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Old 06-13-2018, 03:27 PM   #1
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8' bed, 60+ gallon aux tank, tonneau cover

Now that's a title

Has anyone installed a 60+ gallon TransferFlow or Titan auxiliary fuel tank and then installed a shortened roll top tonneau for a long bed? If so, can I ask which ones; and perhaps include a picture.

Thanks,
Ron
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Old 06-13-2018, 04:59 PM   #2
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I put a 110 gallon DuallyDepot aux tank in my 8' box and a trifold tonneau cover. I did cut out a hole to access the fill cap, otherwise out of sight out of mind.


How do you like your 2018 GMC? I pick up my 2018 Chevy CCDRW next wed. I plan to transfer the aux tank to my new truck.
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Old 06-13-2018, 09:52 PM   #3
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Originally Posted by rawn77 View Post
Now that's a title

Has anyone installed a 60+ gallon TransferFlow or Titan auxiliary fuel tank and then installed a shortened roll top tonneau for a long bed? If so, can I ask which ones; and perhaps include a picture.

Thanks,
Ron
I don't have but have seen many others that have had special ordered this
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Old 06-13-2018, 09:56 PM   #4
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I put a 110 gallon DuallyDepot aux tank in my 8' box and a trifold tonneau cover. I did cut out a hole to access the fill cap, otherwise out of sight out of mind.


How do you like your 2018 GMC? I pick up my 2018 Chevy CCDRW next wed. I plan to transfer the aux tank to my new truck.
I get my truck next Monday; very excited to say the least.
You have quite the setup!
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Old 06-13-2018, 10:01 PM   #5
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When I researched this, I determined that the rails of the cover could interfere with the pin box in a sharp turn. I really wanted to cover my setup but I donít think it would have not worked + getting to fuel nozzle would have been an issue
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Old 06-14-2018, 07:35 PM   #6
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Access makes a cover that might work. Itís called the Access Toolbox Edition Roll-up Cover. It would add an inch to your bed rail height. Hereís a link: https://www.accesscover.com/toolbox/
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Old 06-15-2018, 08:58 PM   #7
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I've been researching this a little myself as I have an Extang trifold cover and fueling up a tank would be difficult as the forward third of the cover is fixed. A tank where the fill nozzle extends through a hole in the cover wouldn't work as the other sections need to fold flat when towing. I've read other forums about a foldable hard tonneau where the front section folds back for just that purpose. Can't remember the name. The fill nozzle on a Titan plastic tank is recessed with the total tank height being less than 20", should fit any truck with a cover.
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Old 06-15-2018, 09:04 PM   #8
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Quote:
Originally Posted by grindstone01 View Post
I put a 110 gallon DuallyDepot aux tank in my 8' box and a trifold tonneau cover. I did cut out a hole to access the fill cap, otherwise out of sight out of mind.


How do you like your 2018 GMC? I pick up my 2018 Chevy CCDRW next wed. I plan to transfer the aux tank to my new truck.
How does that extra 1,000 lbs affect your weight considerations?

I'd love to have an extra 110 gallon capacity on my motorhome but no one offers upgrades on motorhomes.
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Old 06-16-2018, 08:14 AM   #9
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How does that extra 1,000 lbs affect your weight considerations?

I'd love to have an extra 110 gallon capacity on my motorhome but no one offers upgrades on motorhomes.
...


I don't notice the extra 800 lbs of fuel at all, really can't tell the difference. Keep in mind the aux fuel tank is forward of the rear axle and low center of gravity with the weight being in the pickup bed. Also the dually rear axle is rated for 11k lbs by itself and the springs don't even squat with the FW hooked up and full PU box of tools.
As far as access to fill the tank, I calculate the fuel needed for our travel and as long as it is less than 1400 miles, I will just get that much fuel before I hook up. Yesterday I filled up in West NY at a reservation for $2.85/gal which is a 50 cent/gal saving and that should last into Mich and the next month of fuel needed.


You could add a aux tank in a storage compartment of your MH and with a pump transfer the fuel to the main tank.
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Old 06-16-2018, 10:29 AM   #10
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Access makes a cover that might work. Itís called the Access Toolbox Edition Roll-up Cover. It would add an inch to your bed rail height. Hereís a link: https://www.accesscover.com/toolbox/
I have an access cover and I hate it!! Those silly rails on the left and right constantly fall down... either they fall just enough to keep the tailgate from closing, or sometimes they lose the clamp all together. In either case, you're busting out the wrench and probably an impact driver to correct it. I'm really not impressed with how the rails attach to the truck.

And if you ever need to grab that edge of your truck bed.. say for instance you are about to stand up on a tire, and you grab for the bed edge to hoist yourself up,,, whoops, you just moved that rail.

It might be that simply my dodge is the issue as the truck bed lip has no "lip".. might be different on different trucks, so I don't want to paint with such a broad brush...
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Old 06-18-2018, 07:56 AM   #11
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I went with the 40 gallon in-bed Transfer Flow tank as they said it is the only one for my application (gas) that would fit under my bed cover. I hope it fits as they say, the tank should be here tomorrow.
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Old 06-18-2018, 09:36 AM   #12
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My 2016 Ford F-250 diesel has the small tank, 26 gallons. Ok if not towing but not enough range when towing. I had a local truck accessory shop install a 51 gallon gravity feed auxillary tank in the front of the bed. It's made by RDS engineering out of Perry FL. Has a tool box portion on top of the fuel cell. I wanted the 40 gallon version because more tool box capacity but got the 51 gallon version because it was about $100 less than the smaller. In retrospect I'm glad I went with the bigger tank. I figure a useful fuel load of about 45 gallons. They did have to trim about 1/2" off the front legs of the B&W companion hitch so the tank would fit and not hit the tank. Tank connects to the fuel filler tube with a flow restrictor that takes about 30-40 minutes to transfer about 20 gallons. Fuel gauge went from just under 1/4 to the F mark when I shut off the valve.

I also want a tonneau cover for the truck bed since we will be putting a generator in the bed, chained down, but want things to be out of sight, out of mind when we travel. Same shop recommended the Access or Truxedo versions. I'm going to research both for compatibility. Considerations are security of the install and not too tall above the rail. I have plenty of clearance between the truck side rails and front of the 5th wheel but don't want the cover rails to stick up too much. The fuel cell is maybe 1/8" below the side rails so that clearance isn't an issue.
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Old 06-18-2018, 10:15 AM   #13
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One caution of advice through my experience is to eliminate the aux tank inline filter. I had not changed the inline filter (forgot about it) and the aux pump starved and failed. My thought is the fuel gets filtered between the truck tank and injectors anyway and that filter gets changed with regular service.
Gravity aux fuel systems can ignore this advise.
Even with the pump system, it takes about 45 min to transfer 25 gallons while running down the road. I use a kitchen cooking timer to set for 20 min when the tank gets 1/2 full so I don't over fill the truck tank. The tank has a overflow return tube, but I would rather not waste pump wear.
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Old 06-18-2018, 11:18 AM   #14
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I have a 50 gallon Transferflow w/Trax-3 in the bed and a hard 4 fold Bacflip F1. The Bacflip clears our DRV without problem. The tank works great and everything is out of sight and the sun.
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