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Open Roads Forum  >  Fifth-Wheels

 > F250 Short Bed Adding Diesel Auxiliary Tank

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chris3403

Jeffersonville, In

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Posted: 07/20/21 08:48am Link  |  Quote  |  Print  |  Notify Moderator

I'm interested in adding an Auxiliary Tank to my short bed F250 and wondering what the largest tank you've installed without running into turning issues with the 5th wheel.
Thanks

* This post was edited 07/20/21 09:00am by chris3403 *

M.R.E.

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Posted: 07/20/21 09:10am Link  |  Quote  |  Print  |  Notify Moderator

I have a Ram 2500 CTD crewcab short bed. I put in a Better Built transfer tank that I bought on Amazon from Northern Tool. I bought there because I wanted a black one. You can get a white one from Tractor Supply. It is 36 gallons and is 42 1/4 wide x 17" high x 11" deep. I use a 6' siphon hose 3/4 ID. It works great . You don't need a transfer pump. It takes little room and fits under my cover. I have it secured with 2 heavy duty ratchet straps, holds it great. That way I can take it out if I need the room to carry anything.


toolmaker

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Posted: 07/20/21 09:20am Link  |  Quote  |  Print  |  Notify Moderator

The issue with adding additional fuel is weight and the weight limits of the truck. A 3/4 ton truck has a limited load capacity and the added fuel. Diesel fuel weighs about 7.2 to 7.5 LB/Gal. 40 gallons of diesel will add 300# plus the weight of the tank to the truck and reduce the payload capacity by the same amount.

Most 3/4 ton trucks with 5th wheels are nearing their rated load capacities without added fuel. Make sure that you will still be within your trucks ratings with the added weight.

Adding a tank with added capacity will not effect turning at all if you get a tank that sets below the bed rails.

Ken


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MNRon

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Posted: 07/20/21 09:21am Link  |  Quote  |  Print  |  Notify Moderator

With a F250 you might want to look at rear axle weights before adding an aux tank. Unless you have a very light 5er, the pin weight already might be getting near RAWR. A transfer tank would add a few hundred more lbs…


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2oldman

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Posted: 07/20/21 09:49am Link  |  Quote  |  Print  |  Notify Moderator

50 gal, but I did have to be careful on tight turns. A short wheelbase means the hitch is closer to the back of the cab, where the tank, presumably, will be.

MarkTwain

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Posted: 07/20/21 11:24am Link  |  Quote  |  Print  |  Notify Moderator

chris3403 wrote:

I'm interested in adding an Auxiliary Tank to my short bed F250 and wondering what the largest tank you've installed without running into turning issues with the 5th wheel.
Thanks


Call Transfer Flow Company in Chico , Calif. for all your questions. They have installed 62 gal. auxiliary diesel tanks in 3 different Dodge trucks. Never had a problem. they can install the tanks in 1 day.

laknox

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Posted: 07/20/21 12:01pm Link  |  Quote  |  Print  |  Notify Moderator

There are also OEM tank replacements available that are under bed. On a short bed, you can go from about 25 gallons to ~46 gallons, IIRC. Again, you do have to watch payload weights.

Lyle


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fj12ryder

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Posted: 07/20/21 12:26pm Link  |  Quote  |  Print  |  Notify Moderator

I installed a 36 gallon auxiliary fuel tank in my long bed Ram, but it sits below the bed rails, and is only about 6 inches long, so it certainly wouldn't affect the turning radius of a short bed.


Howard and Peggy

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thomas201

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Posted: 07/21/21 05:15am Link  |  Quote  |  Print  |  Notify Moderator

I put a 41 gallon tank in my 2012 short bed F250. The filler neck is just above the rails. I have over a foot between the 5th wheel and the tank, just in case I ride the pin over the 5th wheel. My 5er is light on the pin and I am still about 300 pounds under on weight. My tank is offset all the way to the passenger side, to haul a 2 person kayak when not towing.

Now I can drive all day, and only have to fuel once. Cured my range worries.

laknox

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Posted: 07/22/21 10:26am Link  |  Quote  |  Print  |  Notify Moderator

thomas201 wrote:

I put a 41 gallon tank in my 2012 short bed F250. The filler neck is just above the rails. I have over a foot between the 5th wheel and the tank, just in case I ride the pin over the 5th wheel. My 5er is light on the pin and I am still about 300 pounds under on weight. My tank is offset all the way to the passenger side, to haul a 2 person kayak when not towing.

Now I can drive all day, and only have to fuel once. Cured my range worries.


I can drive all day, too, but, at a certain age, you just gotta stop and pee. :-) Might was well top up at the same time. I just plan my trips so that I don't have to be in a hurry. I also carry a 5 gal fuel can for just-in-case, but there are times that I actually =plan= on using it to stretch me out a bit.

Lyle

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