The 2015 Ford F-350 Super Duty Dually is a heavy-duty, full-size pickup truck engineered for maximum towing and hauling performance. Powered by either a robust 6.2-liter gas V8 or a high-torque 6.7-liter Power Stroke V8 Turbo Diesel, this dual-rear-wheel powerhouse offers a maximum conventional towing capacity of up to 15,900 pounds and a fifth-wheel/gooseneck towing capacity reaching up to 26,500 pounds, supported by a maximum payload capacity of over 7,000 pounds when properly configured.
Introduction to the 2015 Ford F-350 Super Duty Dually
When heavy industry, construction, large-scale agriculture, or elite recreational towing demands absolute mechanical reliability, heavy-duty trucks serve as the backbone of modern operations. Released during the third generation of Ford’s long-running Super Duty line, the 2015 Ford F-350 Dually—featuring a dual-rear-wheel axle configuration—stands out as a watershed model. This truck bridged the gap between conventional consumer pickup trucks and commercial-grade medium-duty haulers.
Understanding the 2015 Ford F-350 dually specifications and capabilities requires looking past standard cosmetic features and examining the engineering decisions that allowed it to move massive loads safely. From its high-strength steel frame to its dual-rear-wheel stability, this platform was built to handle intense payloads. This comprehensive overview examines the technical specifications, engine options, towing limits, payload thresholds, cabin configurations, and operational realities of the 2015 F-350 Dually.
Engine Options and Powertrain Specifications
The performance of the 2015 Ford F-350 Dually is driven by two distinct powerplant choices. Each engine is paired with a heavy-duty TorqShift six-speed automatic transmission designed to handle high thermal loads and sustained heavy towing without overheating or premature wear.
The 6.2L Flex-Fuel Gas V8 Engine
For operators who prioritize lower upfront vehicle costs, simpler maintenance schedules, and traditional gasoline operation, Ford equipped the F-350 with a standard 6.2-liter two-valve SOHC V8.
- Horsepower: 385 hp at 5,500 RPM
- Torque: 405 lb-ft at 4,500 RPM
- Block/Head Material: Cast-iron block with aluminum heads
- Fuel Delivery: Sequential multi-port electronic fuel injection
While it delivers respectable performance and ample power for everyday utility work, the 6.2-liter gas engine is typically chosen by municipal fleets and utility companies that do not require the extreme low-end twisting force provided by a diesel engine.
The 6.7L Power Stroke V8 Turbo Diesel Engine
The defining engine for heavy-duty towing enthusiasts is the optional 6.7-liter Power Stroke V8 Turbo Diesel. For the 2015 model year, Ford engineers implemented a major overhaul to this engine, introducing a larger, single, dual-side-compressor turbocharger mounted directly to the exhaust manifolds in a reverse-flow layout.
- Horsepower: 440 hp at 2,800 RPM
- Torque: 860 lb-ft at 1,600 RPM
- Block/Head Material: Compact graphite iron (CGI) block with aluminum heads
- Fuel Delivery: High-pressure common-rail direct injection (up to 30,000 psi)
This substantial torque figure, delivered exceptionally low in the RPM band, transforms the F-350 Dually into an effortless long-haul towing machine. The engine utilizes an exhaust brake system, which uses the variable-geometry turbocharger to create backpressure, slowing the vehicle down under heavy loads without wearing out the mechanical disc brakes.
Towing Capabilities and Weight Ratings
The primary reason buyers select a dual-rear-wheel (DRW) configuration over a single-rear-wheel (SRW) truck is the dramatic increase in lateral stability and payload support. Four rear tires distribute the weight of heavy tongue loads and fifth-wheel pins across a wider contact patch, drastically reducing trailer sway in high winds or during emergency maneuvers.
