90 gal. Aux fuel tank below bed rails. Help.

[speediq99]

Hello,

I am looking for a 90g. aux transfer fuel tank that sits below bed rails on Ram 3500.

RDS has a couple but their gas cap sits an inch or so too high making a tonneau cover not possible. It seems like the options I found are either tall rectangular (cannot use cover) or deep rectangular (30 inches of bed gone). Anyone found something tall and thin that works with a cover?

MC

[speediq99]

I decided to go with an RDS 72743 60 gal combo. I already had 50g on the truck and the toolbox was a nice to have for Def, cables etc.

Going to 90g plus the 50g would be a hell of a lot of weight to carry around. The 110g give me 1900+ miles unloaded and 1000 miles or so loaded which is plenty to get me to most destinations and gives me range when in remote locations. I seldom drive more that 350 miles a day with a 5th on the truck.

Thank you for all the feedback.

MC

BurbMan wrote:
No question more is better, but to your point I think keeping it covered trumps that....I paid $5.20 last weekend. Post a link to what you decide on, I've been thinking about doing the same.

[rhagfo]

speediq99 wrote:
Hi,

I have an 8ft bed so enough room. I just want to leave space to carry 2 bikes upright. The RDS 60 is a good compromise.
Do you have enough room in the toolbox to store DEF fuel? Any issues with the gravity fill?

Thank you

MC

Bionic Man wrote:
How much depth do you have?

FWIW, I have the RDS 60 combo. I've never wanted more, 96 gallons give me plenty of range.

Not sure where you plan on carrying two bikes upright in the bed of the truck pulling a 5er.

You might consider a pin box mount for the bikes.

[fj12ryder]

Just a thought: don't forget to take into account the weight of 90 gallons of fuel and fuel tank. Easily 700 lbs. Just a thought.

[Bionic_Man]

speediq99 wrote:
Hi,

I have an 8ft bed so enough room. I just want to leave space to carry 2 bikes upright. The RDS 60 is a good compromise.
Do you have enough room in the toolbox to store DEF fuel? Any issues with the gravity fill?

Thank you

MC

Bionic Man wrote:
How much depth do you have?

FWIW, I have the RDS 60 combo. I've never wanted more, 96 gallons give me plenty of range.

My truck is a 2012 so no DEF. But I’m pretty sure it would fit. I have jumper cables, tie downs, bungees and a bunch of other stuff I rarely use in there.

Gravity feed works fine. I added the tank to my truck 10 Years ago when it was brand new and never really had an issue as long as you make sure the gas cap is tight. If it isn’t you can over fill and have fuel run out.

[speediq99]

Hi,

I have an 8ft bed so enough room. I just want to leave space to carry 2 bikes upright. The RDS 60 is a good compromise.
Do you have enough room in the toolbox to store DEF fuel? Any issues with the gravity fill?

Thank you

MC

Bionic Man wrote:
How much depth do you have?

FWIW, I have the RDS 60 combo. I've never wanted more, 96 gallons give me plenty of range.

[Bionic_Man]

How much depth do you have?

FWIW, I have the RDS 60 combo. I've never wanted more, 96 gallons give me plenty of range.

[PastorCharlie]

HERE

[Cummins12V98]

You may want to consider the TITAN 55G replacement tank. This way you can place a nice tool box in the bed instead.

[RoyF]

I have a 100-gallon aluminum auxiliary diesel tank that has been sitting unused for a few years. It's a KSH, which is located in Lake Havasu City, Arizona. I would love to get rid or it. It looks exactly like the 100-gallon tanks shown on KSH's website.

Here's the story. A year after it was installed in a Ford F350 diesel, I started to have fuel blockage problems. Mechanics could never find anything wrong with the truck's fuel system, and it only happened when I was drawing fuel from the auxiliary tank. I finally just gave up and removed the tank, and I never had another fuel blockage. I installed a Transfer-Flow tank and just stored the KSH.

After removing the tank and draining it, I looked inside and saw what looked like a marble, or maybe a large ball bearing. It must have been dropped in by accident. (Or was it done by someone as a prank?) That ball must have been rolling around during travel, and now and then it would come to rest over the fuel outlet where it would create a blockage. I'm sure that was the problem all along.

There is the problem of shipping, but if you are interested, please send me a private message.

[BurbMan]

No question more is better, but to your point I think keeping it covered trumps that....I paid $5.20 last weekend. Post a link to what you decide on, I've been thinking about doing the same.

[speediq99]

No particular reason other than if I am going to use the bed might as well go big. I can always use 60 or 90 on a pinch.

It actually looks like 60g with a tool box fit well and takes as much room as 90 without one. I just prefer the extra 30 gallons to the toolbox.

MC

BurbMan wrote:
Stock tank is 36 gals, if you went with a 60 gal you would triple your range...Why 90 gals?

[speediq99]

That might be the best option. It looks like adding a bit more depth and either shrinking or recessing the cap would have been enough. I am just surprised the missed it by an inch or so in most trucks. Covering this liquid gold is important these days.

MC

wanderingbob wrote:
It is a matter of math , ninety gallons requires a large amount of volume . I wonder if you could alter the ninety gallon tank and recess the lid ?

[BurbMan]

Stock tank is 36 gals, if you went with a 60 gal you would triple your range...Why 90 gals?

[wanderingbob]

It is a matter of math , ninety gallons requires a large amount of volume . I wonder if you could alter the ninety gallon tank and recess the lid ?