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Old 09-08-2015, 04:23 PM   #1
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Towing info?

I have a 2015 ford f350 super duty 4x4 .Anyone have weight limit that I can look at in a fifth wheel.The axle ratio is 3.55,with a 6.7 V8 diesel.The manufacturer says GVWR is 11300#.Thanks
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Old 09-08-2015, 05:02 PM   #2
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Would help to know a few more numbers;

GAWR (rear) - information on door pillar
GCWR

Take the truck and weigh it with full fuel, DW, kids, dog, and anything you would likely carry in the back including fuel tank, tool box, etc. Get the rear axle weight and the front axle weight. The two weights is the wet weight of the truck.

Subtract that from the GVWR of the truck to see how much more load you can carry.

Take the difference of the weight of the rear axle and subtract it from the GAWR (rear) number on the placard. Subtract another 150 lbs for a 5 wheel hitch. This will give you the maximum pin weight you should load on the truck unless the GVWR is exceeded.

Take the maximum pin weight you calculated and add it to the wet weight of the truck. If that number is greater than the GVWR you should reduce the number so the GVWR is not exceeded.

Take the smaller number of the two calculations above and divide it by .20 and .25. This will be an approximate number range of the GVWR of the 5 wheel you should consider.

Add the number you calculated for the GVWR of the trailer and the loaded weight of the truck. If this is less than the GCWR of the truck you will be OK.

These are approximate numbers only. The best numbers are actual weights.
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Old 09-08-2015, 07:36 PM   #3
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Quote:
Originally Posted by Jpdkmd View Post
I have a 2015 ford f350 super duty 4x4 ...The axle ratio is 3.55,with a 6.7 V8 diesel.The manufacturer says GVWR is 11300#.
I suspect you have a typo and your GVWR is 11,200. If so you have an F-350 SRW with GVWR of 11,200# and GCWR of 23,500#.

Quote:
Anyone have weight limit that I can look at in a fifth wheel.
To get a decent estimate, you have to

1] load the truck with everyone and everything that will be in it when towing, go to a truck stop that has a certified automated truck (CAT) scale, fill up with diesel, then weigh the wet and loaded F-350. If you don't have your 5er hitch yet, then add 150 pounds to the scale weight of the wet and loaded truck.

2] Subtract the weight of the wet and loaded truck from the GVWR of the truck. The answer is the maximum kingpin weight - also called "pin" weight or hitch weight - you can have on the 5er hitch without being overloaded.

3] Divide that max pin weight by 0.20 to estimate the maximum GVWR of any 5er you want to consider.

Example: Your wet and loaded F-350, with family, pet(s), toolbox full of tools, some campfire wood and miscellaneous junk in he truck, and with the 5er hitch installed weighs 8,500 pounds. GVWR is 11,200, minus 8,500, = 2,700 pounds max pin weight. 2,700 max pin weight divided by 0.20 = 13,500 max 5er GVWR.


After you go through the exercise above, then double-check to be sure you won't exceed the GCWR of your tow vehicle. GCWR = 23,500 minus 8,500 truck minus 13,500 trailer = 1,500 pounds under your GCWR. So you're good to go with a trailer that grosses 13,500 pounds - PROVIDED your wet and loaded F-350 weighs 8,500 pounds or less.

Caveat: Most 5ers with GVWR of 13,500 or less will have pin weight about 20% or a bit less. But some "luxury" 5ers have pin weight of up to 25% of the gross weight of the trailer.

Don't worry about axle weight ratings. Your Ford has plenty of axle weight capacity to support any pin weight that does not cause you to exceed the GVWR of your truck. You cannot say that about some other brands of trucks.

On edit: Since your truck is a 4x4, a more realistic weight of the wet and loaded truck s 9,000 pounds. 11.200 GVWR minus 9,000 truck weight = 2200 max pin weight. 2200 divided by 0.20 = 11,000 max GVWR of any 5er you want to tie onto if you don't want to be overloaded.

