atta tank|SKU:AT50W-var-51018-305381

ATTA Diesel Wedge Auxiliary Fuel Tank — .125 Aluminum, 50 to 94 Gallon

Custom Wedge Design for Full-Size Diesel Trucks

Custom wedge contour — Fits your truck bed's factory lines
Three capacity options — 50, 66, or 94 gallons available
Heavy-gauge aluminum build — .125 gauge with full internal baffling
Two fuel transfer systems — Freedom Fill or Push N Fuel System
Broad truck compatibility — Fits Ford, Dodge, and GM diesels
  • Free Shipping -- LTL delivery to your location — ships free
  • Free Pre-offer Spec Review -- We verify truck fitment and fuel system compatibility before ordering

Price range: $1,089.00 through $1,444.00

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

  • ATTA aluminum wedge tank (selected capacity)
  • Freedom Fill or Push N Fuel System (selected at checkout)
ATTA Diesel Wedge Auxiliary Fuel Tank
ATTA Diesel Wedge Auxiliary Fuel Tank — .125 Aluminum, 50 to 94 Gallon
$1,089.00 – $1,444.00Price range: $1,089.00 through $1,444.00

Custom Wedge Design for Full-Size Diesel Trucks

The ATTA Aluminum wedge auxiliary tank delivers a factory-style contour that fits your long or short bed full-size diesel truck without sacrificing capacity. Built-to-spec from heavy-gauge .125 aluminum and fully baffled to control fuel surge, this tank is field-proven for daily commercial use. Available in 50, 66, and 94 gallon capacities, it transfers diesel directly into your factory tank via your choice of the Freedom Fill Fuel System or the Push N Fuel System. Ships free. Financing available through Affirm starting at $91/month.

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Heavy-Gauge Aluminum
Fully Baffled Design
Short & Long Bed Fit
Two Transfer Options
50–94 Gal
Available Capacities
.125
Aluminum Gauge
60"
Tank Length (All Sizes)
Spec'd Correctly for Your Truck Bed Before It Ships

Spec'd Correctly for Your Truck Bed Before It Ships

We verify your truck bed dimensions, fuel system compatibility, and transfer pump requirements before your order ships. The enemy for fleet operators buying auxiliary tanks is the wrong-size tank that doesn't fit the bed contour, or a fuel transfer system mismatched to the vehicle's ECM — both costing downtime and return freight. Our pre-offer spec review cross-references your truck make, model year, bed length, and fuel system choice before the tank leaves the floor. If the 94-gallon dual-fill configuration won't clear your short bed, we flag it. If the Freedom Fill system needs different programming for your model year, we confirm it. No guessing.

Full Baffling Controls Fuel Surge on Rough Terrain

Full Baffling Controls Fuel Surge on Rough Terrain

ATTA constructs these wedge tanks from .125 gauge aluminum with full internal baffling — critical for diesel operators who drive varied terrain. Unbaffled tanks allow fuel to shift aggressively during cornering, braking, and grade changes, which destabilizes the rear axle and creates unpredictable handling at load. Full baffling compartmentalizes the fuel mass, keeping weight distribution consistent whether you're running at capacity or down to a quarter tank. The .125 gauge aluminum construction provides industrial-grade corrosion resistance without the weight penalty of steel, and the wedge contour maintains a low profile that preserves bed utility and rear visibility.

Two Fuel Transfer Systems Matched to Your Setup

Two Fuel Transfer Systems Matched to Your Setup

Every ATTA wedge tank requires either the Freedom Fill Fuel System or the Push N Fuel System — both designed to transfer diesel from the auxiliary tank into your factory tank. Freedom Fill operates with vehicle-specific programming that matches your make and model year, automating the transfer process based on your factory tank's fuel level. Push N Fuel provides manual on-demand transfer for operators who prefer direct control. The 94-gallon configuration includes dual fill necks with matching locking fuel caps for secure, balanced filling. Selecting the correct system at checkout is mandatory — and if you're unsure which matches your application, our pre-offer review covers it.

Compatibility Check

Verify your truck bed and fuel system before ordering.

  • Truck bed is at least 60 inches in length
  • Full-size diesel truck: Ford, Dodge, or GM
  • Fuel system selection required at checkout: Freedom Fill or Push N Fuel

Built for the Job

Designed for professionals who need extended range without sacrificing bed utility.

