FORD Automatic Transmission 400.FD8O08 95K

( Manufacturer Part Number: F350SD ), ( Conditions Options: 6.4 ), ( Genuine Oem: Yes ), ( Ipn: 400.fd8o08 ), ( Performance Part: No ), ( Items Included: Torque Converter ), ( Manufacturer Warranty: 6 Month ), ( Type: Automatic Transmission )

Review FORD Automatic Transmission Speed 95k Miles fits F350SD F450SD RWD 400 2008

The **2008 Ford F-450 Super Duty FD8 (VIN: 1FTDF400XD8008000)** with a **7.3L Power Stroke diesel engine (FD8O08)** and **6R140 six-speed automatic transmission** represents a robust and dependable heavy-duty workhorse designed for demanding commercial, industrial, and off-road applications. Engineered to deliver unmatched towing capacity, payload capability, and durability, this model stands as a testament to Ford s legacy of building trucks built to last. The **7.3L Power Stroke diesel** is a legendary engine known for its reliability, torque output, and longevity, producing a substantial **325 horsepower and 600 lb-ft of torque**, making it ideal for hauling heavy loads, pulling trailers, or powering specialized equipment with ease. Its **common-rail direct-injection fuel system** ensures efficient combustion, while the **turbocharged intercooled design** maximizes airflow for consistent performance even under extreme conditions. The **6R140 automatic transmission**, paired with a **rear-wheel-drive (RWD) configuration**, offers smooth shifting and precise control, whether navigating rough terrain or maintaining steady highway speeds. This transmission is engineered to handle the high torque demands of the diesel engine, providing optimal gear ratios for both towing and payload applications.

The **2008 F-450 Super Duty** is built on Ford s **F-450/F-550 platform**, featuring a **heavy-duty frame** with **13-gauge side rails** and **11-gauge crossmembers**, ensuring structural integrity even when carrying maximum payloads or towing oversized loads. The **spider frame design** enhances rigidity, reducing flex under heavy loads, while the **multi-link rear suspension** improves stability and handling, particularly when carrying uneven or heavy cargo. Equipped with **15-inch wheels** (standard) and **heavy-duty 35-inch tires**, this truck is engineered for durability and traction, whether on pavement, gravel, or off-road conditions. The **manual rear axle ratio of 3.73:1** (common on this model) further enhances its towing prowess, allowing it to pull **up to 22,000 pounds** when properly equipped with a suitable trailer hitch and towing package.

Inside, the **2008 F-450 Super Duty** offers a utilitarian yet functional cabin, with options for **manual or automatic climate control**, **power-adjustable seats**, and **heavy-duty steering wheel** for improved driver comfort and control. While not designed for luxury, the cabin is built to withstand the rigors of daily commercial use, with **durable materials** and **easy-to-clean surfaces**. The **automatic transmission** provides a more comfortable driving experience compared to manual alternatives, with smooth shifts and adaptive torque management to prevent excessive strain on the drivetrain. The **RWD configuration** ensures that power is directed to the rear wheels, enhancing stability and control, particularly when driving on uneven terrain or when carrying heavy loads. This setup is particularly advantageous for applications requiring precise maneuverability, such as construction sites, agricultural work, or specialized equipment transport.

Under the hood, the **FD8O08 engine** is a workhorse built for reliability, featuring **cast-iron block and head construction** for durability, along with **intercooled turbocharging** to maximize airflow and power output. The **electronic engine management system** optimizes fuel delivery and ignition timing, reducing emissions while maintaining performance. The **diesel exhaust fluid (DEF) system** (if equipped) further ensures compliance with emissions regulations, making this truck suitable for commercial fleets operating in environmentally regulated areas. The **heavy-duty cooling system**, including a **large radiator and electric cooling fan**, prevents overheating even during prolonged operation, while the **durable fuel system** minimizes the risk of leaks or failures in demanding environments.

The **2008 Ford F-450 Super Duty FD8O08** is a truck built for those who demand performance, durability, and versatility in their work. Whether used for **towing heavy trailers, hauling construction materials, powering agricultural equipment, or serving as a mobile workshop**, this model delivers the power and reliability needed to get the job done efficiently. With its **proven 7.3L Power Stroke engine, six-speed automatic transmission, and reinforced chassis**, it stands as a dependable asset for businesses and professionals who rely on their trucks to perform under pressure. While it may lack modern infotainment or advanced driver-assistance features, its **raw capability, rugged construction, and time-tested engineering** make it a sought-after choice for those who prioritize function over frivolity. For buyers seeking a **heavy-duty work truck** that can handle the toughest tasks with ease, the **2008 Ford F-450 Super Duty FD8O08** remains a compelling and capable option.