Conventional Towing vs. Fifth-Wheel/Gooseneck Towing
Towing limits vary based on the cab style (Regular Cab, SuperCab, Crew Cab), bed length, four-wheel drive (4x4) versus rear-wheel drive (4x2) systems, and axle gear ratios (such as 3.73, 4.10, or 4.30 electronic locking differentials).
- Maximum Conventional Towing: Up to 15,900 pounds when properly equipped with a weight-distributing hitch and the 6.7L diesel engine.
- Maximum Fifth-Wheel/Gooseneck Towing: Up to 26,500 pounds for regular cab configurations equipped with the diesel engine and appropriate rear axle ratio.
Gross Vehicle Weight Rating (GVWR) and Payload
The Gross Vehicle Weight Rating (GVWR) of the 2015 Ford F-350 Dually typically tops out at 14,000 pounds. Payload capacity—the total weight of passengers, cargo, and tongue weight resting in the truck bed—ranges from roughly 4,000 pounds up to over 7,000 pounds depending on the specific trim and powertrain weight. Gas-powered trucks generally offer a slightly higher maximum payload capacity than diesel-powered trucks because the heavy cast-iron diesel engine consumes more of the truck's total allowable weight capacity.
| Engine Type | Drive Configuration | Max Conventional Towing | Max Fifth-Wheel/Gooseneck Towing | Max Payload Capacity |
|---|---|---|---|---|
| 6.2L Gas V8 | 4x2 Regular Cab | 12,500 lbs | 15,600 lbs | 7,260 lbs |
| 6.2L Gas V8 | 4x4 Crew Cab | 12,100 lbs | 12,500 lbs | 5,550 lbs |
| 6.7L Diesel V8 | 4x2 Regular Cab | 15,900 lbs | 26,500 lbs | 4,370 lbs |
| 6.7L Diesel V8 | 4x4 Crew Cab | 15,900 lbs | 22,800 lbs | 3,920 lbs |
Chassis, Suspension, and Braking Architecture
Behind the towing numbers is a robust structural design built to handle heavy working conditions. The foundation consists of a fully boxed front section and a C-channel rear section constructed from high-strength steel, minimizing frame flex when crossing uneven terrain under heavy loads.
Suspension System
- Front Suspension: Solid twin-coil Monobeam axle with gas-pressurized shock absorbers and a heavy-duty stabilizer bar. Four-wheel-drive models incorporate rugged radius arms to locate the axle precisely.
- Rear Suspension: Hotchkiss-type non-independent live axle utilizing heavy-duty multi-leaf springs designed to sag minimally under massive tongue weights.
Braking and Steering Systems
Stopping a combined vehicle and trailer weight exceeding 30,000 pounds requires substantial braking power. The 2015 F-350 Dually features massive four-wheel vented disc brakes paired with an anti-lock braking system (ABS). The hydro-boost braking system relies on hydraulic pressure from the power steering pump rather than engine vacuum, ensuring firm, consistent pedal feel even under heavy braking. Integrated Trailer Brake Controllers (TBC) came standard or optional depending on the trim package, providing seamless proportional activation of electric trailer brakes.
Trim Levels, Cab Configurations, and Interior Comfort
The 2015 Ford F-350 Dually was offered in five distinct trim levels, allowing buyers to configure the truck as a basic work vehicle or a luxury touring machine.
- XL: The utilitarian base model, featuring vinyl seating, black bumpers, manual windows and locks on lower configurations, and essential vinyl or heavy-duty rubber flooring designed for easy wash-out.
- XLT: A popular mid-tier trim that adds cloth seating, power windows and door locks, cruise control, carpeted flooring, and the Ford SYNC voice-activated infotainment system.
- Lariat: Moving into luxury territory, the Lariat introduces leather-trimmed heated and cooled front bucket seats, dual-zone automatic climate control, a premium Sony audio system, and MyFord Touch with an 8-inch touchscreen display.
- King Ranch: Emphasizing Western-themed luxury, this trim features unique Mesa Brown premium leather upholstery, special wood-grain interior accents, remote start, and power-adjustable pedals.
