DACCO 59BNTTT99 Auto Trans Torque Converter Fleetwood

( Brand: Dacco ), ( Manufacturer Part Number: 59BNTTT99 ), ( Type: Auto Trans Torque Converter ), ( Fits 1: 1980 Cadillac Deville ), ( Fits 2: 1980-1981 Cadillac Eldorado ), ( Fits 3: 1980 Cadillac Fleetwood ), ( Fit Note: Automatic Transmission Torque Converter Fitment Note ), ( Manufacturer Warranty: 12 Month Warranty ), ( Attention: Please Read All Notes To Confirm Fitment ), ( Cs-sku: 400 )

Review DACCO Auto Trans Torque Converter Fleetwood fits DEVILLE ELDORADO SEVILLE

The **DACCO 59BNTTT99 Automatic Transmission Torque Converter** is a high-performance, direct-fit replacement designed specifically for Ford s legendary luxury vehicles, including the **1994 1995 Deville, Eldorado, Fleetwood, and Seville** models equipped with the **4R70W 4-speed automatic transmission**. Engineered to meet or exceed OEM specifications, this torque converter is crafted from premium materials to ensure durability, smooth operation, and optimal power transfer, making it an ideal upgrade for enthusiasts seeking enhanced acceleration, better shift quality, and improved overall drivetrain efficiency.

Built with a **stamped aluminum housing** and a **high-torque capacity**, this torque converter features a **sprag-type clutch** that delivers progressive engagement, reducing jerkiness during shifts and providing a more refined driving experience. The **optimized stator design** enhances fluid circulation, improving cooling efficiency and extending the life of the transmission fluid, while the **precision-machined pump housing** ensures consistent oil flow, reducing strain on the transmission components. Whether you're restoring a classic muscle car or maintaining a high-mileage luxury sedan, this torque converter is engineered to restore factory performance or even exceed it, thanks to its **stronger clutch springs** and **improved stall speed** ideal for towing, spirited driving, or simply restoring the original feel of your Ford s legendary V8.

The **DACCO 59BNTTT99** is a **drop-in replacement**, requiring no modifications to the transmission or engine bay, and is fully compatible with the **4R70W s torque converter housing**, ensuring a seamless installation. Its **robust construction** resists warping and wear, making it a reliable choice for both street and light-duty towing applications. Whether you're a mechanic looking for a premium aftermarket solution or a car owner seeking to restore factory performance, this torque converter delivers the **precision, strength, and smoothness** expected from DACCO s reputation for quality proving that even classic luxury vehicles can benefit from modern engineering without sacrificing authenticity.

### **Pros and Cons of buying a DACCO 59BNTTT99 Auto Transmission Torque Converter for Ford Deville, Eldorado, Fleetwood, and Seville (1984-1996)**

1. **Compatibility** This torque converter is specifically designed for Ford s 5.0L (302) and 4.6L (281) V8 engines in the Deville, Eldorado, Fleetwood, and Seville models from 1984 to 1996. It fits the **C4 automatic transmission** used in these vehicles, ensuring a proper match with the transmission s input shaft and pump housing.

2. **Performance Enhancement** The DACCO torque converter is built with high-quality materials, including a **stamped stator** and **heavy-duty clutch packs**, which can improve shift smoothness and reduce slippage compared to stock or aftermarket converters that may not be optimized for these applications.

3. **Durability** DACCO converters are known for their **robust construction**, which can withstand higher torque loads and prolonged use, especially if the vehicle is modified (e.g., forced induction, engine upgrades, or heavy towing).

4. **Easy Installation** Since it is a direct replacement for the stock torque converter, installation is straightforward for those with basic mechanical skills. It requires no major modifications to the transmission or engine bay.

5. **Warranty Support** DACCO offers warranties on their products, providing some assurance against manufacturing defects. This can be beneficial if the converter fails prematurely due to poor quality control.

6. **Cost-Effective Upgrade** Compared to full transmission rebuilds or replacements, upgrading to this torque converter is a relatively inexpensive way to improve drivability and prevent transmission damage from a slipping stock converter.

7. **Compatibility with Modifications** If you plan to add a **performance exhaust, cold air intake, or engine tuning**, this converter can help manage the increased power output better than a stock unit, reducing the risk of transmission failure.

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1. **Limited Availability of Parts** DACCO is not as widely recognized as some other transmission brands (e.g., Mopar, Ford, or Torque Converter Direct), which means finding replacement parts or additional support may be more difficult.

2. **Potential for Overkill** If your vehicle is not modified and runs stock power levels, the benefits of this torque converter may be minimal. A stock converter that is well-maintained (clean fluid, no leaks) may perform adequately without an upgrade.

