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Thanks for spending the time for research this and post the results.
Way back when, Ford used the Davis Dam highway to verify the GCWR of the '99-up SuperDuty pickups. Basically their test required no overheating of anything in the drivetrain and no falling off of speed to less than the standard when towing at the GCWR. When I read the SAE specs, I thought the Ford member of the SAE team must have had a lot of input to the specs.
makes sense. And aligns pretty well with the ratings.
I made a spreadsheet several months ago that tells me what weight trailer I can tow and whether it exceeds any of the ratings. And indeed, the GCWR - lightly loaded truck equals pretty close to Fords tow rating.
Hi, My truck is rated to tow 11,200 lbs. of trailer. But I figured it differently. My truck has a GVWR of 7650 lbs. So to be on the safe side, I took the GVWR and subtracted it from the GCWR of 17,100 lbs. and that left me with a maximum tow rating [in my books] of 9,450 lbs. My trailer of 12 years has a GVWR of 6,300 lbs. I'm sure that I never loaded my truck or trailer to their max ratings and I don't plan on changing trailers either. With what I carry, with my 1745 lb. payload, I still have a margin of safety.
09-12-2016, 12:21 PM
Hi, My truck is rated to tow 11,200 lbs. of trailer. But I figured it differently. My truck has a GVWR of 7650 lbs. So to be on the safe side, I took the GVWR and subtracted it from the GCWR of 17,100 lbs. and that left me with a maximum tow rating [in my books] of 9,450 lbs. My trailer of 12 years has a GVWR of 6,300 lbs. I'm sure that I never loaded my truck or trailer to their max ratings and I don't plan on changing trailers either. With what I carry, with my 1745 lb. payload, I still have a margin of safety.