DACCO 79578BPDM Auto Trans Torque Converter

( Brand: Dacco ), ( Manufacturer Part Number: 79578BPDM ), ( Part Type: Torque Tran Converter ), ( Manufacturer Warranty: 12 Month Warranty ), ( Notes: Automatic Transmission Torque Converter Converter Codes ), ( Years: 2007 2003 2004 2005 2006 ), ( Application: Hummer H2 Auto Trans Torque Converter ), ( Product Name 2: Automatic Transmission Torque Converter ), ( Cs-sku: 400 )

Review DACCO Hummer Auto Trans Torque Converter fits H2 2003–2007

The **DACCO 79578BPDM Torque Converter** is a high-performance, direct-fit replacement designed specifically for the **2003-2007 Hummer H2 models equipped with an automatic transmission**, including the **2004, 2005, 2006, and 2007 variants**. Engineered to meet the demanding torque requirements of the H2 s powerful **6.0L Vortec V8 engine**, this torque converter delivers exceptional stalling speed, smooth engagement, and enhanced durability, ensuring optimal performance under heavy loads and aggressive driving conditions. Crafted from premium materials, including a **high-strength aluminum housing** and a **robust centrifugal clutch assembly**, the DACCO 79578BPDM is built to withstand the extreme forces generated by the H2 s robust powertrain while maintaining precise fluid dynamics for seamless shifting. Its **optimized stalling speed** carefully calibrated to complement the H2 s transmission system provides a responsive launch and effortless acceleration, whether navigating city streets or tackling rugged off-road terrain. The converter s **precision-machined components**, including a **durable stator and balanced impeller**, minimize wear and tear, extending the lifespan of both the converter and the transmission itself. Whether you re restoring a classic H2 or upgrading an existing vehicle for improved performance, the DACCO 79578BPDM offers a **direct bolt-on solution** that restores factory-like (or better) functionality without compromising on quality. Built to exacting standards and rigorously tested for compatibility, this torque converter is a trusted choice for enthusiasts and professionals alike, ensuring a **smooth, reliable, and high-performance driving experience** for your Hummer H2.

### **Pros and Cons of buying a DACCO 79578BPDM Torque Converter for 2003 2007 Hummer H2 (Auto Transmission, 2004 2006 Models)**

1. **Direct Fitment** The DACCO 79578BPDM is specifically designed for the 2003 2007 Hummer H2 with an automatic transmission, ensuring compatibility with the 2004, 2005, and 2006 model years (as well as some 2007 variants). This reduces the risk of installation issues compared to generic converters.

2. **Improved Performance** Many aftermarket torque converters are engineered to enhance shifting smoothness, reduce stall speed, and improve torque multiplication, which can lead to better acceleration and drivability, especially in heavy-duty applications like the H2.

3. **Durability** DACCO is a reputable brand known for manufacturing high-quality drivetrain components. Their torque converters are often built with robust materials, including stamped or machined housings and high-performance clutches, which can extend the life of the transmission.

4. **Compatibility with Upgrades** If you ve modified your H2 with a performance chip, larger turbo, or other power upgrades, a torque converter like this can help manage the increased power output better than the stock unit, reducing stress on the transmission.

5. **Easier Installation** Since it s a direct-fit part, installation is typically straightforward, especially if you have basic mechanical skills or access to a professional. The converter bolts onto the transmission housing without requiring major modifications.

6. **Cost-Effective Alternative** While not the cheapest option, it is often more affordable than a fully rebuilt transmission or a brand-new OEM converter. It provides a balance between performance and budget.

7. **Reduced Transmission Strain** A well-designed torque converter can reduce the workload on the transmission by improving fluid flow and clutch engagement, potentially extending the life of the transmission itself.

---

1. **Potential Stall Speed Issues** Some aftermarket torque converters, including certain DACCO models, may have a higher stall speed than the stock unit. While this can improve launch performance, it can also cause the engine to rev excessively during heavy loads (e.g., towing or aggressive driving), which may require adjustments to the transmission control module (TCM) or throttle response.

2. **Learning Curve for Installation** Even though it s a direct-fit part, removing the old converter and installing the new one requires draining transmission fluid, disconnecting the torque converter housing, and ensuring proper alignment. Mistakes here can lead to leaks or improper engagement.

3. **Limited Availability of OEM-Level Support** Unlike a fully rebuilt OEM converter, this is an aftermarket part. If issues arise (e.g., clutch failure, leaks), DACCO s customer support may not be as responsive as GM s official service, and warranty coverage could be more limited.

4. **Possible Transmission Fluid Requirements** Some high-performance torque converters benefit from specific transmission fluids (e.g., synthetic or high-zinc fluids). Using the wrong fluid can reduce performance or void warranties. Always check the manufacturer s recommendations.

5. **Not a Universal Fix for Transmission Problems** If your H2 s transmission is already failing (e.g., slipping, grinding, or fluid leaks), replacing just the torque converter won t solve underlying issues. A full transmission rebuild may still be necessary.

6. **Potential for Overkill** If your H2 isn t heavily modified or used for extreme towing, the performance gains from this converter may not be noticeable enough to justify the cost. The stock converter is already robust for daily driving.

7. **Resale Value Impact** Aftermarket parts can deter potential buyers who prefer OEM or fully rebuilt components. If you plan to sell the vehicle later, this modification might reduce its resale appeal unless disclosed transparently.

---

### **Conclusion**

The **DACCO 79578BPDM torque converter** is a solid choice for owners of the 2003 2007 Hummer H2 looking to enhance performance, reduce stall speed, or upgrade after engine or drivetrain modifications. Its direct fitment, durability, and potential for improved shifting make it a practical option for those who prioritize performance over strict OEM compatibility.

