears.com/rv-sec-calc-...eight-tt.shtml The max trailer weight I should tow, with a 20% safety margin, would be 8123 lbs.

Here are the values I used. I guessed at the curb weight and used 5400 lbs. I know! Nothing is in stone until I actually weigh the truck!
I also used the trailer weights from a Grand Design Transcend 27BHS, the camper I am wanting to eventually buy once I get all this other stuff figured out.

 

Screw or Scab, 145" or 156" wheel base? 2WD or 4WD?

 

4x4 SuperCrew 145" wheelbase

 

Yep, 18,100 with a 12,700 trailer limit. Subtract the trailer limit from the GCWR, see how much truck weight is left.