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jeffjcalweb's avatar
jeffjcalweb
Explorer
Jun 13, 2020

"Auxillary" Fuel tank vs installing a new/larger tank

Hello - I have a 2017 Ram 2500 w/Cummins with the 6'4 bed, and just purchased our first fifth wheel.

I'd like to add fuel capacity for towing and have seen a few threads here with some discussion about transfer cases etc.

I live in CA and first couple places I have called asking about "gravity fed transfer case" said it was "frowned upon in CA - like most emission, tuning, etc for diesels".

So I can put install a 50g auxiliary tank (transferflow TRAX 3) that comes with a nice LCD display and controls with automatic fuel transfer but installed runs close to $2500.

I've also looked at replacing the OEM tank and looks like 52g is about the biggest thing available. That installed is also around $2k.

I don't mind spending the money, I am hesitant to put in the auxiliary tank because of the space it will take up. The truck has a B&W turnover gooseneck bed setup which I plan to use with an Anderson hitch.

I'm also hoping maybe there's something (besides just a few 5g portable cans) that might allow me to not have the tank in the bed when we don't need it (which will certainly be 90% of the time).

Is there another option? And is anyone in CA that has had a gravity fed tank installed (about half the price of the TRAX 3 system)?

Thank you, sorry for the long question.