However, it s not a perfect solution. The higher stall speed and aftermarket nature mean it requires careful consideration of your driving habits, transmission health, and willingness to manage potential adjustments (e.g., TCM programming or fluid selection). If your primary goal is reliability and you haven t modified the vehicle, the stock converter may suffice, and a rebuilt OEM unit could be a safer long-term investment.

- You ve modified your H2 with a performance chip, turbo, or other power upgrades.

- You frequently tow heavy loads or need better launch performance.

- You re comfortable with minor transmission adjustments (e.g., stall speed tuning).

- You value aftermarket parts for their performance benefits over OEM components.

- Your transmission is already failing or showing signs of wear.

- You plan to keep the vehicle long-term without modifications and prefer OEM reliability.

- You re not willing to research transmission fluid requirements or potential TCM adjustments.

- You re on a tight budget and the stock converter meets your needs.

For the best results, pair this converter with a **full transmission service**, including fluid and filter replacement, and consider consulting a transmission specialist for installation and tuning. If you re unsure, a rebuilt OEM converter (e.g., from a reputable shop like **Transmission Specialists** or **Hummer Performance**) may offer a more conservative but reliable upgrade.

Details:

Parts Geek - For 2003 - 2007 Hummer H2 Auto Trans Torque Converter 79578BPDM 2004 2005 2006: Review Fitment Notes to Ensure Proper Fit condition: Remanufactured Brand: Dacco Notes: Automatic Transmission Codes:24206642, 24208325, 24210919, 24213393, 24227088, TMAX, TMBX, TWBX; Note:Low Stall 12 Month Warranty Vehicle: Engine: Transmission: H26.0L V84L65-E.

part #: 79578bpdm price

• $186.10

specifications torquconv:

• for makes: Hummer
• for years: 2003-2007
• brand: Dacco
• mpn: 79578bpdm
• part type: Torque Tran Converter
• manufacturer warranty: 12 Month Warranty
• notes: Automatic Transmission Torque Converter Converter Codes
• years: 2007 2003 2004 2005 2006
• application: Hummer H2 Auto Trans Torque Converter
• product name 2: Automatic Transmission Torque Converter
• cs-sku: 400

general torquconv:

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

seller torquconv:

• rating: 98.8%
• # reviews: 328519
• city: Pico Rivera, California

shipping torquconv:

• type: Fixed
• class: Standard
• carrier: FedEx
• service: FedEx Ground / FedEx Home Delivery
• cost: $0.00
• transit: 3-7 Days

payments torquconv:

• credit card: Mastercard
• other
• wallet: Paypal

returns torquconv:

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

offer torquconv:

• quantity: 1
• started: April 15, 2026
• availability: In Stock
• sold: 0
• options: Ship-to-home

Dacco 79578BPDM Is Similar To:

• 359 Dacco Remanufactured Auto Trans 847338020238 (35.4% similar) Vehicles sold outside of the USA may be different, even if they have same make and model name. Shipping labels may only be applied to a separate, outer box...(October 24th, 2017)
• 390 Dacco Automatic Transmission Torque 847338020481 (40.3% similar) Every converter goes through the following five-step process to ensure highest level of quality. 22LBS how does Dacco build a quality torque converter. Automatic transmission torque converter by Dacco. Final inspection functional testing for leaks, run out, end play and balance:custom built leak ...(December 30th, 2017)
• 400 Dacco Automatic Transmission Torque 847338020511 (40.3% similar) How does Dacco build a quality torque converter. Every converter goes through the following five-step process to ensure highest level of quality. Final inspection functional testing for leaks, run out, end play and balance:custom built leak check machines require human machine approval to pass with ...(December 30th, 2017)
• 514 Dacco Remanufactured Auto Trans 847338020542 (36.9% similar) Shipping labels may only be applied to a separate, outer box. Vehicles sold outside of the USA may be different, even if they have same make and model name...(October 21st, 2017)
• 520aa Dacco Transmission Parts Torque Converter (43.4% similar) Orders take hours processing time. Typically all parts have a 1 year manufacturer limited warranty...(May 22nd, 2018)
• 524 Dacco Remanufactured Auto Trans 847338020580 (36.9% similar) Vehicles sold outside of the USA may be different, even if they have same make and model name. Shipping labels may only be applied to a separate, outer box...(November 27th, 2017)
• 526 Dacco Remanufactured Auto Trans 847338020597 (35.4% similar) Shipping labels may only be applied to a separate, outer box. Vehicles sold outside of the USA may be different, even if they have same make and model name...(November 27th, 2017)
• 564 Dacco Remanufactured Auto Trans 847338020696 (35.4% similar) Vehicles sold outside of the USA may be different, even if they have same make and model name. Shipping labels may only be applied to a separate, outer box...(September 10th, 2017)
• 568 Dacco Remanufactured Auto Trans 847338020740 (36.9% similar) Vehicles sold outside of the USA may be different, even if they have same make and model name. Shipping labels may only be applied to a separate, outer box...(October 21st, 2017)
• 582y-90 Dacco Torque Converter Dodge Neon (39% similar) 60 bolt CIRCLE4 mounting pads 90 degrees, 10MM x Dacco 582Y-90 torque converter re-manufactured by DACCO10 DIAMETER8. 5MILLED flats on hub pilot 0LQUESTIONS. I can only help if the vehicle is original and not been modified...(September 2nd, 2018)
• 583ws Dacco Transmission Parts Torque (30.3% similar) Typically all parts have a 1 year manufacturer limited warranty. Orders take hours processing time...(September 16th, 2017)