How much weight, or how would I find/figure out how much I can carry in the bed of my 04 fx4 screw?

 

Not sure if this is what you are looking for but on the B pillar or on the drivers door, there will be a sticker that says the combined weight of occupants and cargo should not exceed a certain number of pounds. Hope this helps.

 

If thats not what you are looking for, look in your owners manual in the chapter labeled tires, wheels and loading.

 

What is the configuration (i.e - gear ration, wheelbase, and engine)

Payload: Combined maximum allowable weight of cargo, occupants
and optional equipment. The payload equals the gross vehicle weight
rating minus base curb weight.

Base Curb Weight: Weight of the vehicle including any standard
equipment, fluids, lubricants, etc. It does not include occupants or
aftermarket equipment.

Look at the door sticket and you will find your gvwr.

To find your Base Curb Weight, get the weight of the vehilce.