DACCO 39JKDH42 Auto Trans Torque Converter

( Brand: Dacco ), ( Manufacturer Part Number: 39JKDH42 ), ( Type: Auto Trans Torque Converter ), ( Fits 1: 2002-2003 Bmw 745i ), ( 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 Bmw fits 745I 2002–2003

The **DACCO 39JKDH42 Auto Trans Torque Converter** is a high-performance, direct-fit replacement designed specifically for BMW s legendary **E38 745i models from 2002 and 2003**, which are equipped with the **M54B30 engine** and the **ZF 5HP19F automatic transmission**. Engineered to meet or exceed OEM specifications, this torque converter is crafted from premium materials to ensure durability, efficiency, and seamless integration with your vehicle s drivetrain. Built with a **stamped steel housing** and a **high-torque clutch assembly**, it delivers superior power transfer, reducing stall speed and improving acceleration while maintaining smooth shifting under varying load conditions. The **optimized stator and pump assembly** enhances fluid circulation, reducing heat buildup and extending the lifespan of your transmission fluid, while the **precision-balanced rotor** minimizes vibration and enhances overall drivability. Whether you re restoring a classic 745i to its original glory or upgrading for better performance, this torque converter is a reliable choice that restores factory-like performance without compromising on quality. Its **direct bolt-on compatibility** ensures an easy installation, making it an ideal solution for mechanics and DIY enthusiasts alike who demand precision and performance in their BMW modifications.

### **Pros and Cons of Buying a DACCO 39JKDH42 Auto Transmission Torque Converter for a 2002-2003 BMW 745i**

1. **Compatibility** The DACCO 39JKDH42 is specifically designed for the ZF 5HP19/5HP24 transmission found in the 2002-2003 BMW 745i, ensuring a proper fit and function without major modifications.

2. **Performance Upgrade** A high-quality torque converter can improve acceleration, especially when paired with a performance chip or upgraded transmission fluid. It may also reduce stall speed, allowing for quicker launches.

3. **Durability** DACCO is a reputable manufacturer known for producing reliable torque converters with strong clutch packs and stamped housings, which can withstand higher torque loads compared to OEM units.

4. **Ease of Installation** Since it is a direct replacement, installation is relatively straightforward for those with mechanical experience or when done by a professional transmission shop.

5. **Cost-Effective Alternative** Compared to a full transmission rebuild or replacement, upgrading just the torque converter is a budget-friendly way to improve drivability and longevity.

6. **Potential for Better Shift Quality** Some users report smoother shifts and reduced jerkiness, particularly if the original converter was worn or failing.

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

1. **Mixed User Experiences** While many users report positive results, others have experienced issues such as rough shifts, delayed engagement, or even failure if not installed correctly or paired with incompatible transmission fluid.

2. **Requires Proper Installation** A poorly installed torque converter (e.g., incorrect fluid level, misalignment, or improper torque specs) can lead to transmission damage or premature wear.

3. **Not a Guaranteed Fix for All Issues** If the transmission itself is failing (e.g., worn gears, solenoid problems, or fluid degradation), replacing just the torque converter may not resolve underlying problems.

4. **Potential for Overheating** A torque converter that is too aggressive (e.g., for a high-performance build) without corresponding transmission upgrades can cause overheating, especially in stop-and-go traffic.

5. **Limited Aftermarket Support** Unlike OEM parts, DACCO converters may not be as widely supported by BMW dealerships or specialized transmission shops, which could complicate warranty or repair issues.

6. **May Not Be Necessary for Mild Use** If the transmission is in good condition and the car is primarily used for light driving, upgrading the torque converter may not provide noticeable benefits.

7. **Risk of Voiding Warranty** If the vehicle is still under manufacturer warranty, installing an aftermarket torque converter could void coverage, especially if the failure is transmission-related.

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The **DACCO 39JKDH42 torque converter** is a viable option for BMW 745i owners looking to enhance acceleration, improve shift quality, or replace a worn-out OEM unit. It offers a balance of performance and reliability, particularly for those who drive aggressively or have modified their vehicles. However, it is not a universal fix its effectiveness depends on proper installation, compatible transmission fluid, and the overall health of the transmission system.

- **High-quality transmission fluid** (e.g., Motul Multi 77K or Liqui Moly Top Tec ATF).

- **A performance chip or ECU tune** to optimize torque converter engagement.

- **Regular transmission maintenance** (fluid changes, filter replacement).

- **Professional installation** to avoid common pitfalls.

If the transmission has **major internal wear** (e.g., slipping gears, grinding noises, or fluid contamination), replacing just the torque converter may not be sufficient, and a full rebuild or transmission upgrade may be necessary.

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- **If your transmission is in good condition and you want a performance boost**, the DACCO 39JKDH42 is a solid choice, especially for those who enjoy spirited driving.

- **If you notice rough shifts, delayed engagement, or overheating**, consider diagnosing the transmission further before upgrading just the torque converter.

- **For a more comprehensive upgrade**, pair this converter with a **performance transmission fluid, a tune, and possibly a torque converter clutch kit** for even better results.

- **Avoid cheap or unknown brands** stick with reputable manufacturers like DACCO, Carter, or Torque Converter Specialties to ensure quality and longevity.

Ultimately, weigh the **pros and cons against your driving habits and budget**. If installed and maintained correctly, this converter can be a worthwhile investment for improving your 745i s performance.

Details:

12 Month Warranty. Auto Trans Torque Converter 39JKDH42 for BMW 745I 2002 2003: Brand: Dacco condition: Remanufactured, Notes Automatic Transmission Codes:206-507, L62, L65, V73, Z74, Detailed Applications , 2002 - 2003 745I4.4L V86HP26.

part #: 39jkdh42 price

• $240.12

specifications torquconv:

• for makes: Bmw
• for years: 2002-2003
• brand: Dacco
• mpn: 39jkdh42
• type: Auto Trans Torque Converter
• fits 1: 2002-2003 Bmw 745i
• fit note: Automatic Transmission Torque Converter Converter Codes
• manufacturer warranty: 12 Month Warranty
• attention: Please Read All Notes To Confirm Fitment
• cs-sku: 400

offer torquconv:

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

payments torquconv:

• other
• wallet: Paypal
• credit card: Mastercard

returns torquconv:

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

general torquconv:

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

seller torquconv:

• # reviews: 57669
• rating: 97.0%
• city: San Bernardino, California

shipping torquconv:

• class: Standard
• service: Standard
• cost: $0.00
• transit: 3-6 Days
• type: Fixed

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