Modifications don't void warranties unless it can be shown that the modification directly lead to or contributed to a failure.

There is no liability associated with adding air bags, helper springs, heavy duty shocks, etc. GVWR is not necessarily the measure of a truck's capability. It is about determining vehicle classification and licensing/registration requirements. That is why you can elect to have the GVWR of a truck arbitrarily lowered by the manufacturer. It is only about lowering fees. The truck is no less capable. I have also seen it stated that there are states that will allow you to register a truck for more or less than the stated GVWR. Once again, it is a fee shell game.

The obvious answer to the OP's question is, yes. It is quite easy and cheap to raise the payload capability of a truck. Using my F250 as an example (it's equipped with the F350 Dana axle), If I swapped out my rear leaf springs for a set from an F350, it is inarguable that my truck would be exactly as capable as an F350. At that point, it would be mechanically identical. Of course, my stated (sticker) payload capacity would remain unchanged because once assigned by the manufacturer, the GVWR is a fixed number.

 

For shiats yesterday, i stopped at a trailer sales place. Wanted to show someone a few 5vers to compare the difference of what i have and eventually, what i want to get. Ofcourse, couldnt get out of the truck before a salesman was right there. Anyeho, long story short, i mentioned, because of having an l99 f350/7.3, that max gcwr was 20k. But, pin weight i have very little to work with. He proceeded to say, if i had airbags, that it ups the payload by 1200#...without getn into a pissing match, i told him i have a CDL and im going by what FORD stamped on my sticker...he also mentioned that, they weigh everything before leaving lot so that the new purchase was legal for the buyer. I asked wheres the scale lol

 

Beats me. I'm just saying what I heard. Sure, it's anecdotal, and maybe it was a mistake on the part of the DMV to allow that. It still doesn't change the sticker on the truck.

 

This article here says the newer F-250's and F-350's SRW are equipped with the same front and rear axles Dana 60
https://www.cjponyparts.com/resources/f250-vs-f350

 

That article is completely wrong about the axles. Dana 60 up front for all Super Duties. F250 gets the same Sterlibg 10.5 that has been used in F250/F350 for years. F350 and F250 with the high capacity tow package get a Dana M275.

 

I think we miss each others points.
There are things you can add in after market stuff that will not void your warranty, and there are things that definitely will. That is all parts that impact motor management, drive system, maybe gears, or if you start messing around with your frame.

Lowering GVWR on paper doesn't change the built of your car and has nothing to do with liability.

If you swap out the parts of your F250 and install the parts of a F350, then, of course, you will have the capacity of a F350, no doubt about that. But I can't see how this will save you money as those parts cost money and labor if you can't do it yourself.

I agree that F250 exist for folks that don't need the higher GVWR and want to avoid the higher fees, even though the differences are not as big as one might think they are considering the initial expense of buying such a truck. Buying a nicely outfitted new truck, you're going to dole out $65k and you're fretting over a couple of more bucks a year in fees?

If I want to go fast and stay safe, I better get a sportscar and not a Honda Civic and try to boost it with cheap aftermarket stuff. If I want to haul a big rig, I better get the truck equipped for the task. Or I scale my rig down, then a F250 will do without any fuss.

 

One thing the previous writer did not mention and is really the point, if you swap out the parts of your F250 and install the parts of the F350 after Ford has delivered it to you, not only do you pay the costs of the changes, the legal sticker (GVW or GCVW) in the door jam does not change. While you can argue to yourself that you have a more capable truck and can pull more weight or take more payload, legally you cannot. I think that is what you really are asking. As an owner of your truck, you can do any modification, and these mods may make it more capable (or not), the legal numbers of your truck does not change. Any build option from Ford will come with a different legal GVW because Ford has certified it. And when you are either building/ordering or buying off the lot, there is some difference of the GVW and you should look carefully, because once you take delivery of it, the GVW does not change ever.

 

You mean GVWR with R as in rating. GVW is the actual weight, which may not exceed GVWR.

 

I stand corrected. LOL. One more thing. I strongly believe in doing your homework in choosing the right truck from FORD (or anyone else). What options, differences, the towing and payload capacity, etc. It should be the right truck for your existing trailer or the trailer you are ordering. That way, you have purchased the right combo that works. If you are modifying your truck to increase your capacity, in my opinion this is the wrong way to solve the problem. You may mod your truck to make your truck easier to tow by air bags etc, but always within your original capacity. Another thought is that you might want to buy more truck than you need because many people decide after a season or two to go with a bigger trailer and having that flexibility is nice.

 

Excellent post. If the truck is licensed for say 8,000 lbs GVW, and you want more, it simply costs a bit more for the 10,000 GVW, been there done that.
Its not a change on a title, its the paper for the new license tag. And in the old days they used to have to post GVW on the side of the beds of pickups just like the big trucks.