Transfer Flow Extended Range Fuel Tanks For The Tundra

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There are times when your work or leisure activities might take you a fair distance away from the closest gas station. If you find yourself frequently exploring off-road trails, working on a large farm property or making long-distance drives through isolated areas, then you are probably all too familiar with that sinking feeling in the pit of your stomach as you nervously eye the fuel gauge nearing empty. While it is always a good idea to carefully plan fuel stops along a long drive, not every eventuality can be planned for, and this can introduce a degree of uncertainty when it comes to fuel consumption.

Extend the range of your truck with a bigger fuel tank.

Extend the range of your truck with a bigger fuel tank.

Fortunately, there are a few options available to extend the range of your Toyota Tundra. The first is a unique accessory from Transfer Flow that serves as both a backup fuel tank and a tool box. Designed to install in the bed of your truck, the combo tank / tool box offers an additional 30 gallons of gasoline storage as well as room for your tools. The tool box is made of 14 gauge steel and of course locks to protect your equipment. The filling point for the tank is also kept inside the locked compartment to prevent others from siphoning off your fuel while your vehicle is parked overnight.

Combination fuel tank tool box for the Toyota Tundra.

Combination fuel tank tool box for the Toyota Tundra.

What is perhaps most appealing about the Transfer Flow tank / box is that it makes use of a special software-controlled fuel management system that automatically engages the fuel pump in the unit once the stock tank on your truck hits the halfway mark. Instead of drawing fuel directly from the auxiliary tank to the engine, the tank’s contents are transferred to your standard fuel tank in order to replenish to the ¾ level. This eliminates the need to fumble under the seat for a switch to flip and engage the extra tank as was the case with so many old fashioned factory setups.

For those who are not interested in crowding the cargo area of their Tundra with an extra tank, Transfer Flow also offers a direct factory replacement tank that swaps out the stock 26 gallon tank for a much larger 47 gallon unit. While not quite as range-extending as the additional 30 gallon in-bed device, the installation of the still large tank offers an impressive volume of extra gasoline to ease your mind on extra-long journeys. The tank is crafted from aluminized steel and is specifically intended to resist corrosion as well as or better than the Toyota tank. The hardware inside the stock tank is re-used, and the larger unit comes with its own installation kit that includes all the necessary mounting pieces.

Each of these tanks offers excellent range and a quality design, and the versatility that they provide for the Tundra helps to add an extra dimension to your driving – whether it is primarily eating up highway miles or munching down the dirt and mud far away from home. The extra fuel you can pack with these products means it’s a lot harder to get stranded because you ran out of gas.

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  1. Rick says:

    I wonder how the computer manages the extra capacity, does it work with a fuel tank like this?

  2. Rick – Good damn question. I’m going to find out.

  3. Jeremy The Truck Guy says:

    You get 17 mpg for the first half a tank and 50 mpg for the next 500 miles. HA HA HA. Computer is like: WHAT THE HECK!!! IM MAKING FUEL…SWEET!”

  4. Mickey says:

    I can’t see the one mounting in the bed at all. Taking a big chance when rear ended. When fuel tank ruptures and gas spills into the bed you’re sitting over your muffler. Great chance of flame on. The one under to replace the original tank is the way to go. Still not intrested. Can you see to fill up is well over $100. Last summer over $200

  5. Ingle says:

    ooooooh,, I like the latter choice.

  6. Good points, but I think the people looking for these big tanks either need extended range for work/commercial reasons and/or they’re hauling a big load cross country and they’re looking to boost their range. They’re not for everyone, but it’s still pretty cool. Still waiting to hear back on the computer fuel economy question…

  7. AM says:

    Gee and at only $1089.00 for the extra 21 gallons I’ll buy two!

  8. AM – LOL – That’s not really correct math, but it still made me laugh.

  9. TXTee says:

    I really like the idea but the cost just killed it. I’m hoping NOT to do much more commuting cross country in the near future but I do wish I had a bigger fuel tank. And I really wouldn’t mind paying extra to fill up…it all balances back out anyway or you can choose to only put a certain amount of gallons at a given time.

  10. TXTee – I think you’re a person they’re trying to interest. As many long range trips as you make, you can see the value in having a bigger tank.

  11. TXTee says:

    Especially after being detoured for road closures due to snow and not knowing where the next gas station is since it wasn’t the usual route……I REALLY could have used it in December. Gas is about the only reason I stop so it would be sweet to drive for 12+ hours straight like a diesel.

