Your truck has several weight limits, and you will reach one limit before the others. That one becomes the limiting factor.
The weight distribution hitch will shift some weight from the rear axle to the front truck axle and to the trailer axle.
Gross Combined Vehicle Weight Rating GCVWR
: The maximum total combined weight of the tow vehicle and the trailer.
Your tow rating of 9800 lbs. = GCVWR - truck weight.
Gross Vehicle Weight Rating GVWR
= Maximum weight of truck and all contents.
Payload = maximum weight of all passengers and cargo = GVWR - truck weight
This is on the yellow highlighted sticker on the door jamb area.
Then there is a limit on each truck axle.
Gross Axle Weight Rating GAWR
Neither axle limit should be exceeded, as well as the total truck weight rating limit GVWR
. Ford says to measure the height of the front fender before hitching up and then after hitching up. Then adjust the weight distribution hitch to bring the front fender HALF WAY back to the unloaded height.
After you do all that, then head for the scales to see if all the weights are within the limits.