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Old 02-26-2014, 02:00 PM   #11
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Originally Posted by sdalton View Post
epyndydad: Imressive calculator you have there, and thanks for the info! So if my fully loaded tongue weight is 685 (per your estimate) plus 150 lbs for propane and battery that take the tongue weight to 800 lbs.
Actually, the 685 would include the 150 lbs. for propane and battery since that is part of the camper's total weight. The tongue weight is 14% as designed. I came to that by taking the Dry Hitch Weight (527 lbs.) divided by the Unloaded Vehicle Weight (3,756 lbs.).

The propane and battery get added to that unloaded vehicle weight, as well as any options that were added to the factory order by the dealer and anything that you put into the camper (cooking gear, clothes, linens, etc.). You have a Cargo Carrying Capacity of 1,133 lbs.

If you take the dry weight of the camper (3,756 lbs.) and add all 1,133 lbs. of "stuff" into/on the camper (including propane + batteries) - you can get a ballpark tongue weight figure of 14%. Now, because the propane and batteries are at the front and you also have a storage hatch up there, you may find that the tongue weight percentage increases to 15%. If that's the case, you're looking at a tongue weight of 733 lbs. (15% times 3756 + 1133).

The problem is, you have to make a best guess with this. In my estimate, your tongue weight will likely be anywhere from 650-750 pounds.

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Originally Posted by sdalton View Post
-The payload for my truck is 1280, all passengers weigh in at 380, gas is 128. This leaves 772 for the payload.
If you're referring to the Tire & Loading Information sticker, that already assumes full fluids (e.g. a full fuel tank) in the truck. Don't forget that you also have the weight of the WDH hitch (though, it usually is fairly awash as the hitch transfers some weight back to the camper, but the weight of the hitch itself makes up for most of the shift). Also don't forget that anything you might have added onto the truck (a truck topper, bed cover, nerf bars, boombastic speaker system, etc.) comes off of that payload number. Again with my fancy calculators, see if this one helps:
Towing Calculator by working backwards based on doorjamb sticker
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Old 02-26-2014, 02:00 PM   #12
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you have to add the WDH's weight and anything in the truck bed, into the payload amount.
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Old 02-26-2014, 02:25 PM   #13
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Originally Posted by ependydad View Post
If you take the dry weight of the camper (3,756 lbs.) and add all 1,133 lbs. of "stuff" into/on the camper (including propane + batteries) - you can get a ballpark tongue weight figure of 14%. Now, because the propane and batteries are at the front and you also have a storage hatch up there, you may find that the tongue weight percentage increases to 15%. If that's the case, you're looking at a tongue weight of 733 lbs. (15% times 3756 + 1133).
I would prefer to error on the side of heavy.. worst case senerio. Lets say tongue weight of 733 lbs. Is this dirrectionaly proportial to the trucks tongue limit of 650? Do I simply say "nope, 733 lbs excedes the 650 limit"? Or does the the WD hitch allow me to play with that number?

I guess the question is ..
Can I excede my vehicle tongue weight if I use a weight distribution hitch ( assuming I dont excede the payload limit)

Again.. nice calculator, need to make that thing an APP!
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Old 02-26-2014, 02:47 PM   #14
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Found this on a Toyota site, which only furthers confuses me. I understand that I can not exceede the GVWR (aswell as front and rear GAWR), and I understand what makes up the GVWR. Also I understand I have a limit to the weight applied to the tongue of the TV, and what the weight is comprised of. The water gets muddy when I start thinking about how the WD hitch distributes / applies the weight to the tongue and TV.

"...the WD hitch doesn't help reduce the tongue weight, it just helps to redistribute the tongue weight more evenly between the front and rear axles on the tow vehicle. It would still place the full tongue weight on the truck as "payload."

By moving weight behind the axle on the camper, that reduces the tongue weight load. Then, when using the WD hitch, it is redistributing a lower amount of weight between the two axles on the tow vehicle. "

Is there a mathmatical formula that is used to calculate how the WD distributes the tongue weight? I want to know if I am exceeding my 650 limit.

Sorry for blowing up the thread, ....
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Old 02-26-2014, 02:49 PM   #15
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Usually hitches have 2 markings etched on them - one where it's just a standard setup and another where a WDH hitch is used. See this example pulled from the Googles:



Thanks for the kind words. Making it an app is a future plan- it's already nicely formatted for small screens; just need to get the app side of the house written.
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Old 02-28-2014, 05:14 PM   #16
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That TW (original post) looks high to me, compared to the 3700 lbs dry weight.
Are you sure that TW isn't the max/limit?
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