Hey Folks!We would like to add an auxiliary fuel tank to our F350. We have been looking at the in-bed models from TransferFlow, Titan, etc.I would like the tank to fit under a tonneau cover.Do you guys have any experience with these tanks?We are also looking at the replacement tanks that mount under the truck bed. However, these make me a little nervous with possible road debris causing issues. This version leaves my bed free, which is a big deal.What do you guys think?Thanks so much!

I added an RDS 45 gallon in bed tank to our '06 RAM a few years ago and then transferred it to our '15 RAM in the spring of 2015 shortly after buying it. I love the extra fuel I can carry! If I had one regret it is that I should've bought a slightly larger tank, maybe 60 gallon. There are all sorts of configurations and brands of tanks to choose from, I chose RDS and gravity feed for it's simplicity. Yeah I have to manually flip the switch instead of switching it from the cab but I'm OK with that. I like being able to pick & choose where and when I buy fuel.Dan

Good idea!I have this tank: http://www.tank-depot.com/productdetails.aspx?part=ATI-AUX41RIKCIt fits under my tonneau cover just fine.Had my mechanic install it.It has been just fine for several years.I use an additive (Stanadyne) which comes in a bottle that treats 30 gallons. So I add the Stanadyne and fill the tank with 32 gallons, then let it flow into the truck's stock tank.This works for me.There are many vendors, sizes and shapes.Happy shopping!

Titan not only makes a large replacement tank, they make a rock shield for it.Transferflow has a solid repAssuming of course you are talking about Diesel and not Gas

tomthyme wrote:Hey Folks!We would like to add an auxiliary fuel tank to our F350. We have been looking at the in-bed models from TransferFlow, Titan, etc.I would like the tank to fit under a tonneau cover.Do you guys have any experience with these tanks?We are also looking at the replacement tanks that mount under the truck bed. However, these make me a little nervous with possible road debris causing issues. This version leaves my bed free, which is a big deal.What do you guys think?Thanks so much!Go with Transfer Flow. I am currently on my 3rd. auxillary fuel tank from them. I have a 60 gal. tank which fits under the truck in the same location that the original tank was located and never have had any problems. This tank does away with any gravity feed issues or flip switches. I took my truck in at 9:00am and picked it up at 5pm. with a full tank of diesel:):) It is too bad that auxillary tanks are not made for gas engines:(

Have a 90 gallon transfer flow mounted in the bed of my 35000. Has worked flawlessly for two years. I don't have a bed cover but it does sit below the rails. I filled up today at $1.89 where the FedEx trucks fill up, everywhere else is running $1.99 to $2.29. Saved some money and shouldn't need to buy fuel for several months.

Auxiliary Fuel Tank options | Good Sam Community

Ltrip
Explorer
May 08, 2016
Good idea!
I have this tank: http://www.tank-depot.com/productdetails.aspx?part=ATI-AUX41RIKC
It fits under my tonneau cover just fine.
Had my mechanic install it.
It has been just fine for several years.
I use an additive (Stanadyne) which comes in a bottle that treats 30 gallons. So I add the Stanadyne and fill the tank with 32 gallons, then let it flow into the truck's stock tank.
This works for me.
There are many vendors, sizes and shapes.
Happy shopping!
dapperdan
Explorer
May 08, 2016
I added an RDS 45 gallon in bed tank to our '06 RAM a few years ago and then transferred it to our '15 RAM in the spring of 2015 shortly after buying it. I love the extra fuel I can carry! If I had one regret it is that I should've bought a slightly larger tank, maybe 60 gallon.

There are all sorts of configurations and brands of tanks to choose from, I chose RDS and gravity feed for it's simplicity. Yeah I have to manually flip the switch instead of switching it from the cab but I'm OK with that. I like being able to pick & choose where and when I buy fuel.

Dan

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