DETROIT 400.FLHC16 Auto Transmission Hfre DT12-OA 12733057

( Brand: Detroit ), ( Model: HFRE-CONV ), ( Conditions Options: E-spd, 10c, T-o ), ( Genuine Oem: Yes ), ( Vintage Part: No ), ( Type: Automatic Transmission ), ( Ipn: 400.flhc16 )

Review DETROIT Auto Transmission Freightliner Good Used fits 400 2016

The **Detroit 400.FLH.C16 DT12-OA Automatic Transmission** is a high-performance, heavy-duty transmission engineered specifically for Freightliner s **Cascadia, Century Class, and other high-roof models**, including the **FL7000 series**, ensuring seamless power delivery and exceptional durability in demanding commercial applications. Built upon Detroit s legendary **400 series** architecture, this transmission is designed to handle the rigorous demands of long-haul freight, regional hauling, and heavy-duty stop-and-go operations with precision and reliability. The **C16 variant** incorporates a **6-speed automatic transmission** with a **torque converter clutch (TCC)** for optimized fuel efficiency and reduced wear, making it an ideal choice for fleets prioritizing both performance and cost-effectiveness.

The **DT12-OA** designation signifies a **dual-turbine, 12-speed gearing system** that enhances torque multiplication and smooth shifting, particularly beneficial for pulling heavy loads or navigating steep grades. This transmission features **advanced hydraulic and electronic controls**, including **shift-by-wire technology**, which allows for precise, driver-adjustable shift points to optimize fuel economy, acceleration, and payload capacity. The robust **planetary gearset** and **multi-disc clutch packs** ensure long-lasting durability, even under extreme operating conditions, while the **integrated torque converter** with **multi-stage torque converter clutch** minimizes slippage and improves overall efficiency.

For Freightliner s **12733057** and compatible models, this transmission is engineered to integrate seamlessly with **Detroit Series 60, DD15, or DD13 engines**, delivering a harmonized power train that maximizes torque transfer while maintaining low maintenance requirements. The **FLH.C16** variant includes **enhanced cooling systems**, including a **dedicated transmission cooler** and **extended-duration fluid**, to prevent overheating in high-stress applications. Additionally, its **compact yet robust design** allows for easy installation in Freightliner s high-roof chassis, ensuring minimal space constraints while maintaining structural integrity.

Built to meet **EPA 2010 and later emissions standards**, this transmission is also equipped with **advanced diagnostics and telematics compatibility**, enabling fleet managers to monitor performance, predict maintenance needs, and extend component lifespan through real-time data analytics. Whether deployed in **long-haul freight, regional delivery, or construction applications**, the **Detroit 400.FLH.C16 DT12-OA** delivers a perfect balance of power, efficiency, and longevity, making it a premium choice for fleets demanding reliability without compromise.

### **Pros and Cons of Buying a Detroit 400 FLHC16 DT12-OA Auto Transmission for a Freightliner (Part Number: 12733057)**

#### **Pros**

1. **Compatibility with Freightliner Models** The Detroit 400 FLHC16 is specifically designed for Freightliner trucks, including the older models that require the DT12-OA transmission. This ensures proper fitment and functionality without major modifications.

2. **Reliability in Heavy-Duty Applications** The Detroit 400 is a well-established transmission in the heavy-duty market, known for its durability in long-haul and freight applications. It has a strong reputation for handling high torque loads, which is essential for long-distance freight hauling.

3. **Automatic Transmission Convenience** The DT12-OA automatic transmission eliminates the need for manual shifting, reducing driver fatigue over long routes. This is particularly beneficial for over-the-road (OTR) freight operations where drivers spend extended hours behind the wheel.

4. **Proven Performance in Older Freightliner Trucks** Many Freightliner models from the late 1990s to early 2000s (such as the FL4500, FL5000, or FL7000 series) were originally equipped with Detroit 400 transmissions. A used or remanufactured unit can be a cost-effective replacement for failing stock transmissions.

5. **Remanufactured Options Available** If purchasing used, you can find remanufactured Detroit 400 transmissions that have been rebuilt to factory specifications. This can extend the lifespan of the transmission while reducing costs compared to a new unit.

6. **Widely Available Parts and Service Support** Due to its popularity, the Detroit 400 has a broad network of service centers, dealers, and aftermarket parts suppliers. This makes maintenance, repairs, and upgrades more accessible.

7. **Better Fuel Efficiency Than Older Manuals** Compared to older manual transmissions, the automatic DT12-OA can improve fuel efficiency by optimizing gear shifts for better engine performance, reducing wear on the drivetrain.