3. **Installation Challenges for Beginners** While the installation is not extremely difficult, removing the old torque converter and sealing the new one properly requires careful attention to alignment and fluid leaks. Improper installation can lead to transmission damage.

4. **Cost Relative to Stock Replacement** If your stock torque converter is still functional but slipping, replacing it with a DACCO unit may not be cost-effective unless you are also addressing other transmission issues (e.g., worn bands, solenoids, or fluid).

5. **Mixed Reviews on Shift Quality** Some owners report that while the DACCO converter improves torque capacity, it can sometimes result in **harsher shifts** or a "stiffer" feel compared to a stock or aftermarket converter designed specifically for smoothness (e.g., a **Torque Converter Direct or Mopar converter**).

6. **Potential for Incompatibility with Heavy Modifications** If your vehicle has been heavily modified (e.g., turbocharged, supercharged, or with a large displacement engine), a DACCO converter may not be sufficient. In such cases, a **custom-built or high-performance converter** (e.g., from **Torque Converter Direct or TCI**) may be necessary.

7. **No Guarantee Against Transmission Issues** Even with a new torque converter, other transmission components (e.g., bands, clutches, solenoids) may still be worn out. If these are neglected, the converter upgrade alone will not fix transmission problems.

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The **DACCO 59BNTTT99 torque converter** is a **solid choice** for Ford Deville, Eldorado, Fleetwood, and Seville owners who want to **upgrade their transmission s torque capacity, improve shift quality, or prevent slippage** especially if the vehicle is modified or used for towing. It offers **better durability and performance** than a worn stock converter but may not be necessary for lightly used, stock-powered vehicles.

However, if your primary goal is **smooth shifts and reliability without overhauling the transmission**, you might consider alternatives like a **Torque Converter Direct or Mopar converter**, which are often preferred for their **polished shift characteristics**. Additionally, if your transmission has other issues (e.g., leaks, band wear), addressing those first would be more cost-effective than just replacing the torque converter.

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- Your vehicle has a **slipping stock torque converter** and you want a **direct replacement with improved torque handling**.

- You are **modifying your engine** (e.g., forced induction, engine swaps) and need a **higher-capacity converter**.

- You are **towing frequently** and want to reduce transmission stress.

- You are comfortable with **basic transmission work** and can ensure proper installation.

- Your vehicle runs **stock power levels** and the stock converter is still functional **replacing fluid and servicing the transmission** may be sufficient.

- You prioritize **smooth shifts over torque capacity** a **Torque Converter Direct or Mopar converter** may be a better fit.

- Your transmission has **other major issues** (e.g., leaking seals, worn bands) a **full rebuild or transmission overhaul** would be more beneficial.

- **Check for leaks** in the transmission before installing the new converter.

- **Use high-quality transmission fluid** (e.g., **Mercon V or Dexron III**) to ensure longevity.

- **Monitor shift quality** after installation if shifts remain harsh, further transmission adjustments may be needed.

- **Consider a transmission flush** before and after installation to remove old fluid and contaminants.

Ultimately, the DACCO converter is a **good mid-range option** for these Ford models, but its value depends on your specific needs and the condition of the rest of your transmission. If in doubt, consult a **transmission specialist** before purchasing.

Details:

1980 - 1981 Cadillac Seville 5.7L V8 THM325/M32. 1981 Cadillac Seville 4.1L V6 THM325/M32. 1980 Cadillac Eldorado 5.7L V8 THM325/M32. 1980 - 1981 Cadillac Eldorado 6.0L V8 THM325/M32.

part #: 59bnttt99 price

• $155.11

specifications torquconv:

• for models: Deville, Eldorado, Seville
• brand: Dacco
• mpn: 59bnttt99
• type: Auto Trans Torque Converter
• fits 1: 1980 Cadillac Deville
• fits 2: 1980-1981 Cadillac Eldorado
• fits 3: 1980 Cadillac Fleetwood
• fit note: Automatic Transmission Torque Converter Fitment Note
• manufacturer warranty: 12 Month Warranty
• attention: Please Read All Notes To Confirm Fitment
• cs-sku: 400

seller torquconv:

• # reviews: 57900
• rating: 97.2%
• city: Fresno, California

payments torquconv:

• credit card: Visa
• wallet: Google-pay
• other

returns torquconv:

• policy: Returns Accepted
• paid by: Seller
• time: 30 Days

offer torquconv:

• options: Ship-to-home
• sold: 0
• quantity: 1
• started: May 9, 2026
• availability: In Stock

general torquconv:

• Car Truck Parts Accessories > Transmission Drivetrain > Torque Converters
• condition: Remanufactured

shipping torquconv:

• service: Standard
• cost: $0.00
• type: Fixed
• class: Standard
• transit: 4-7 Days

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