- Platinum: The flagship trim offering ultimate comfort, featuring genuine wood interior accents, unique multi-contour leather seats, a heated steering wheel, chrome exterior highlights, and a standard tailgate step.
Cab configurations included the Regular Cab (two-door, seating up to three), SuperCab (extended cab with rear-opening access doors, seating up to six), and Crew Cab (four full-size doors with expansive rear legroom, seating up to six).
Operational Considerations and Real-World Limitations
While the capabilities of the 2015 Ford F-350 Dually are impressive, operating a dual-rear-wheel heavy-duty truck involves distinct trade-offs that prospective buyers and current operators must navigate.
Daily Driving and Maneuverability
The physical footprint of an F-350 Dually—especially in Crew Cab, long-bed configurations—makes urban driving and tight parking spaces challenging. The wide rear stance requires constant attention to clearance, particularly when navigating narrow drive-thrus, construction zones, or multi-story parking garages. Turning radiuses are wide, requiring multiple-point turns in confined spaces.
Fuel Economy and Maintenance Costs
Because heavy-duty trucks exceeding 10,000 pounds GVWR are exempt from official EPA fuel economy testing, window stickers do not display miles-per-gallon (MPG) estimates. However, real-world testing typically shows the 6.2L gas V8 returning single-digit fuel economy under heavy towing, while the 6.7L diesel typically achieves between 9 and 14 MPG depending on cargo weight and highway speeds. Maintenance costs for the diesel engine—including high-capacity fuel filters, diesel exhaust fluid (DEF) consumption, and complex emission control systems like the Diesel Particulate Filter (DPF)—are notably higher than standard gasoline powertrains.
Frequently Asked Questions
What is the maximum towing capacity of a 2015 Ford F-350 Dually?
When equipped with the 6.7-liter Power Stroke V8 Turbo Diesel and a proper fifth-wheel or gooseneck hitch configuration, the maximum towing capacity reaches up to 26,500 pounds. Conventional trailer towing tops out at 15,900 pounds due to factory hitch receiver ratings.
Can the 2015 Ford F-350 Dually run on biodiesel?
Yes, the 6.7-liter Power Stroke diesel engine in the 2015 model year is engineered to run on biodiesel blends up to B20 (20% biodiesel and 80% petroleum diesel), provided the fuel meets standard commercial fuel quality specifications.
What is the difference between an F-250, F-350 SRW, and F-350 Dually?
The F-250 and F-350 Single Rear Wheel (SRW) models utilize two rear tires and are generally restricted by lower payload ratings and GVWR limits. The F-350 Dually (DRW) adds dual wheels on the rear axle, significantly increasing the truck's lateral stability, rear axle weight capacity, and maximum fifth-wheel towing limits.
Does the 2015 F-350 diesel require Diesel Exhaust Fluid (DEF)?
Yes, the 6.7L Power Stroke diesel engine uses a Selective Catalytic Reduction (SCR) system that requires Diesel Exhaust Fluid to reduce nitrogen oxide emissions and comply with federal environmental regulations.
How do I verify the exact towing capacity of a specific 2015 F-350 Dually?
Towing capacities vary widely depending on cab style, bed length, 4x2 or 4x4 drivetrain, and rear axle gear ratio. The most accurate method is to check the Safety Compliance Certification Label located on the driver-side door jamb and consult the official Ford towing guide matching the truck's specific VIN and build sheet.
Conclusion and Next Actions
The 2015 Ford F-350 Super Duty Dually remains a formidable option for heavy-duty hauling and towing. When evaluating a pre-owned model or maintaining an existing vehicle, prospective owners should thoroughly inspect the service history—paying particular attention to transmission fluid changes, fuel system cleanliness, and emissions component health on diesel models. Always cross-reference the vehicle identification number (VIN) with the door jamb GVWR and axle code to ensure the truck matches your specific hauling requirements.
