DACCO 31TSNVB38 Auto Trans Torque Converter

( Brand: Dacco ), ( Manufacturer Part Number: 31TSNVB38 ), ( Type: Auto Trans Torque Converter ), ( Fits 1: 1998-2005 Buick Lesabre ), ( Fits 2: 2004-2007 Buick Rendezvous ), ( Fits 3: 1997-2003 Buick Regal ), ( Fit Note: Automatic Transmission Torque Converter Converter Codes ), ( Manufacturer Warranty: 12 Month Warranty ), ( Attention: Please Read All Notes To Confirm Fitment ), ( Cs-sku: 400 )

Review DACCO Auto Trans Torque Converter Avenue fits LESABRE PARK RENDEZVOUS REGAL

The **DACCO 31TSNVB38 Auto Transmission Torque Converter** is a high-performance, direct-fit replacement designed specifically for Ford s 4R75E and 4R70W automatic transmissions found in select models of the **Ford Taurus, Mercury Sable, Lincoln LS, and the Mercury Grand Marquis**, as well as certain **Lincoln Town Car** and **Ford Crown Victoria** variants. Engineered to meet or exceed OEM specifications, this torque converter is crafted from premium materials, including a robust aluminum housing and a high-quality turbine assembly, ensuring durability and optimal performance under demanding driving conditions. The **31TSNVB38** features a **stator with a one-way clutch** that enhances fluid circulation, improving torque multiplication and overall transmission efficiency, particularly during acceleration and load-bearing scenarios. Its **sprag-type clutch** design minimizes slippage, reducing heat buildup and extending the lifespan of both the converter and the transmission itself. This torque converter is particularly well-suited for vehicles like the **Ford Lesabre, Mercury Park Avenue, and the Mercury Rendezvous**, as well as the **Ford Regal (export models)**, where a reliable and responsive torque converter is essential for smooth shifting and power delivery. Whether used in daily driving, towing applications, or performance-oriented setups, the DACCO 31TSNVB38 delivers consistent torque response, reduced transmission wear, and a noticeable improvement in overall drivability. Built to withstand the rigors of modern driving, this converter is a cost-effective upgrade that restores factory-like performance while offering enhanced longevity compared to generic aftermarket alternatives.

### **Pros and Cons of Buying a DACCO 31TSNVB38 Auto Transmission Torque Converter for a 1996 2004 Oldsmobile Aurora, Pontiac Grand Prix, or Buick Regal (with Park/Rendezvous/Lesabre variants)**

1. **Compatibility** The DACCO 31TSNVB38 is specifically designed for GM 31-spline automatic transmissions (common in 1996 2004 models like the Aurora, Grand Prix, and Regal). This reduces the risk of fitment issues compared to generic converters.

2. **Improved Performance** A high-quality aftermarket torque converter can enhance acceleration, especially in vehicles with stock or worn-out converters. The DACCO unit is engineered for better stall speed and fluid flow, which may improve towing capacity and overall drivability.

3. **Durability** DACCO is a reputable brand known for manufacturing reliable transmission components. The 31TSNVB38 is built with sturdy materials and precision machining, which can extend the life of your transmission if installed correctly.

4. **Cost-Effective Alternative** Replacing a worn-out stock torque converter with a new DACCO unit is often cheaper than a full transmission rebuild or replacement. It can be a practical solution for restoring performance without a major overhaul.

5. **Easier Installation** Since it s a direct replacement part, installation is straightforward for those with basic mechanical skills or when done by a professional. No major transmission modifications are typically required.

6. **Better Fluid Circulation** A well-designed torque converter improves oil flow, reducing heat buildup and wear on internal transmission components.

7. **Potential for Improved Fuel Efficiency** In some cases, a properly functioning torque converter can optimize transmission shifting, leading to slightly better fuel economy compared to a failing stock unit.

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1. **Installation Complexity** While the converter itself is a direct replacement, removing the old unit may require draining transmission fluid, removing the transmission pan, and potentially addressing minor leaks or gasket issues. This can be time-consuming for inexperienced DIYers.

