JIMNLIN wrote:
A F150 4wd 5.0 3.55 with a 7350 gvwr has those small 3850 rawr. Rawr will be carrying all the load in the bed. Your Fi50 rear axle may weigh in the 2400-2500 lb range from the factory which leaves it with around 1300-1400 lb in the bed payload before exceeding its 3850 lb rawr.
Rawr = the lessor of wheels/P tires/rear axle and suspension.
The problem with the payload placard number is its a GVWR based payload and as many truck owners have found out when all that number is placed in the bed it may overload the trucks rear axle/tires/wheels and rear suspension.
With any truck its best to weigh front and rear axles separately. That way you know how much in the bed payload the truck can safely handle.
Sounds like a 6.5k dry hitch weight = a 6500 lb dry trailer weight and add a 5k CCC = a 10k GVWR + trailer.
Not enough truck if thats the case.
A 10,000 lbs trailer is still only 1,000 lbs of payload using 10% as you did in your calculation. Fact is. OP has not given any indication of how much of that Cargo Weight he plans to use.