TRAX 4 Mobile App
Want to know the status of your on-board fuel systems? Simply download the TRAX 4™ app to your smartphone 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. With the TRAX 4™ app, you'll be able to monitor:
- Fuel levels shown in your main and auxiliary tanks
- Gallons or percentage of fuel shown in each fuel tank
- Fuel system operating status, including when fuel is being transferred
- Your Distance to Empty in miles

Fuel Level Monitor LCD
If you prefer not to use our 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 optional and is sold separately.
Refueling Kit
Add refueling capabilities to your 40-gallon auxiliary fuel tank and tool box with the addition of our Refueling Kit! With this kit, you'll get an auxiliary tank and refueling tank all-in-one! This item is optional and is sold separately.
Transfer Flow 40 Gallon Auxiliary Diesel Fuel Tank and Tool Box Combo
Elevate Your Truck's Capabilities With The Ultimate 40-Gallon Auxiliary Fuel Tank and Toolbox Combo.
Our 40-gallon auxiliary fuel tank and toolbox combo is your all-in-one solution for increased fuel capacity and organized tool storage. Crafted to fit seamlessly with your truck bed rails, this ingenious design improves your vehicle's fuel capacity while maintaining compatibility with most fifth-wheel hitches. With an impressive 6 cubic feet of secure, lockable storage, your tools and equipment remain accessible and protected, whether you're tackling a tough job or enjoying a weekend adventure.
Harness the power of Transfer Flow's cutting-edge TRAX 4™ technology that streamlines fuel management like never before. Featuring automatic fuel transfer, this system ensures a smooth, stress-free experience by monitoring fuel levels and handling transfers on the go. Stay informed with real-time updates right on your mobile device.
The TRAX 4 mobile app serves as your command center, allowing you to monitor fuel levels easily, determine miles-to-empty (MTE), and track fuel transfers—all from the convenience of your smartphone. With up-to-date insights on both your main and auxiliary tanks, planning your refueling stops is simpler than ever, making your trips more efficient.
Proudly made in the USA, this combo is an essential upgrade for those who prioritize efficiency and security on the road.
Why You'll Love It:
- Lockable handles for secure storage
- Robot-welded seams for extraordinary strength
- TRAX 4™ automatic fuel transfers for hassle-free operation
- Built from 12- & 14-gauge high-yield U.S. aluminized steel for superior durability
- Robot-welded seams for extraordinary strength
- Gas-filled shock lifts allow easy access to storage
- Baffled to prevent fuel sloshing
- 6-year, unlimited-mile warranty
- Proudly made in the USA from American-made steel
| Option | Unit | Purchase | |
|---|---|---|---|
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40 Gallon Fuel Tank & Tool Box Combo - TRAX 4
0800116188|Warehouse1
|
$2,898.00/EA
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40 Gallon Fuel Tank & Tool Box Combo - TRAX 4
0800116188|Warehouse4
|
$2,898.00/EA
|
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|
40 Gallon Fuel Tank & Tool Box Combo - TRAX 4
0800116188|Warehouse7
|
$2,898.00/EA
|
||
|
0800116188
|
$2,898.00/EA
|