So it makes a big difference as to how much weight you haul in the truck. A 500 pound difference in weight of the truck's people and cargo is a 2,500 pound difference in the max GVWR of the trailer you can tow without being overloaded.
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Old 09-09-2015, 03:40 PM   #4
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WOW 9000lbs? Those new diesels must be heavy. My old F250 loaded to camp is 7665lbs.
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Old 09-09-2015, 07:07 PM   #5
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F350 tow vehicle

I checked the GVWR and it is 11,300.The data plate on the driver side panel says not to exceed 3300 lbs. for passengers and cargo.I'm assuming that if you take the 11,300 # GVWR subtract the 3300lbs.the truck weight is 8,000#.We like the Grand Design Solitude 325x which list the GVWR at 15,000 #.I spoke with Ford and they weren't much help.They said you can tow up to 15,700# with the 350srw.The way I see it is with a tow vehicle weight of around 8800# that only leaves 14,400 # for the weight of the 5th wheel.Looks like anything over 12,000# requires a DRW.
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Old 09-09-2015, 09:42 PM   #6
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WOW 9000lbs? Those new diesels must be heavy. My old F250 loaded to camp is 7665lbs.
My '99.5 F-250 CrewCab longbed PSD 4x2 grossed about 8,000 before tying onto the 5er. 2005-up is several hundred pounds heavier (with more GVWR and GCWR), and 4x4 weighs about 400 pounds more than 4x2. So if he hauls the same tools, jacks, bedliner, cab steps, passengers and pets I hauled, then his truck is going to gross about 8,700 to 9,000 before he drops the pin weight onto the hitch.

But notice that was in the example weights. Before that I advised him to weigh the wet and loaded truck to get the weight of HIS truck. Then no guessing needed.
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Old 09-09-2015, 10:02 PM   #7
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I spoke with Ford and they weren't much help.They said you can tow up to 15,700# with the 350srw.
They lied, or at least were misleading. The F-250 SRW diesel can tow 15,700 ONLY if the wet and loaded truck weighs 7,800 pounds or less (including hitch, tools, passengers, pets, campfire wood, and full tank of diesel) without exceeding the GCWR of the truck.

But on your SRW with GVWR of 11,300 pounds, that GVWR will probably be exceeded well before you reach 15,700 pounds trailer weight.
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Old 09-09-2015, 10:34 PM   #8
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Another big factor here is exactly you want to follow all of these numbers. I know it isn't smart to over look the numbers, but If I was looking at trailers and loved one that put me over the GCWR by 1,000lbs I wouldn't even bat an eye at it. Same with pin weight, as long as I am not overloading the tires ill haul well over the specified axle weight rating.

GVWR and axle weight ratings are pretty low in comparison to what modern trucks will do relatively safely with some brains behind the wheel. An example of this is my Ford Ranger. I constantly towed trailers and loaded the truck up, a few times I knew I was well over weight but I only did that for a few local, low speed trips. I never weighed those loads but ill just say I was well over double what the rated tow rating was. it wasn't smart, but no one died. the only time I weighed a load I was extremely shocked to find out I was actually over weight with just scrap metal in the bed. The truck hardly squatted at all and drove PERFECTLY fine but on the scales I was something like 300lbs over weight with no one in the truck.
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Old 09-10-2015, 12:55 AM   #9
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Hitch weight on Solitude

I checked the hitch weight of the Solitude and it is 2480# according to Grand Design.So looking at 8800# for the Tv and the hitch weight it puts us at the max GVWR of 11,280#.So it looks like that only leaves about 12,000# for a fifth wheel.
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Old 09-10-2015, 07:59 AM   #10
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Don't forget that the hitch weight is included in the GVWR of the 5th wheel.
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Old 09-10-2015, 11:28 AM   #11
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Quote:
Originally Posted by Jpdkmd View Post
I checked the hitch weight of the Solitude and it is 2480# according to Grand Design.So looking at 8800# for the Tv and the hitch weight it puts us at the max GVWR of 11,280#.So it looks like that only leaves about 12,000# for a fifth wheel.
That is the hitch weight of a dry bare trailer. There are no accessories such as generator, extra slide if it is an option, water, etc.

Dont forget DW will fill every spot that is available during the course of your ownership. There will be bedding, clothes, cutlery, dishes, food, etc which will all add to the pin weight.
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Old 09-10-2015, 11:53 AM   #12
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The Ford Towing Guide should answer your questions.

RV & Trailer Towing Guides | fleet.ford.com
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Old 09-10-2015, 01:38 PM   #13
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My '99 F-350 DW 4x4 scales at 8660lbs- with just me in the seat. Smokey's statement of 9000 lbs is spot on.
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Old 09-10-2015, 01:41 PM   #14
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on edit- I have a 13,000+ 5th wheel and I am over GCWR.
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