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2021 Ford F-350 Super Duty

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By Research the Car 4 min read

The 2021 Ford F-350 Super Duty is a heavy-duty pickup truck known for its immense towing and hauling capabilities. Engine options include the 6.2L Boss SOHC 2-Valve Flex Fuel V8 (385 hp, 430 lb-ft of torque), the 7.3L Godzilla OHV 2-Valve PFI Gas V8 (430 hp, 475 lb-ft of torque), and the 6.7L Power Stroke V8 Turbo Diesel (475 hp, 1,050 lb-ft of torque). The 6.2L V8 is paired with a TorqShift 6-speed automatic transmission, while both the 7.3L V8 and 6.7L diesel are paired with the TorqShift 10-speed automatic. Owners appreciate the truck’s power, capability, and updated technology. However, some common complaints revolve around ride quality, particularly when unladen, and the sheer size of the vehicle can make it difficult to maneuver in tight spaces. Reliability issues, though not widespread, also contribute to owner dissatisfaction.

Engine

6.2L Boss SOHC 2-Valve Flex Fuel V8

No Issues Found

7.3L Godzilla OHV 2-Valve PFI Gas V8

  • Valve Train Noise
    • Description/Symptoms: Some owners report excessive ticking or knocking noises emanating from the engine, particularly at idle or low speeds. This is sometimes attributed to the valve train or lifters.
    • Solution: Diagnosis can involve inspecting valve lash, lifters, and other valve train components. Replacement of faulty parts is usually required.
    • Estimated Cost to Fix: $500 - $2,000+ depending on the extent of the damage.
    • Recalls: None Found

6.7L Power Stroke V8 Turbo Diesel

  • Glow Plug Failure
    • Description/Symptoms: Difficulty starting in cold weather, rough idling, and black smoke upon startup. This often results in a check engine light.
    • Solution: Replacing faulty glow plugs. It’s often recommended to replace all glow plugs at the same time.
    • Estimated Cost to Fix: $300 - $800+
    • Recalls: None Found
  • CP4 Fuel Pump Failure
    • Description/Symptoms: The CP4 high-pressure fuel pump is known to be more susceptible to failure when contaminated fuel is used. Failure can cause metallic debris to circulate through the entire fuel system. Symptoms can include loss of power, difficulty starting, and unusual engine noises.
    • Solution: Replacement of the CP4 pump and potentially the entire fuel system, including injectors, fuel lines, and fuel tank.
    • Estimated Cost to Fix: $8,000 - $12,000+
    • Recalls: None Found

Transmission

TorqShift 6-Speed Automatic (with 6.2L V8)

No Issues Found

TorqShift 10-Speed Automatic (with 7.3L V8 and 6.7L Diesel)

  • Harsh/Erratic Shifting
    • Description/Symptoms: Some owners report harsh or erratic shifting, especially during low-speed driving. This can manifest as noticeable “clunking” sounds and jerky movements.
    • Solution: A software update may sometimes resolve the issue. In other cases, valve body replacement or transmission rebuild may be necessary.
    • Estimated Cost to Fix: $100 (software update) - $4,000+ (transmission rebuild)
    • Recalls: None Found

Suspension

  • “Death Wobble”
    • Description/Symptoms: A violent shaking of the front end, especially at highway speeds after hitting a bump or imperfection in the road.
    • Solution: The solution can be multi-faceted, often involving replacing or upgrading steering stabilizers, ball joints, tie rod ends, and track bars. Proper wheel alignment and tire balancing are also critical.
    • Estimated Cost to Fix: $500 - $2,000+
    • Recalls: None Found

Electrical

  • Infotainment System Freezing/Crashing
    • Description/Symptoms: The SYNC 3 or SYNC 4 infotainment system can freeze, crash, or become unresponsive. This may affect navigation, audio, and other system functions.
    • Solution: A software update can sometimes resolve the issue. In some cases, the APIM (Accessory Protocol Interface Module) may need to be replaced.
    • Estimated Cost to Fix: $0 (software update) - $800+ (APIM replacement)
    • Recalls: None Found
  • Backup Camera Malfunction
    • Description/Symptoms: The backup camera image may be distorted, flicker, or fail to display altogether.
    • Solution: Check the camera connection for corrosion or damage, and repair the wiring if needed. If the camera itself is faulty, replacement is necessary.
    • Estimated Cost to Fix: $100 - $500+
    • Recalls: None Found

Exterior

  • Tailgate Issues
    • Description/Symptoms: Tailgate may be hard to open or close.
    • Solution: Lubricate all moving parts of the tailgate. You may need to replace any parts.
    • Estimated Cost to Fix: $200 - $500+
    • Recalls: 22V-825

Interior

  • Seat Heater Failure
    • Description/Symptoms: Seat heaters may fail to function, or may only partially heat.
    • Solution: Diagnosis involves checking the heating element, wiring, and control module. Replacement of faulty components is required.
    • Estimated Cost to Fix: $200 - $600+
    • Recalls: None Found
  • HVAC Blower Motor Issues
    • Description/Symptoms: The HVAC blower motor may stop working, produce unusual noises, or operate intermittently.
    • Solution: Replacement of the blower motor or blower motor resistor is typically required.
    • Estimated Cost to Fix: $150 - $400+
    • Recalls: None Found

Summary

The 2021 Ford F-350 Super Duty, while a capable truck, has a range of potential issues. While many of the problems are relatively minor and can be addressed with software updates or minor repairs, some more serious issues like the CP4 fuel pump failure in the 6.7L diesel can result in very high repair costs. The severity and cost of these issues vary, but it’s important for potential buyers to be aware of these potential problems. It is recommended that owners perform regular maintenance to keep the vehicle running smoothly.

Ford, F-350 Super Duty
Ford F-350 Super Duty 2021
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