Transfer Flow Low Profile Under Tonneau Auxiliary Fuel Tank

The low profile Transfer Flow auxiliary fuel tank is designed to fit under tonneau covers.  Choose from 40 or 50 gallon sizes. Either option offers minimal height designed to fit comfortably underneath your tonneau cover. 

The Transfer Flow In-Bed auxiliary fuel tank is designed to be compatible with almost any diesel truck, including half-ton pickups, trucks with utility beds, RamBox equipped trucks, or those with a factory installed 5th wheel prep package or other 5th wheel hitch.

The patented fuel tank design has a recessed cover box where the sending unit, rollover valve, and fuel filter come preassembled. You'll be pleased that its low height means it can fit under most standard tonneau bed covers.

This auxiliary system is computer-controlled by the patented TRAX 4™ operating system with exclusive AutoTrans® technology. Computer-controlled automatic fuel transfers mean worry-free operation, and much safer and more reliable operations than gravity fed systems.

Want to know the status of your on-board fuel systems? Simply download the TRAX 4™ app to your smart phone and enter your vehicle and fuel system information. In no time, you’ll be able to monitor your pickup’s fuel capacity! During fuel transfer, the message “PUMP ON” will be displayed. You also have the option of displaying either the gallons or the percentage of fuel in each tank.

If you prefer not to use the TRAX 4™ app with your auxiliary tank but still want to know how much fuel you have, Transfer Flow offers an in-cab fuel level monitor LCD. The LCD shows the fuel level of the auxiliary tank with an easy-to-read bar graph that decreases when fuel is transferred to the pickup’s main fuel tank. This item is sold separately.

Built from ReliaSteel®, high-yield U.S. aluminized steel; and powder coated black, TFI tank systems offer superior corrosion resistance and strength.

Sizes:

• 40 Gallon - 48 inches long x 19 inches wide x 19.38 inches high.
• 50 Gallon - 60.75 inches long x 18.5 inches wide x 18.25 inches high.

Notes:

• The 40 gallon size includes a fill neck located at the top front corner of the tank.
• The 50 gallon size includes a fill neck located at the top of the tank. The 2.5 inch fill neck is included in the 18.25 inch total height of the 50 gallon tank. 

Fits:

• 40 Gallon - 2008-22 Ford, 2010-22 GM, 2010-22 Dodge/Ram
• 50 Gallon -  2008-22 Ford, 2010-22 GM, 2010-22 Dodge/Ram 

FEATURES

• Recommended for drivers who require additional fuel capacity but require a small footprint to maximize available bed space for 5th wheel hitches, Rambox beds, and cargo.
• Won't interfere with standard 5th wheel hitch.
• Fits under most tonneau bed covers.
• Robot-welded seams provide extraordinary strength, unlike rotationally molded plastic tanks or cheaper steel brands.
• Fuel tank systems include all components needed for installation.
• TRAX 4™ computer-controlled automatic fuel transfers for worry-free operation with exclusive AutoTrans® technology.
• Built from ReliaSteel®, high-yield U.S. aluminized steel powder coated black for superior durability and strength.
• Baffled to prevent fuel sloshing.
• 6 year, unlimited mile warranty.
• Made in the USA.

Other Auxiliary Tank Options:

• Transfer Flow Auxiliary Tank
• Low Profile Auxiliary Tank