8. **Lower Operating Costs Over Time** While the upfront cost may be higher than a used manual transmission, the reduced driver fatigue and improved fuel economy can lead to long-term savings in labor and fuel expenses.

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#### **Cons**

1. **Higher Initial Cost** Compared to used manual transmissions or cheaper aftermarket alternatives, a Detroit 400 FLHC16 (especially a remanufactured or new unit) can be expensive. The part number **12733057** may refer to a specific model or variant, which could further increase the price.

2. **Potential for Hidden Issues in Used Units** If purchasing a used transmission, there is a risk of undiagnosed internal wear, fluid leaks, or improper maintenance history. Always verify the service records and inspect for signs of damage before buying.

3. **Compatibility with Modern Emissions Standards** Some newer Freightliner models may require updated transmission control modules (TCMs) or software to comply with modern emissions regulations. A DT12-OA may need retrofitting or reprogramming to work seamlessly with newer engines.

4. **Limited Availability of New Units** Detroit Diesel has largely phased out production of the 400 series in favor of newer transmissions (e.g., the DD13 or DD15). Finding a new or OEM-certified used unit may be difficult, increasing reliance on remanufactured parts.

5. **Maintenance Requirements** Automatic transmissions like the DT12-OA require regular fluid changes and inspections to prevent premature failure. Neglecting maintenance can lead to costly repairs, such as torque converter or clutch issues.

6. **Potential for Incompatibility with Modern Diagnostics** Some newer Freightliner trucks use advanced diagnostic systems that may not fully support older transmission models. This could limit troubleshooting capabilities or require additional software updates.

7. **Weight and Space Considerations** Automatic transmissions are generally heavier than manual ones, which may affect the truck s overall weight distribution and fuel efficiency slightly. This is less of an issue in heavy-duty applications but worth noting for payload calculations.

8. **Depreciation Risk** If the truck is older and the transmission is not a critical upgrade, the value of the truck may not increase significantly with this replacement. The cost may not be fully recouped if the vehicle is sold later.

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### **Conclusion**

The **Detroit 400 FLHC16 DT12-OA automatic transmission (part #12733057)** is a solid choice for Freightliner trucks, particularly older models that originally came with this transmission. It offers reliability, convenience, and improved performance for long-haul freight operations. However, the higher cost, potential for hidden issues in used units, and compatibility concerns with newer vehicles must be carefully considered.

If you are restoring an older Freightliner truck or replacing a failing transmission in a model that requires this specific unit, the benefits outweigh the drawbacks. For newer or more modern trucks, evaluating whether a newer transmission (e.g., DD13-based) would be more cost-effective in the long run is advisable.

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### **Recommendation**

- **If your Freightliner is an older model (pre-2000s) and the DT12-OA is the correct fit**, purchasing a **remanufactured Detroit 400 transmission** (preferably from a reputable dealer with a warranty) is the best option. Ensure the unit has been fully serviced and tested before installation.

- **If your truck is newer or you plan to keep it long-term**, consider whether upgrading to a more modern transmission (e.g., a DD13-based automatic) would provide better reliability and compatibility with current diagnostics.

- **Always inspect the transmission thoroughly** (or have a mechanic do so) before purchasing a used unit. Check for leaks, proper fluid condition, and signs of internal wear.

- **Budget for maintenance** automatic transmissions require regular fluid changes and inspections to avoid costly failures.

- **Verify compatibility** with your truck s engine and drivetrain setup to ensure seamless integration.

For most cases where the DT12-OA is the correct transmission for the application, it remains a **strong, dependable choice** especially if you prioritize reliability and ease of operation over the latest technology.

Details:

Computer still looks good you don't have to use it though. In good shape, the fire didn damage essential parts; rubber and plastics are not even burnt.

part #: hfre prices

• $470.00-$3100.68

specifications autotransmissionsgo:

• for makes: Freightliner
• for years: 2016
• brand: Detroit
• model: Hfre-conv
• conditions options: E-spd, 10c, T-o
• genuine oem: Yes
• vintage part: No
• type: Automatic Transmission
• ipn: 400.flhc16

shipping autotransmissionsgo:

• class: Standard
• carrier: FedEx
• transit: 5-12 Days
• cost: $135.43
• service: FedEx Ground / FedEx Home Delivery
• type: Calculated

seller autotransmissionsgo:

• # reviews: 242
• city: East Hartford, Connecticut
• rating: 100.0%

offer autotransmissionsgo:

• options: Ship-to-home
• started: April 4, 2026
• quantity: 1
• sold: 0
• availability: In Stock
• best offers: True

payments autotransmissionsgo:

• other
• credit card: Diners-club
• wallet: Apple-pay

general autotransmissionsgo:

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

returns autotransmissionsgo:

• policy: No Returns

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