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LWB Fuel Tank replacement // modified off-application


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Yesterday I had to hammer on my fuel tank a little to fit new shocks. The stock shocks had hit and bent the lip so I feel like that's a design flaw from the packaging engineers. Thanks Jeep. Anyway. I looked around and couldn't find any info on replacement non-stock tanks in long wheelbase Comanches. I'd like to get something in there that is plastic so it'll last. My stock one has a distinct odor so I suspect there is an issue but I haven't checked it out much. I understand there are stock replacements readily available, but I'm not afraid to step outside the box. Can anyone point me to the biggest or best tank someone has already put under a long bed? Thank you.

 

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Guys have fitted the Dakota tank........may look in that direction.

I'll probably be going to the junkyard with a tape measure and a strap cutter soon.

 

Some factory lwb trucks came with a 23.5 gal tank

The three tanks on Rock Auto are all 23.5 gal. With the stock tank hitting my stock suspension, I really want something different.

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I have looked off and on for 6 or 7 years for an easy fit larger tank or a second tank without much luck.  I keep looking on Craigslist for a boat tank or some other custom tank that might fit.  From what I can see, the stock long bed 23.5 gal tank is just about as big as can fit.  Would guess a larger stock replacement tank could be fabricated to add a few more gallons.  The replacement Dakota tank is a 22 gallon tank and requires some work with the sender,  But it is plastic, so that may be of some help.  It required some custom work to fit the Comanche.

 

Good luck with the search.  Love to hear what you find.

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I have looked off and on for 6 or 7 years for an easy fit larger tank or a second tank without much luck.  I keep looking on Craigslist for a boat tank or some other custom tank that might fit.  From what I can see, the stock long bed 23.5 gal tank is just about as big as can fit.  Would guess a larger stock replacement tank could be fabricated to add a few more gallons.  The replacement Dakota tank is a 22 gallon tank and requires some work with the sender,  But it is plastic, so that may be of some help.  It required some custom work to fit the Comanche.

 

Good luck with the search.  Love to hear what you find.

I'd consider adding a TJ or XJ tank behind the axle but I haven't gotten that far yet. I'm shortening the rear overhang eventually so that's a tomorrow problem. My stinky gas tank has to go soon.

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The spare tire area is the clear location for a second gas tank on the long bed.  The down side is the big X brace behind the axle.  It takes up a whole lot of space under the bed.  Still a 38 wide and an easy 30 inches deep for a shallow tank.  How high can the tank be?  Well that depends on how low you are willing to let it hang down.  The mid 80's to mid 90's F150 rear tank holds 19 gallons and is only 8.5 inches thick.  My spare is thicker than that.  Ford Bronco's have some tanks that would hang down a bit more.  Some 25 gallon Chevy Suburban tanks would fit and not hang down as much.  28 x 28 x 10.75  Not bad.  The 92-97 Suburban came with a 42 gallon tank that measures 29-3/4 X 33-1/2 X 13-1/8 inches.  Only 2.5 inches lower than the 25 gallon mid 80's Suburban tank.   There are a couple of other size Suburban tanks from the same vintage.  Think there were 26 gallon tanks in full size GM's of the mid 80 that were quite thin.

Problem is what to do with the spare tire.  Use a compact spare and a bulkhead fitting thru the tank to hold the compact spare would solve the spare tire problem.

 

The real question is how much gas do you need to carry?  Now with a 30 gallon 2nd tank, the Comanche could go 1000 miles between fillups.  With my Passat TDI, my tank holds 25 gallons and I can drive 1200 plus miles without refueling.  Problem is my bladder will not hold that long on the road.  So how much gas do you need/want to carry?

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My rear under bed area is free of the spare. I took off my broken spare tire winch and the factory accessory spare tire bracket (that isn't broken, was the only thing holding my spare up) and my spare will be mounted in the bed with a TJ spare mount this week. There's room for a 35, heck maybe even more there.

 

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I just want a poly tank for the stock location so I don't have to worry about it, and I'd like it to be at least as big as the stock tank. If I lose a gallon for a Dakota tank, that's not a big deal, worth it to get the poly tank.

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