Ram Heavy Duty Forum
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Aux fuel tank
That is a point. In my case, with aux tank plus 5th wheel hitch (that is VERY HEAVY), plus short bed, makes my truck pretty much a camper hauler only. I'll have to rent a utility trailer if I need to bring home a sheet of plywood! -
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Aux fuel tank
I put a 60 gal RDS aux tank in my 3500 short bed with 5th wheel hitch. All works together just fine. I don't see any way the aux tank can void warranty, it's actually nothing more than putting a load in the truck, and that's what trucks are made for. The gravity feed part of it does require... -
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Aux fuel tank
Ok, issue resolved. I talked with RDS and was told it is supposed to build up pressure in the OEM tank, that's what stops it from over flowing -- I found that out the hard way, after losing about a gallon while I went in to pay and had installed an aftermarket gas cap which keeps the flapper... -
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Aux fuel tank
Not a vacuum issue... actually a pressure issue that builds up in the OEM tank. As long as I hold the OEM flap open, the aux tank drains into the OEM tank. What year is your Ram? You have the DTE gauge? -
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Aux fuel tank
"...leave mine open all the time..." Do you have the DTE gauge and not get an error/check engine warning? I just had an RDS 60 gallon tank, gravity feed, installed in my 2021 Ram. I haven't tried leaving it open while driving, but I just tried to fill the OEM tank from the aux tank, and the...