### **Pros and Cons of Buying a 2008 Ford F-450 Super Duty (FD8008) with Automatic Transmission (RWD)**

#### **Pros**

1. **Heavy-Duty Capability** The F-450 is designed for serious work, including towing heavy loads (up to 24,000 lbs with proper equipment) and hauling large payloads. Its robust frame and suspension make it ideal for construction, agriculture, or commercial use.

2. **Powerful Engine Options** The 2008 model typically came with a **7.3L Power Stroke V8 diesel** (325 hp, 650 lb-ft torque) or a **6.0L Triton V8 gas engine** (360 hp). The diesel is particularly reliable for high-mileage, heavy-duty applications.

3. **Durable Transmission** The **6R140 automatic transmission** (or similar) is a robust unit designed for heavy loads, though it requires proper maintenance to last.

4. **Rear-Wheel Drive (RWD) Advantages** RWD provides better traction in off-road or slippery conditions compared to AWD/FWD, making it suitable for construction sites or rough terrain.

5. **Available Crew Cab & Extended Cabs** The F-450 offers multiple cab configurations, including crew cabs, which provide better seating and workspace for multiple passengers.

6. **Aftermarket & Customization Potential** Ford s large following means extensive aftermarket support for upgrades, including lift kits, exhaust systems, and performance modifications.

7. **Resale Value (Compared to Similar Trucks)** While not as high as newer models, the F-450 holds value better than some competitors due to its reputation for durability.

---

#### **Cons**

1. **High Maintenance Costs** Diesel engines (especially the 7.3L Power Stroke) require frequent oil changes, fuel filter replacements, and potential EGR/DPF issues. Gas engines may suffer from timing chain wear or transmission fluid degradation over time.

2. **Poor Fuel Economy** The F-450 is not fuel-efficient, averaging around **8-12 MPG** in highway conditions, making it expensive to operate for daily driving.

3. **Rough Ride & Comfort** The heavy-duty suspension is designed for work, not comfort. Road noise, vibration, and a stiff ride can make long highway trips uncomfortable.

4. **Transmission Reliability Concerns** While the 6R140 is durable, it can be finicky with shifting issues if not properly maintained. Some owners report delayed engagement or rough upshifts.

5. **Outdated Technology** The 2008 model lacks modern features like advanced driver aids, Bluetooth, or fuel-efficient engine options. The infotainment system (if equipped) may be basic or non-existent.

6. **High Purchase & Operating Costs** Used F-450s in good condition can still be expensive, and insurance, fuel, and repairs add up quickly.

7. **RWD Limitations** While RWD offers traction benefits, it lacks the versatility of AWD for snowy or muddy conditions, which could be a drawback in certain climates.

8. **Potential Electrical Issues** Older Ford trucks, including the F-450, can develop electrical gremlins, such as failing sensors, starter problems, or wiring faults.

---

### **Ending Conclusion**

The **2008 Ford F-450 Super Duty (FD8008) with automatic transmission and RWD** is a **powerful, work-ready truck** best suited for **heavy-duty towing, hauling, or commercial use** where durability and payload capacity are priorities. However, it comes with **high maintenance demands, poor fuel efficiency, and an outdated ride**, making it less ideal for daily driving or those seeking modern comforts.

If you **need a reliable, high-torque workhorse** and are prepared for **regular upkeep**, this truck can be a great investment. However, if **fuel economy, comfort, or modern features** are important, consider a newer model or a different truck class (e.g., a Ram 3500 or Chevy 3500HD).

### **Recommendation**

- **Buy if:** You require extreme towing/payload capacity, plan to use it primarily for work, and can afford maintenance costs.

- **Avoid if:** You need a truck for daily commuting, want better fuel efficiency, or prefer modern tech and comfort.

- **Consider alternatives:** A **used 2010 Ford F-450 with a 6.7L Power Stroke** (if available) offers better fuel economy and reliability, or a **Ram 3500 or Chevy 3500HD** for similar capabilities with different trade-offs.

Always **get a pre-purchase inspection** and **check service records** before buying to ensure the transmission, engine, and suspension are in good condition.

Details:

Please verify the transmission type in Verify Vehicle Information section below. You are looking at a used OEM transmission pulled from the vehicle shown below. All automatic transmissions include the torque converter. F450SD, 6.4, 5 SPD AT RWD, 5R110W 9/01.

We cover the cost of return unless part was ordered incorrectly. 4x4 Transmissions will not include the transfer case. Engine must be inspected in the vehicle for ANY warranty coverage. Manual transmissions will not include any part of the clutch assembly.

