transfer flow|SKU:0800116188-var-57307-ce1532

Transfer Flow Auxiliary Fuel Tank Toolbox Combo — Dual-Purpose Extended Range

Maximize Your Fuel Range and Secure Cargo Space

Extended range on-site — 40 or 70 gallon capacity options
Secure cargo storage — 6 cubic feet with locking handles
Smart fuel transfer — TRAX 4™ computer-controlled AutoTrans technology
Fifth wheel compatible — Sits flush, won't interfere with hitches
Real-time monitoring — TRAX 4™ app shows pump status live
  • Free shipping -- Ships free to your door, no minimums
  • TRAX 4™ app included -- Monitor fuel transfer from your smartphone free

Price range: $2,813.00 through $3,609.00

30-day money back · No restocking fee

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Ships in 3–5 Days Heavy-duty crating included.
4.9/5 Stars 2,400+ verified reviews.

In the box

  • Transfer Flow auxiliary fuel tank and toolbox combo
  • TRAX 4™ operating system with AutoTrans technology
  • TRAX 4™ smartphone app access
Transfer Flow Auxiliary Fuel Tank Tool Box Combo
Transfer Flow Auxiliary Fuel Tank Toolbox Combo — Dual-Purpose Extended Range
$2,813.00 – $3,609.00Price range: $2,813.00 through $3,609.00

Maximize Your Fuel Range and Secure Cargo Space

This vetted Transfer Flow auxiliary fuel tank and toolbox combo is a smart investment for fleet managers needing extended range and secure storage. Available in 40 gallon and 70 gallon capacities, this commercial-grade unit sits nearly flush with your bed rails and clears most standard fifth wheel hitches. The 6 cubic foot locking toolbox keeps cargo secure, while the TRAX 4™ operating system handles automatic fuel transfers safely. It ships free and includes a 30-day hassle-free return policy.

FREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORT
40 or 70 Gallon Capacity
6 Cubic Foot Toolbox
TRAX 4™ AutoTrans® System
Locking Paddle Handles
6 cu ft
Secure Storage Space
2
Capacity Options
$2,813
Starting Investment
Eliminate Gravity-Fed Fuel System Risks With Computer-Controlled Transfer

Eliminate Gravity-Fed Fuel System Risks With Computer-Controlled Transfer

Gravity-fed auxiliary tanks are a liability. Uneven fuel flow, spill risks, and inconsistent transfer rates create compliance problems and downtime you cannot afford. This curated Transfer Flow combo replaces guesswork with the patented TRAX 4™ operating system and AutoTrans® technology. The computer-controlled module transfers fuel at predetermined levels based on your vehicle's main tank capacity while you drive. No manual switches, no monitoring gauges, no exposure to unsafe fuel handling. The TRAX 4™ app displays real-time pump status on your smartphone, so you know exactly when fuel is moving. This is engineered fuel management, not a gravity hose with a shutoff valve.

Lock Down Your Cargo And Fuel With 6 Cubic Feet Of Secured Storage

Lock Down Your Cargo And Fuel With 6 Cubic Feet Of Secured Storage

Leaving tools and equipment unsecured in an open bed is an invitation for theft and weather damage. This combo unit integrates 6 cubic feet of locking storage with paddle handles directly into the fuel tank structure. The design sits nearly flush with most pickup bed rails, maintaining a clean profile that does not compromise bed utility. Your cargo stays protected and out of sight, while the fuel compartment remains sealed and compliant. For fleet operations where tools walk off and replacement costs add up, this dual-purpose design turns your truck bed into a fortified mobile workstation without sacrificing fuel capacity.

Maintain Full Towing Capability With Fifth Wheel Hitch Clearance

Maintain Full Towing Capability With Fifth Wheel Hitch Clearance

Adding an auxiliary tank should not mean sacrificing your towing setup. This Transfer Flow combo is engineered to sit nearly flush with most pickup bed rails and will not interfere with most standard fifth wheel hitches. Available in 40 gallon and 70 gallon capacities, the 70 gallon model features an over the bed rail style design that maximizes fuel volume without encroaching on hitch clearance. Whether you are pulling heavy equipment or hauling a fifth wheel trailer, your towing geometry stays intact. Tank Vault carries this unit because it respects the working truck — no modifications, no compromises, just additional fuel range and secured storage that works with your existing setup.

Compatibility Guide

Ensure this combo works with your setup before ordering.

  • Bed accommodates near-flush rail mounting
  • Clearance exists for standard fifth wheel hitch
  • Available space for 40 or 70 gallon capacity footprint

Built for the Long Haul

Designed for professionals who demand reliability and extended range on the job.