Long-Haul Fleet Operations
Construction Site Fueling
Agricultural Field Work

Full specifications

At a glance

Warranty
See product page
Full specifications10 data points across 4 categories

Dimensions

50 Gallon18 inches tall x 14 inches wide x 60 inches long
66 Gallon18 inches tall x 18 inches wide x 60 inches long
94 Gallon18 inches tall x 24 inches wide x 60 inches long

Power & Performance

Fuel Transfer SystemFreedom Fill Fuel System or Push N Fuel System (required)
Fill Neck (50 gal)Single fill neck / driver's side
Fill Neck (66 gal)Single fill neck / driver's side
Fill Neck (94 gal)Duel fill neck / matching locking fuel caps

Materials

Construction.125 gauge aluminum
Internal StructureFully baffled

Compliance & Warranty

Documentation & WarrantySee product page

The Tank Vault Promise

Every tank we sell is vetted, documented, and backed by real support.

Free Compliance DocumentationAll tank orders include available manufacturer documentation — no chasing the vendor afterward.
Free ShippingLTL delivery to your site. Call for liftgate or job-site delivery options.
30-Day GuaranteeIf it doesn't meet your spec sheet or arrives damaged, we resolve it immediately — no runaround.
★★★★★
“Fleet of eight diesel trucks, all running long-bed Fords. Went with the 66-gallon wedge and Freedom Fill on each one. The pre-offer review caught that two of our trucks were a different model year and needed separate programming. Would have been a real problem if those showed up with the wrong setup. Tanks fit clean, fuel transfer works as advertised, and the baffling makes a noticeable difference on rough job site roads.”
F
First L.Odessa, TX

ATTA Aluminum standard wedge tanks give you more of the custom look compared to a standard rectangular tank. The standard wedge auxiliary tank is designed for a long or short bed full size diesel truck.

Available sizes start at 50 gallons, 66 gallons, and 94 gallons.

Choose the Freedom Fill Fuel System or the Push N Fuel System to transfer diesel fuel directly into your factory tank. 

Note: You are required to choose the Freedom Fill Fuel System or the Push N Fuel System when purchasing a Below Bed Rail Diesel Auxiliary Tank.

If you choose the Freedom Fill Fuel System at checkout, you also need to select your vehicle make and model year. This allows the Freedom Fill system to be programmed to match the correct vehicle.

Available Sizes

  • 50 gallon: 18 inches tall x 14 inches wide x 60 inches long
  • 66 gallon: 18 inches tall x 18 inches wide x 60 inches long
  • 94 gallon: 18 inches tall x 24 inches wide x 60 inches long

Material

  • .125 gauge aluminum / fully baffled

Fill Neck

  • 50 gallon: single fill neck / driver’s side
  • 66 gallon: single fill neck / driver’s side
  • 94 gallon: duel fill neck / matching locking fuel caps

Fuel Type

  • Diesel fuel only

Bed Type

  • 50 gallon: Short & Long bed Ford, Dodge, and GM.
  • 66 gallon: Short & Long bed Ford, Dodge, and GM.
  • 94 gallon: Long bed Ford, Dodge, and GM.

Tank must be notched for short bed Dodge. Tank may interfere with Dodge short bed with factory puck system.

Note

Add 2.5” to the height of the tank for the fill neck/cap and sending unit cover. Add 1.5” (front & rear) to the width of the tank for the hold down tabs.

Auxiliary Fuel Systems

Choose either the Freedom Fuel System or the Push N’ Fuel System.

Freedom Fill Auxiliary System

The Freedom Fill Auxiliary System is the most popular fuel system option. It is a complete installation kit and comes with everything you need to install an auxiliary fuel tank to your truck.

The Freedom Fill Auxiliary System is specifically designed to be used in conjunction with an auxiliary tank manufactured by Aluminum Tank & Tank Accessories, Inc. for current year model Dodge, Ford, and GM / Chevrolet diesel trucks.

The Freedom Fill Auxiliary System is a computerized fuel system. When the factory tank reaches approximately 1/2 a tank, an auxiliary computer module will activate the fuel pump and begin transferring fuel from the auxiliary tank and will refill the factory tank to approximately 3/4 of a tank.

The system is all automatic for peace of mind and ease of use. The pump will not turn on when the auxiliary tank is empty.

