DACCO 12387QKJW Auto Trans Torque Converter

( Brand: Dacco ), ( Manufacturer Part Number: 12387QKJW ), ( Part Type: Torque Tran Converter ), ( Manufacturer Warranty: 12 Month Warranty ), ( Notes: Automatic Transmission Torque Converter Converter Codes ), ( Years: 2015 2016 2017 2018 ), ( Application: Gmc Sierra 1500 Auto Trans Torque Converter ), ( Product Name 2: Automatic Transmission Torque Converter ), ( Cs-sku: 400 )

Review DACCO Gmc Auto Trans Torque Converter fits SIERRA 1500 2015–2018

The **DACCO 12387QKJW Torque Converter** is a high-performance, direct-fit replacement designed specifically for the **2015-2018 GMC Sierra 1500** with an **automatic transmission**, ensuring seamless integration and optimal performance for your vehicle. Engineered to meet or exceed OEM specifications, this torque converter is crafted from premium materials, including a robust **stamped steel housing** and a **high-quality aluminum impeller**, which work together to maximize torque transfer and enhance overall drivetrain efficiency. The **2016 and 2017 model-year variants** of this converter are particularly optimized for the **6L90 6-speed automatic transmission** found in these trucks, delivering smooth shifts, improved acceleration, and reduced transmission wear over time. Its **precision-balanced rotor assembly** minimizes vibration and noise, while the **optimized stator and turbine design** ensures efficient fluid circulation, which is critical for maintaining transmission health and longevity. Whether you're hauling heavy loads, towing trailers, or simply driving under demanding conditions, this torque converter provides the **torque multiplication and responsiveness** needed to keep your GMC Sierra 1500 performing at its best. Built to withstand the rigors of daily use, this aftermarket part is a **cost-effective alternative to OEM replacements**, offering the same level of reliability without the premium price tag. Installing the DACCO 12387QKJW is a straightforward process, thanks to its **direct bolt-on compatibility**, making it an ideal choice for both professional mechanics and DIY enthusiasts looking to restore or upgrade their transmission s performance. With its **durable construction, enhanced fluid dynamics, and seamless fit**, this torque converter is a standout solution for maintaining the power and durability of your GMC Sierra 1500 s automatic transmission system.

### **Pros and Cons of Buying a DACCO 12387QKJW Torque Converter for 2015 2018 GMC Sierra 1500 (Auto Transmission)**

1. **OEM-Quality Fitment** The DACCO torque converter is designed to match the specifications of the GM 6T70 transmission used in these Sierra models, ensuring proper engagement and performance.

2. **Improved Stalling and Stall Speed** This aftermarket torque converter is often tuned to provide better stall speed (typically around 2,000 2,500 RPM), which can improve towing and acceleration compared to the stock unit.

3. **Durability** DACCO converters are built with high-quality materials, including reinforced blades and a sturdy housing, which can extend the life of the transmission by reducing wear on the pump and turbine.

4. **Better Heat Dissipation** Some DACCO converters feature improved fluid flow, helping to reduce transmission overheating during heavy loads.

5. **Cost-Effective Upgrade** Compared to a full transmission rebuild or replacement, installing a new torque converter is a relatively inexpensive way to improve performance and reliability.

6. **Compatibility with Performance Mods** If you plan to add a performance chip, exhaust, or other drivetrain upgrades, a stiffer torque converter can help prevent transmission slippage.

7. **Warranty Coverage** DACCO offers warranties on their products, providing some peace of mind against premature failure.

1. **Potential Stall Speed Issues** While DACCO converters are generally well-tuned, some users report that the stall speed may still be slightly lower than higher-end aftermarket brands (e.g., Carter, TorqueMaster). This could affect towing or aggressive driving.

2. **Installation Complexity** Replacing a torque converter requires removing the transmission, which is a labor-intensive job best left to a professional. DIYers may struggle with alignment and sealing.

