hvac
you are correct, the rating is a durability rating. Hence, GCWR, the W should be warranty not weight rating!
For everyone's perusal the
page to how the J2807 tow ratings are done, what is the minimum to meet the spec. For full size trucks, it is 80 sq ft of frontal area. The spec does not give a reduction is lbs or equal, for those toting the larger 5w's that are in the 100-120 sq ft relm. Nor is there a reduction for when you have wider tires, traction vs hwy ribs, taller tires etc than tested.
I can rattle off a number of past ratings that were reduced due to stock taller tires, mid 90s Ford did have a poster out for reductions over 80 and 100 sq ft. over 100 was a reduction in half of the max rating at the time. 10K down to 5K lbs. Over 120 sq ft was not recommended towing by your F series truck.
GM 454SS, max tow 6000 lbs, despite the 4.10 gears, 4l80E trans, it was a sport truck, rwd, short WB box truck!
My wifes model 2001 MB ML320, ALL of these were rated to 5000 lbs max tow rating in owners manual. With a caveat, if you want BEST performance, do not buy the 200/200 hp torque 320 like we have, get the 400/400+ turbo M55 V8! ALL will safely pull a 5000 lbs trailer, assuming setup correctly! That is the best tow rating I have seen frankly!
No reduction if you want to go up a steeper grade than speced. NO REDUCTIONS for a lot of things that might include how you tow! or what you tow.
As Ive said many times. I do not tow just an RV trailer. equipment trailers, single axel box trailers. Granted ALL ball or pintle hitched, some of you also add in a gooseneck or 5w style, along with ball mount trailers. SO yes, the ratings are a basic hopefully everyone will be ok, warranty is not over exposed to the manufacture etc.
Marty
