I have a 99 f150 4x4 witht eh 5.4/ no tow package but intake, throttle body and edge chip with 33" tirers. Today I think I found the max weight my truck can pull with. Picked up a GEHL CTL60 track loader. weighd in at around 7500lbs. I'm not sure what the trailor weighd in at but should be around 1/2-1ton considering it was dual axle with a max axle weight at around 15000lbs. Also add me and two friends which is around another 600lbs. I'm guessing that total was around 4 1/2 tons. Truck pulled great but you could def. tell she was have a hard time but hell its on a 150 and not made for this kind of weight.

 

What do you want to hear about it.
If I put 3 or 4 100 lb bags of sand on your back, how far do you think you would get?
It dosn't do anything to impress in a positive way, if you know what I mean.

 

Depends on what you are dong with that weight. by the way that trailer was at least a ton empty, maybe more. I hauled a 12' dumptrailer recently and that was 2400 pounds empty. Added 3.5 tons for several loads and the truck pulled just fine at 65mph. But I was not going cross country and through mountains.