  12. Mickey says:

    Not to mention if you know where gas is the cheapest when you make that long trip.

  13. Jack says:

    Maybe I missed it but where exactly can you have this done and whats the warranty like? Will it affect any safety considerations of the truck

  14. Jack – Like all after-market parts, as long as the part does not cause a failure, it doesn’t impact your warranty. If the kit is installed correctly, it won’t cause a failure. Safety is definitely a consideration, but that’s exactly why you want to go with a kit like this one rather than a DIY kit. As long as installation is done correctly, there’s no more safety risk with an after-market fuel tank than there is with your OEM tank.
    ###
    Finally, most trailer shops / towing shops will install this type of kit. Check with your local RV dealer for a shop recommendation if you’re not sure of who to call in your area. There are a few brands of after-market fuel tanks to choose from – this is just one option.

  15. Norm Manka says:

    I have a 2008 and just had the tank put in and now the gas gauge well not work,HELP!!!!!!!!!!!!

  16. Norm Manka says:

    By the way it a Tundra, 4/4, 5.7
    Thanks

  17. Jason says:

    Norm – Sounds like it was either broken or not re-connected properly (I vote not re-connected).

  18. Norm Manka says:

    Had the Fuel Pump looked at and they found ,Float had come off . Put back on and gauge works OK now.

  19. Jason says:

    Norm – Glad it wasn’t anything expensive.

  20. Jon says:

    Something like this would be very helpful for me. My 2008 Crewmax 4×4 gets about 120 miles on a good day, while towing our 34-foot TT. It’d be nice to not have to stop every two hours while traveling cross-country. This forum provides a lot of valuable info. Thanks.

  21. Jason (Admin) says:

    Jon – Glad to hear it! If you like the work we do here, please be sure to share links to our articles on your favorite forum, Facebook page, etc. Links help us get more visitors, and that helps us get advertising.

    Thanks!

  22. dan b says:

    would this tank work on a sequoia?

  23. Jason (Admin) says:

    dan – They might, but the Sequoia’s frame and suspension are a little different. Still, I think a phone call to Transfer Flow is a good idea. They have the ability to customize a tank.

  24. Ralph J says:

    Jason you mentioned that Transfer Flow is only one option, who are the others?

  25. Jason (Admin) says:

    Ralph – I’ve never found one, but I was told by a local RV/trailer accessory shop they could order a couple of different brands. Never tied them down…sorry.

  26. Mike R says:

    Just watched the 2014 Tundra reveal, and it doesn’t include a bigger fuel tank. Toyota’s motto was “Tundra has always delivered the things you need in a truck. Now Tundra gives you the things you want in a truck.” I WANT A BIGGER FUEL TANK! Not one designed for a go-kart. I don’t “want” a blind-spot sensor. It’s a Tundra – they’ll get out of your way when you’re ready to move over.

    With that said, I can’t seem to find any clear explanation as to why this tank would not work in a Flex Fuel Tundra. I also have to assume that “non-California vehicles” means non FFV. No clear explanation can be found there either.

    So, can this tank work in a Flex Fuel Tundra, as long as you don’t put E85 fuel in it? I live in the Southeast, where E85 is near non-existent.

  27. […] tank (transfer flow). Here is a discussion at Tundra Headquarters. 47 gallons should be sufficient. Transfer Flow Extended Range Fuel Tanks For The Tundra | Tundra Headquarters Blog __________________ 2010 Tundra, CM, 4×4, 5.7, TRD Off Road, Silver Sky Tundra Club #7 Brushed […]

  28. mike says:

    Why are california cars excluded if all cars have california smog at this point in time. What are my options if I can not use the transfer flow tank? Need more fuel holding capacity !!!!

  29. OZ says:

    I put a 40 gal in my Duramax Chevy when I bought it 5 yrs ago. Best investment ever when towing. 26 gal just does not make it when you have to maneuver a truck and trailer and stop every 200-250 miles. Worth very penny but anyone know where I can get one discounted for the Tundra?

  30. Preston says:

    Can this be used on a 2013 4×4 5.7L Crewmax FlexFuel model?

    • Tim Esterdahl says:

      Yes.

      -Tim

      • Mike R says:

        Tim, can you use E85 fuel in this tank? Are you a representative of the tank manufacturer?

        • Tim Esterdahl says:

          Mike,

          I don’t know that much and no I am not a representative. I just know from talking to other owners, it will fit your model.

          I’d be a little surprised if it didn’t work with e85.

          -Tim

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