That pin weight will go down actually once you add more passengers, full tank fuel and gear to the truck...
This, I don't understand. The trailer weight is not affected by what is done to the truck.
What do you mean you dont understand?
if you weighed the truck with just you and 1/4 tank of gas and you got a weight of 3180///
Now add full tank of fuel 3 more passengers and gear.. That may be up to say 700 lbs or more..
so lets say 700 lns added to truck.
3180 scale weight plus 700 = 3880 minus 6200 grar = 2320. Thats your new pin weight without going over your axle rating..