schmenke

No. The indicated payload capacity takes into account the weight of a full fuel tank.

Velosprout

But, all things being equal, a truck with the 36 gallon fuel tank will have 83 pounds lower rated payload. See my link above to the Ford weight of all options.

schmenke

Yes, that's what I meant (probably just didn't express it correctly).

Feathermerchant

Payload is probably always limited by the 'weakest link' whether frame, axle, wheels, tires, etc. I think it is interesting that ALL the trucks of my gen have the same brakes given the spread of GVW. My GVW is 8,200lb. The only difference I know is the HDPP trucks have seven holes in the rotors. The rest have 6.

11screw50

Frame wall thickness varies (there are two thicknesses) depending on the configuration on at least the current and last gen F150's. The pdf that Velosprout linked contains this information.

As for brakes, so far as I know, all configurations of F150's have the same brakes so while they might be the limiting factor in an HD payload SCrew, they should not be the limiting factor in any other configuration.

brown1

what i think I've learned so far...
1)upgrading springs and or brakes "legally" does nothing for payload
2)auto manufacturers seem to grossly over sell "towing capacity" on their 1/2ton trucks as there is no way to achieve said tow rating and stay under payload without magic.
3)my TT is too big for my truck or my truck is too small for my TT. should have went to a peterbuilt dealer i guess, i wonder if they offer seating for 5?
4)while i understand why ford's engineers and lawyers say my aftermarket add ons do nothing to increase my payload i do feel a little more comfortable knowing they are there.

Velosprout

Correct



No, this is not correct. In rural areas, many trucks are used to pull silage wagons, hay wagons, anhydrous wagons, etc. These have four wheels (hence they are called wagons instead of trailers). All of the weight of the trailer and cargo are on the running gear of the wagon, and the tongue of the wagon is attached to the truck hitch, weighing at most about 100 pounds. The towing capacity is correct in reflecting the maximum amount of wagon weight that can be towed. These wagons only use up about 100 pounds of payload, so you can max towing capacity before payload.



I'm sorry I don't see what kind of trailer you have, but yes, wise buyers do all of their research in advance and get enough truck for the job.




I feel better knowing if I have a lucky rabbit foot or 4-leaf clover keychain. But these have as much effect on payload as aftermarket gadgets. No aftermarket accessories can make a thicker steel frame or, increase wheelbase, and by the time one upgrades transmission oil cooler, stronger wheels, changes out the gear ratio, adds smaller 17 or 18 inch tires with load rated E tires, has the spring packs rebuilt stronger, added heavier shocks, and swapped to a 3.5 EcoBoost or 5.0, and removed unnecessary and weighty components, it would have been cheaper to buy the right truck or trailer in the first place.

zx12-iowa

I think his point is identifying a likely weaker component and beefing it up increases the trucks strength and ability to haul even if the sticker doesn't change. So yes one can increase the Trucks payload with modifications just like on can modify a truck to be faster, brake better,etc.

Velosprout

That may be his goal, but to really increase payload, you need to make a standard truck emulate the heavy-duty payload truck. That would include increasing the wheelbase if one has a short-bed, swapping motors if one has a naturally aspirated 3.5 or a 2.7 EcoBoost, and swapping out the frame for a heaver frame. That is theoretically possible, but an impractical and foolish endeavor in comparison to just trading for a well-endowed truck.

Look at the following Ford specifications: http://www.ford.com/trucks/f150/specifications/payload/

Using, for example, the standard cab long-bed pickup truck, the maximum payload for a non-heavy duty payload 4x4 truck is max 2360 pounds. The HDPP truck for the same build is max 2800 or 3010 (depending on wheel size). That means that somewhere between the 2360 and the 2800 the stronger frame is required in order to increase payload. In all instances, swapping out a frame is an impractical endeavor (ask first-generation Tundra frame-rust recall owners).

Since the beefier, thicker HDPP frame is available only on long-bed singlecabs, long-bed supercrews, and long-bed supercabs, the wheelbase of many trucks would have to be extended as well as swapping out frames in order to truly increase payload. That would require a new truck bed, extended wiring, new fuel lines, brake lines, drive shafts, etc.

So, again, the best and perhaps only sane way to increase payload is to trade trucks.

brown1

so if we exclude hdpp trucks is it safe to say that every 154" wheelbase truck with an ecoboost for example has a payload numer with just frame and drivetrain only? then every item bolted to givin truck is taking away from the starting payload number?