Push N Fuel Auxiliary System

The Push N Fuel Auxiliary System is an economic fuel system. Designed specifically for use in an auxiliary tank manufactured by Aluminum Tank & Tank Accessories, Inc. for use in only in Dodge, Ford, and GM / Chevrolet diesel trucks.

The Push N Fuel System uses a momentary rocker switch mounted to the dash. The operator must push and hold the switch to activate the heavy duty rotary vain pump and hold the switch to activate the heavy duty rotary vain pump to begin the transfer of fuel from the auxiliary tank to the factory tank. When the switch is released, the pump will shut off.

Other Auxiliary Tank Options:

Additional information

Size

50 Gallon, 66 Gallon, 94 Gallon

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Frequently Asked Questions

Freedom Fill automates diesel transfer based on your factory tank's fuel level and requires vehicle-specific programming matched to your make and model year. Push N Fuel gives you manual on-demand transfer for direct control. If your operation runs consistent routes where automated refilling reduces stops, Freedom Fill is the stronger choice. If you prefer to manage transfer timing yourself — or if your vehicle's ECM has aftermarket tuning that may interfere with automated systems — Push N Fuel is the safer pick. Not sure? Contact us before ordering and we'll walk through your specific setup.
The 50-gallon and 66-gallon wedge tanks fit both short bed and long bed full-size Ford, Dodge, and GM diesel trucks. The 94-gallon tank is designed for long bed applications only — its 24-inch width won't clear a short bed's wheel well contour. All three sizes share a 60-inch length and 18-inch height. If you're running a short bed, the 50-gallon gives you 14 inches of width while the 66-gallon fills to 18 inches. Confirm your bed length and measure your available width before ordering — or contact us and we'll verify fitment for your specific truck.
ATTA wedge auxiliary tanks are designed for below-bed-rail diesel fuel storage on full-size trucks. Legal requirements for auxiliary fuel tanks vary by state — some jurisdictions treat them as cargo tanks under DOT regulations, while others regulate them under state fire codes. The tank itself is constructed from .125 gauge aluminum with full baffling and is intended for diesel fuel only. Tank Vault does not provide legal compliance opinions for state-specific highway regulations. We recommend confirming your local requirements with your state DOT or fire marshal's office before installation. We can help you spec the correct tank and fuel system for your application.
Lead times vary by capacity and fuel system selection. Standard configurations typically ship within a reasonable production window. Freedom Fill systems require vehicle-specific programming, so including your correct make and model year at checkout prevents delays — if the programming doesn't match your ECM, the tank ships wrong and you're waiting on a return. If you have a firm deadline — seasonal operations, a new truck going into service, or a job site start date — contact us before ordering. We'll confirm current production timing for your specific size and fuel system combination so you can plan accordingly.
No. ATTA wedge auxiliary tanks are designed for diesel fuel only. Gasoline requires different material compatibility, venting specifications, and regulatory compliance than diesel. Running gasoline through a diesel-rated aluminum tank creates a safety and compliance risk that we will not support. If your operation requires gasoline auxiliary storage, contact us — we can point you toward the correct product category for your application. Never modify a diesel-rated tank for gasoline use.
That's exactly why we offer free pre-offer spec review. Tell us your truck make, model year, bed length, and intended fuel system before you order — we'll confirm the correct capacity and configuration. If a tank arrives and doesn't fit due to an error on our end, we resolve it. Our 30-day return policy covers uninstalled tanks in original packaging. However, returns on correctly-spec'd tanks ordered without pre-offer review incur restocking logistics. The mistake that costs the most is the one you could have prevented — contact us first.
SKU: AT50W Categories: , , Brand:

The Tank Vault Promise

Every tank we sell is vetted, documented, and backed by real support.

Free Compliance Documentation All tank orders include available manufacturer documentation — no chasing the vendor afterward.
Free Shipping LTL delivery to your site. Call for liftgate or job-site delivery options.
30-Day Guarantee If it doesn't meet your spec sheet or arrives damaged, we resolve it immediately — no runaround.

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About atta tank Diesel Transfer Tanks

atta tank is a trusted manufacturer of premium diesel transfer tanks. TankVault is an authorized dealer offering the full atta tank lineup with free delivery, price match guarantee, and expert support.

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