Once sold the transmission is decreased, steam cleaned and goes through its final quality control inspection. Warranty does not include any labor or towing.

specifications autotransmissionsgo:

• for models: F350sd, F450sd, Rwd, 400
• for makes: Ford
• for years: 2008
• mpn: F350sd
• conditions options: 6.4
• genuine oem: Yes
• ipn: 400.fd8o08
• performance part: No
• items included: Torque Converter
• manufacturer warranty: 6 Month
• type: Automatic Transmission

general autotransmissionsgo:

• condition: Used
• Car Truck Parts Accessories > Transmission Drivetrain > Automatic Transmission

seller autotransmissionsgo:

• city: Phoenix, Arizona
• rating: 99.7%
• # reviews: 3199

returns autotransmissionsgo:

• time: 60 Days
• paid by: Seller
• policy: Returns Accepted

offer autotransmissionsgo:

• started: February 13, 2026
• sold: 0
• availability: In Stock
• best offers: True
• options: Ship-to-home
• quantity: 1

payments autotransmissionsgo:

• credit card: Diners-club
• other
• wallet: Paypal

shipping autotransmissionsgo:

• service: Flat Rate Freight
• type: Fixed
• cost: $0.00
• class: Freight

Ford F350SD Is Similar To:

• 05-06 FORD E250 REBUILT AUTOMATIC TRANSMISSION 4R75W 6 MONTHS WARRANTY Core req (16.9% similar) Core return is required...(April 13th, 2014)
• 05 Ford Crown Vic Automatic (33.7% similar) Adjust throttle position sensor cable. Pre-installation requirements: replace all seals. Transmission installation procedures: prior to of your used we require these steps be taken for warranty valid. Engines are guaranteed against knocking and excessive smoking. Clear all transmission computer ...(January 7th, 2018)
• 05 Ford Expedition Automatic Transmission (52.2% similar) Replace thermostat gasket. 4L, 3V, 4X4 warranty guarantee orthodox auto co. Replace oil pan gasket and rear main seal. Flush cooling system and re-fill. Adjust throttle position sensor cable. If needed replace timing gears, chains or belts gaskets. Install new filter kit. Pre-installation ...(September 25th, 2017)
• 09 Ford Crown Vic Automatic (33.7% similar) Replace valve cover gaskets. Install new filter kit. This engine comes with a 30 day part only warranty. Replace thermostat gasket. Replace oil pan gasket and rear main seal. Clear all transmission computer codes prior to starting or operating vehicle. Adjust throttle position sensor cable. Pre-...(January 7th, 2018)
• Automatic 100605 Ford Taurus Transmission 02 01 03 (40.3% similar) 0,FLR this part will fit these makes and model's with these options sable...(December 27th, 2014)
• TRANSMISSION FORD F150 PICKUP 1011826 07 08 4.2L AT 112K (18.5% similar) This is a parts replacement warranty only. Our transmissions come with a 120 day parts only warranty...(March 16th, 2014)
• Escape Mazda 03 Automatic 101819 3.0l 04 4x2 Ford 3l8pga Transmission Tribute (37.1% similar) After install, change transmission fluid at proper intervals in accordance with vehicle manufacturer guidelines. 4X2 Mazda tribute. Replace or flush cooler and lines in accordance with the vehicle manufacturer guidelines, including any current technical service bulletins that apply. Daytime phone ...(November 18th, 2014)
• 00 99 102443 Transmission 2.5l Automatic Ford Ranger 01 (38.8% similar) 5,AT this part will fit these makes and model's with these options ranger. If necessary you can call us with your credit card information. Read carefully. Electrical parts computers, modules, switches, and sensors do not carry any warranty sold as is. Expedited shipping is only available if ...(February 3rd, 2015)
• Transmission 00 99 10296 F150 04 02 01 03 Manual Ford (29.9% similar) No expedited shipping is available. Ford F150 manual transmission F150 manual transmission. If an item arrives damaged, please via message within 24 hours for instructions. N new part manufactured from scratch. This part comes with a parts only warranty. Seals and gaskets must be replaced. Warranty ...(August 9th, 2014)
• Taurus 103552 99 Automatic Transmission Ford (45.8% similar) No expedited shipping is available. 0,COL this part will fit these makes and model's with these options Taurus...(February 14th, 2015)
• Mustang Transmission 105613 Ford Automatic Sohc 4.0l 5 Speed 06 05 (40% similar) 0,AT this part will fit these makes and model's with these options mustang. Electrical parts computers, modules, switches, and sensors do not carry any warranty sold as is. Read carefully...(February 21st, 2015)