mass-hole

I dont know about your trucks, but my GVWR is less than the sum of the GAWR.

GVWR = 7700 lbs
GFAWR = 3900 lbs
GRAWR = 4050 lbs

3900+4050 = 7950 lbs

So since that is the case, its clearly not a limitation of the axles or tires which are limiting total payload capacity. Not only that but my truck has the same frame as an HD Payload truck since I have a 157" wheelbase.

mass-hole

2011+ is still 1050 for non-Maxtow trucks. Max Tow trucks are 1150.

ragerjr

IMHO it is a marketing thing and that is it. Here is why I say that; the trans are the same, the frames are the same, the brakes are the same, wheels and lugs are the same (Non-HD and Max Tow), and the splines are the same (31 (4x2)/34 (4x4)). All of this is based on MY10 and the conclusion that I am coming up with is based off of the 2010 Sourcebook dated august 2009. I am not saying that I am 100% right just what I have concluded with the information that I can find.


There is clearly a difference between the Non-HD and the HD because of the lugs.


The only other conclusion that I can come up with is that having a 3.73 rear end adds another 500# in GVWR. I can't see how changing the gears would add more GVWR. Moving a larger load easier yes but I would not think that it would do anything else.

ragerjr

Thank you bubbabud for bring this up matter up and your contribution to this thread. Not being a smart... about it either. It is worth mentioning this side of it because we are in a world of people that like to sue.


I am going to make 1 statement on this because I don't want to get into an argument about it.
Warranty wise only the parts that you have changed will it void the warranty and not the whole truck. This is the information that I have received from Ford.
Litigation wise, the same could be said about any changes that you make to a car/truck such as lift/lowering, tires, wheels, or anything else that you have done to change the configuration from the original OEM version. I have never heard anyone ever make this statement about people lifting/lowering their truck. This always seems to come up when anyone is talking about hauling/towing.

mass-hole

Yes but the fact that the GVWR is lower still suggests that something about our non-HD trucks limits the total weight it can handle. It maybe something like how stiff or strong the hubs are.

As far as max tow vs non-max tow, I believe your right. I think the springs are even the same. Maybe they just make you pay to get the higher GVWR so that they can cover any warranty claims from the extra weight you can put on the same components.

ragerjr

Mass-hole, I agree with you and that is a good point about the hubs. I did not think about that.

brulaz

In the 2011-2014 trucks there is no difference specified in rear axle between the 4x2 and 4x4 trucks.

Just the spline diff between 8.8" (31) and 9.75" (34) rear ends.

And this difference corresponds to an axle weight rating of 4000/4800 for the 9.75" versus 3800 for the 8.8" (these are not GAWR which take into account springs and other stuff).

Certainly the HD Payload option trucks (both 4x2 and 4x4) have the 9.75" rear end. And as you've mentioned, the HD Payload option is also different at the wheel end of the axle with more lugs and the 7 lug HD wheels.

Also, my 4x2 EcoBoost 3.5L with MaxTow has the 9.75" rear end (rear GAWR = 4050).

Otherwise, I'm not sure which trucks get the 8.8" versus the 9.75" rear end. Maybe the 8.8" is in the non-MaxTow trucks with the less powerful V6? Not sure what you will have in your 2010 ...

11screw50

Funny thing is, I read that they beefed up the 8.8 for the 2015 trucks and yet I believe the 'official' rating is still 3800.

I think they play a lot of games with ratings because they can always list something with a lower rating if they want to use the rating to push people in a certain direction.

As for litigation, etc. I still think that you could make an argument that if you upgraded all of the parts and could prove that they are the same you might have a chance of winning. Probably would help if you happened to be a mechanical engineer and could discuss it using technical terms.

Then again, lawyers are slimy, you would probably still lose.

ragerjr

Brulaz, I have 9.75 rear end with 3.55 in my truck with rear gawr of 3850.


11screw50, yeah you are probably right.

Velosprout

That might be true for earlier generations, but the 2015 and 2016 have a heavier frame in the HD Payload than the standard 157" truck. That is the holdup that made few '15 HD payload trucks and is making them late availability for 2016. While the frame dimensions are the same, the thickness of the steel from which they are made thicker. As a result, no amount of upgrades will make a standard truck a Heavy Duty Payload capable truck.