3. **Possible Transmission Clutch Wear** A stiffer torque converter can increase stress on the transmission s internal clutch packs, potentially leading to premature wear if the rest of the transmission is not in good condition.

4. **Limited Customization** Unlike some high-performance converters, the DACCO 12387QKJW is not highly adjustable, meaning you can t fine-tune stall speed or response beyond the factory settings.

5. **Quality Control Concerns** While DACCO is a reputable brand, there have been occasional reports of counterfeit or mismatched parts in the aftermarket. Always verify the product s authenticity before purchase.

6. **May Not Be Ideal for Heavy Towing** If you frequently tow large loads (e.g., 10,000 lbs), a more aggressive converter (e.g., Carter 6000 series) might be a better long-term solution.

7. **Potential for Reverse Gear Issues** Some users report that certain DACCO converters can cause reverse gear hesitation or slippage, though this is rare and often fixable with proper installation.

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The **DACCO 12387QKJW torque converter** is a solid, budget-friendly upgrade for the **2015 2018 GMC Sierra 1500 (6T70 transmission)**. It offers noticeable improvements in stall speed, durability, and overall transmission performance without the cost of a full rebuild. However, it is not a "high-performance" converter and may not suit extreme towing or aggressive driving without complementary transmission mods.

For most **daily drivers, light haulers, or occasional towers**, this converter provides a **good balance of cost, reliability, and performance**. If you plan to **tow heavily, modify the engine, or push the transmission hard**, consider a more aggressive converter (e.g., Carter 6000 series) or a full transmission upgrade.

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- You want a **cost-effective, OEM-quality upgrade** for better stall speed and transmission longevity.

- Your primary use is **light towing, hauling, or daily driving** without extreme loads.

- You re willing to **have a professional install it** to ensure proper alignment and sealing.

- You **frequently tow 8,000 lbs** or plan to add a performance engine.

- You want **higher stall speeds (3,000 RPM)** for aggressive driving.

- You ve experienced **transmission slippage or overheating** with the stock converter.

- Verify the **exact model year and transmission type** (6T70) to ensure compatibility.

- Check for **authentic DACCO parts** (avoid counterfeit sellers).

- Have the **transmission fluid changed** and the **transmission inspected** before installation to prevent future issues.

Overall, the DACCO converter is a **reliable choice for most Sierra owners**, but weigh your driving needs against the limitations before buying.

Details:

Parts Geek - For 2015 - 2018 GMC Sierra 1500 Auto Trans Torque Converter 12387QKJW 2016 2017: Review Fitment Notes to Ensure Proper Fit condition: Remanufactured Brand: Dacco Notes: Automatic Transmission Codes:Bottom: 2428 1894, 1895, 4689, 4690, 6736, 6975, 2429 7076; Note:Pilot length is 0.92 12 Month Warranty Vehicle: Engine: Transmission: 15005.3L V88L90.

specifications torquconv:

• for models: 1500, Sierra
• for makes: Gmc
• for years: 2015-2018
• brand: Dacco
• mpn: 12387qkjw
• part type: Torque Tran Converter
• manufacturer warranty: 12 Month Warranty
• notes: Automatic Transmission Torque Converter Converter Codes
• years: 2015 2016 2017 2018
• application: Gmc Sierra 1500 Auto Trans Torque Converter
• product name 2: Automatic Transmission Torque Converter
• cs-sku: 400

shipping torquconv:

• cost: $0.00
• class: Standard
• service: FedEx Ground / FedEx Home Delivery
• carrier: FedEx
• type: Fixed
• transit: 2-6 Days

offer torquconv:

• started: April 21, 2026
• availability: In Stock
• sold: 0
• quantity: 1
• options: Ship-to-home

returns torquconv:

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

seller torquconv:

• rating: 98.8%
• city: Fresno, California
• # reviews: 329483

general torquconv:

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

payments torquconv:

• other
• credit card: Mastercard
• wallet: Apple-pay

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