2. **Potential for Overkill** If your transmission is already failing due to other issues (e.g., worn clutches, leaks, or internal damage), replacing just the torque converter may not fully resolve performance problems. A full transmission service or rebuild might still be needed.

3. **Cost vs. Benefit** The price of a DACCO converter (typically $150 $300) may not justify the purchase if the transmission is severely degraded. In such cases, a rebuild or replacement could be more cost-effective long-term.

4. **Learning Curve for DIY Installation** If you re not familiar with automatic transmission work, mistakes during installation (e.g., improper torque specs, fluid contamination, or misalignment) could lead to further damage or premature failure.

5. **Limited Warranty** While DACCO offers warranties (usually 1 2 years), they may not cover installation errors or damage caused by improper use (e.g., aggressive driving with a new converter that hasn t fully broken in).

6. **Break-In Period Required** A new torque converter needs time to bed in, during which it may not perform at peak efficiency. Rushing the break-in process (e.g., aggressive driving) can reduce its lifespan.

7. **Compatibility with Modifications** If your vehicle has been modified (e.g., performance chips, larger engines, or heavy-duty drivetrains), the stock converter may not be sufficient. In such cases, a heavier-duty converter (e.g., a 32-spline or performance unit) might be necessary, which could void the DACCO s fitment guarantees.

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### **Conclusion**

The DACCO 31TSNVB38 torque converter is a solid choice for restoring performance in a 1996 2004 Oldsmobile Aurora, Pontiac Grand Prix, or Buick Regal with a 31-spline automatic transmission. It offers improved acceleration, durability, and fluid circulation at a reasonable cost, making it a practical upgrade for vehicles where the stock converter is worn or failing. However, it s not a universal fix if the transmission has deeper issues, a converter replacement alone may not be enough.

For most drivers looking to revive a sluggish automatic transmission without a full rebuild, this part is a worthwhile investment. Those with mechanical experience can install it themselves, while others should consult a professional to ensure proper installation and fluid changes.

- Your transmission is otherwise healthy (no leaks, clutch wear, or internal damage).

- You notice sluggish acceleration, poor stall speed, or overheating due to a failing converter.

- You re comfortable with basic transmission work or have a trusted mechanic to handle installation.

- You plan to pair it with a transmission fluid flush and filter replacement for optimal performance.

- Your transmission has visible leaks, strange noises, or shifting issues unrelated to the converter.

- You re unsure about DIY installation and don t have access to a reliable mechanic.

- The cost doesn t align with the expected benefit (e.g., the transmission is beyond repair).

For best results, always follow the break-in procedure (avoid aggressive driving for the first 100 200 miles) and monitor transmission performance post-installation. If symptoms persist, further diagnostics may be necessary.

Details:

1998 2003 Buick Regal 3.8L V6 4T65-E. 2007 Buick Rendezvous 3.5L V6 4T65-E. 1997 2003 Buick Regal 3.8L V6 4T65-E-HD/MN7. 1998 2005 Buick LeSabre 3.8L V6 4T65-E.

specifications torquconv:

• for models: Lesabre, Park, Rendezvous, Regal
• brand: Dacco
• mpn: 31tsnvb38
• type: Auto Trans Torque Converter
• fits 1: 1998-2005 Buick Lesabre
• fits 2: 2004-2007 Buick Rendezvous
• fits 3: 1997-2003 Buick Regal
• fit note: Automatic Transmission Torque Converter Converter Codes
• manufacturer warranty: 12 Month Warranty
• attention: Please Read All Notes To Confirm Fitment
• cs-sku: 400

returns torquconv:

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

shipping torquconv:

• transit: 2-6 Days
• service: Standard
• class: Standard
• type: Fixed
• cost: $0.00

general torquconv:

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

seller torquconv:

• rating: 97.1%
• # reviews: 57801
• city: Cleveland, Ohio

offer torquconv:

• availability: In Stock
• sold: 0
• options: Ship-to-home
• started: May 6, 2026
• quantity: 1

payments torquconv:

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

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