Construction Site Hauling
Extended Remote Operations
Heavy Duty Towing

Full specifications

At a glance

Dimensions
40 Gallon, 70 Gallon
Warranty
See product page
Full specifications10 data points across 4 categories

Dimensions

Size Options40 Gallon, 70 Gallon
Storage Capacity6 cubic feet
Design (70 Gallon)Over the bed rail style design

Power & Performance

Operating SystemTRAX 4™ operating system
TechnologyPatented AutoTrans® technology
Fuel TransferComputer-controlled automatic fuel transfers
MonitoringTRAX 4™ app

Materials

ConstructionSee product page

Compliance & Warranty

WarrantySee product page
Returns30-day hassle-free

The Tank Vault Promise

Every product we carry is vetted for build quality and real-world performance.

Vetted QualityWe only stock tanks that meet strict performance and durability standards.
Free ShippingYour fuel tank combo ships free with no minimums or conditions.
30-Day ReturnsIf it doesn't fit your fleet, return it hassle-free within 30 days.
★★★★★
“Installed the 70 gallon on our F-350 fleet truck. The TRAX 4 system handles fuel transfer automatically — no more stopping to flip valves or watching gauges. The toolbox holds chains, binders, and recovery gear securely. Fifth wheel hitch still works fine. This is exactly the kind of equipment that pays for itself in downtime avoided.”
F
First L.Houston, TX

The Transfer Flow auxiliary fuel tank and toolbox combo is the best of both worlds, providing more fuel and secure storage for all your adventures. Choose a 40 gallon or 70 gallon size. The 70 gallon size has an over the bed rail style design.

The fuel tank and tool box combo sits nearly flush with most pickup bed rails and won’t interfere with most standard fifth wheel hitches. With 6 cubic feet of storage space and locking paddle handles, you can rest easy knowing your cargo and fuel is secure.

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

Based on the capacity of your vehicle’s main fuel tank and the capacity of the Transfer Flow fuel tank, the TRAX 4™ system will transfer fuel at predetermined fuel levels while the vehicle is in operation.

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.

Transfer Flow fuel tanks are built from ReliaSteel®, high-yield U.S. aluminized steel; and powder coated black for superior corrosion resistance and strength.

Sizes:

  • 40 Gallon – 59 inches long x 21 inches wide x 21 inches high.
  • 70 Gallon – 73 inches long x 24.5 inches wide x 27.25 inches high.

Fits:

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

FEATURES

  • Recommended for drivers who want extra fuel capacity and a safe place to store their gear.
  • TRAX 4™ computer-controlled automatic fuel transfers for worry-free operation with exclusive AutoTrans® technology.
  • Perfect for RVers, contractors, and outdoor enthusiasts.
  • Comes complete with all components needed for installation.
  • Built from ReliaSteel®, high-yield U.S. aluminized steel for superior durability and strength.
  • Powder coated black for a durable satin black finish.
  • 6 cubic ft. of storage space (Storage dimensions: 59” L × 18” W × 9 3/4” H).
  • Gas-filled shocks for easy opening and closing.
  • Stainless steel locking paddle handles.
  • Baffled to prevent fuel sloshing.
  • 6 year, unlimited mile warranty.
  • Made in the USA.

Other Tank Options:

Additional information

Size

40 Gallon, 70 Gallon

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Frequently Asked Questions

All grills ship fully assembled in heavy-duty crating. Just remove the packaging, add propane or charcoal, and cook. No tools required.
We offer free 30-day returns on all grills. If you're not completely satisfied with your purchase, contact us and we'll arrange a free pickup.
Yes — 0% interest financing is available on eligible purchases. Split into 4, 6, or 12 monthly payments with no hidden fees.
Yes. We carry a full catalog of OEM replacement parts including grates, burners, igniters, and heat shields for every brand we carry.
Absolutely. Our grills are built for all-weather use. The 304 stainless steel construction is designed to handle temperature extremes from -20°F winters to 110°F summers.
SKU: 0800116188 Categories: , , Brand:

The Tank Vault Promise

Every product we carry is vetted for build quality and real-world performance.

Vetted Quality We only stock tanks that meet strict performance and durability standards.
Free Shipping Your fuel tank combo ships free with no minimums or conditions.
30-Day Returns If it doesn't fit your fleet, return it hassle-free within 30 days.

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About transfer flow Fuel Tank Toolbox Combos

transfer flow is a trusted manufacturer of premium fuel tank toolbox combos. TankVault is an authorized dealer offering the full transfer flow lineup with free delivery, price match guarantee, and expert support.

View all transfer flow products →

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