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Phoenix, Arizona

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Tucson, Arizona

Auxiliary Fuel Tanks

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Tranfer Flow In-Bed Auxiliary Tanks

Auxiliary Fuel Tanks
Increase your Ford, GM or Dodge Ram diesel pickup’s fuel capacity and driving range with an in-bed auxiliary fuel tank systems from Transfer Flow! Transfer Flow in-bed auxiliary tanks are available in 37, 50, 75, 98 and 100 gallons, and are available in sturdy aluminized steel and bright diamond plate. Transfer Flow fuel tanks are fully baffled to minimize fuel sloshing and come complete with all necessary installation components and detailed instructions (some pickups require a fillneck kit or tee). Using the patented technology of our TRAX 3™ operating system, the transfer process is entirely automatic and 100% worry free! Exclusive design features allow some tanks to be used in conjunction with other popular cargo accessories such as retractable truck bed covers and tonneau covers. Let us "fuel your adventures" with a safe, legal and durable in-bed auxiliary fuel tank system from Transfer Flow!
  • Operates with Transfer Flow's patented TRAX 3™ operating system
  • Fuel transfers automatically from in-bed fuel tank to stock fuel tank
  • Available in 37, 50, 75 and 98 gallons
  • Manufactured from aluminized steel or aluminum diamond plate
  • Baffled to reduce fuel sloshing
  • Won't interfere with standard fifth wheel hitch
  • Optional Spray-on coating available
  • Proudly made in the USA!


TRAX3 Monitoring System Included

Transfer Flow #16180 37 Gallon Auxiliary Tank
37 Gallon Auxiliary Fuel Tank - #16180
Ideal to work under roll-top and folding tonneau covers

Price: $1,652.95


Our 37 gallon in-bed fuel tank fits short and long bed pickups. It's designed to fit under Pace-Edwards and Truck Covers USA retractable bed covers. The tank is available in 14 gauge aluminized steel with black powder coat finish.
  • Ideal for pickups with roll-top or folding tonneau covers installed
  • Trax 3 Monitoring System Included
  • Dimensions: H:18 1/2" x W: 19 1/2" x L: 50"
  • Add 3 inches to the length & width for munting brackets
  • 37 Gallon Fuel Capacity


Transfer Flow #16184 - 50 Gallon Auxiliary Tank
50 Gallon Auxiliary Fuel Tank - Low Profile - #16184
Fits under tonneau and roll top covers

Price: $2,259.95


The height of this tank allows it to fit under a tonneau cover. This tank fits short bed and long bed pickups, and is available in either 14 gauge aluminized steel with black powder coat finish or bright polished aluminum diamond plate.
  • Ideal for pickups with roll-top or folding tonneau covers installed
  • Trax 3 Monitoring System Included
  • Dimensions: H:14 3/4" x W: 16 1/2" x L: 60 3/4"
  • Add 3 inches to the height for fillneck and/or sending unit cover box
  • 50 Gallon Fuel Capacity


Transfer Flow #16182 75 Gallon Auxiliary Tank
75 Gallon Auxiliary Fuel Tank - #16182
Surprisingly Space Saving

Price: $1,468.95


Our 75 gallon in-bed fuel tank is just 18" deep and delivers a significant increase in fuel capacity while maintaining maximum cargo space. The tank fits short and long bed pickups. It is available in 14 gauge aluminized steel with black powder coat finish (tanks shown in photo has our optional spray-on coating).
  • Trax 3 Monitoring System Included
  • Dimensions: H:19" x W: 18" x L: 59 1/2"
  • Add 3 inches to the width for munting brackets
  • Add 3 inches to the height for fillneck and/or sending unit cover box
  • 75 Gallon Fuel Capacity


Transfer Flow 98 Gallon In-Bed Auxiliary Fuel Tank, #16183
98 Gallon Auxiliary Fuel Tank - #16183
High Capacity Fuel Storage

Price: $1,835.95


Our popular 98 gallon in-bed auxiliary fuel tank comes in black powder coated finish, with the height being about flush with most pickup bed rails.
  • Ideal for long trips without frequent fuel stops
  • Trax 3 Monitoring System Included
  • Dimensions: H:18 1/2" x W: 25" x L: 60 3/4"
  • Add 3 inches to the height for fillneck and/or sending unit cover box
  • 98 Gallon Fuel Capacity
  • Aluminum diamondplate finish available


Transfer Flow #15841 - 100 gallon auxiliary tank
100 Gallon Auxiliary Fuel Tank - #15841
Maximum Fuel Storage

Price: $2,186.95


Our 100 gallon in-bed fuel tank is just what your long bed pickup needs for those long hauls! Made from bright aluminum diamond plate and mill finish aluminum. You’ll love the sleek new look of our patent pending design!
  • Fits 8 ft long bed pickups only
  • Ideal for long trips without frequent fuel stops
  • Trax 3 Monitoring System Included
  • Dimensions: H:20" x W: 27" x L: 50 3/4"
  • Add 3 inches to the width for munting brackets
  • Add 3 inches to the height for fillneck and/or sending unit cover box
  • 100 Gallon Fuel Capacity