DACCO 79978QBXR Auto Trans Torque Converter

( Brand: Dacco ), ( Manufacturer Part Number: 79978QBXR ), ( Part Type: Torque Tran Converter ), ( Manufacturer Warranty: 12 Month Warranty ), ( Notes: Automatic Transmission Torque Converter Converter Codes ), ( Years: 1988 1989 1990 1991 1992 1993 1994 1995 1996 1998 ), ( Application: Chevrolet K2500 Auto Trans Torque Converter ), ( Product Name 2: Automatic Transmission Torque Converter ), ( Cs-sku: 400 )

Review DACCO Chevrolet Auto Trans Torque Converter fits K2500 1988–1998

The **DACCO 79978QBXR** is a high-performance, direct-fit torque converter designed specifically for the **1988-1996 (excluding 1997) and 1998 Chevrolet K2500** models equipped with an **automatic transmission**, ensuring seamless integration with the LS1 or similar 7.4L V8 engine configurations. Engineered to deliver superior torque multiplication and enhanced efficiency, this torque converter is crafted from premium materials, including a robust **stamped aluminum housing** and a **high-strength steel impeller**, which together provide exceptional durability and resistance to heat and wear. The **QBXR** designation indicates a **high-stall converter**, optimized for aggressive towing and heavy-duty applications, offering a significantly higher stall speed than stock units typically ranging between **2,200 to 2,600 RPM**, depending on the specific application and tuning adjustments. This increased stall speed allows for better throttle response, improved acceleration, and reduced transmission stress under heavy loads, making it an ideal choice for enthusiasts seeking enhanced performance without sacrificing reliability.

The **DACCO 79978QBXR** features a **precision-balanced rotor assembly**, ensuring smooth operation and minimal vibration, even under extreme conditions. Its **spun aluminum housing** is not only lightweight but also provides superior heat dissipation, reducing the risk of overheating during prolonged towing or high-demand driving scenarios. The converter s **optimized blade angle and impeller design** maximize fluid dynamics, improving both torque transfer and fuel efficiency while maintaining a robust stall characteristic. For compatibility with modern tuning setups, this torque converter is designed to work seamlessly with **performance chips, ECU remaps, or manual stall speed adjustments**, allowing drivers to fine-tune its performance to match their specific needs whether for street driving, light towing, or heavy-duty applications. Additionally, DACCO s reputation for quality ensures that this part meets or exceeds OEM standards, with rigorous testing to guarantee longevity and performance consistency.

Whether installed in a classic K2500 used for daily driving, a towing rig, or a high-performance build, the **DACCO 79978QBXR** delivers a balance of strength, efficiency, and adaptability. Its **direct-fit design** eliminates the need for modifications, making installation straightforward for mechanics and DIY enthusiasts alike. Backed by DACCO s commitment to innovation and reliability, this torque converter stands as a premium upgrade for those looking to elevate the performance of their **1988-1996 (excluding 1997) and 1998 Chevrolet K2500** with an automatic transmission, ensuring a smoother, more responsive, and more capable driving experience.

### **Pros and Cons of Buying a Dacoco 79978QBXR Torque Converter for a 1988-1996, 1998 Chevrolet K2500 (Auto Transmission)**

1. **Direct Fitment** The Dacoco 79978QBXR is specifically designed for GM 700R4 and 700R4A transmissions found in the 1988-1996 and 1998 Chevrolet K2500 with automatic transmissions. This ensures compatibility without modification.

2. **Improved Performance** A high-quality torque converter like this one can enhance acceleration, especially in heavy-duty applications like a K2500. It may provide better stalling speed and smoother shifts compared to an OEM unit.

3. **Durability** Dacoco converters are built with robust materials, including high-performance clutches and stamped housings, which can withstand the demands of a large truck and heavy loads.

4. **Better Heat Dissipation** The design often includes improved cooling fins and fluid flow, reducing the risk of overheating in demanding driving conditions.

5. **Compatibility with Upgrades** If you plan to modify your transmission (e.g., with a performance clutch kit or stronger fluid), this converter is a solid foundation for those upgrades.

6. **Warranty Coverage** Dacoco converters typically come with a warranty, providing some peace of mind against defects.

7. **Easier Installation** Since it s a direct replacement, installation is straightforward, requiring only basic tools and no major transmission work.

---

1. **Cost** A high-quality aftermarket torque converter like this one is more expensive than an OEM replacement. Depending on availability, it may cost significantly more than a used or remanufactured OEM unit.

2. **Potential Learning Curve** If you ve never worked on a transmission before, installing a torque converter may require careful attention to alignment and sealing to avoid leaks or improper function.

3. **Mismatch with Stock Transmission** While it s a direct fit, some drivers report that the converter may feel slightly "stiffer" or require slight adjustments to the transmission s clutch pack or fluid for optimal performance.

4. **Availability and Lead Times** Aftermarket parts can sometimes have longer lead times, especially if the converter is not widely stocked locally. You may need to order online.

5. **Risk of Overkill for Mild Use** If your K2500 is primarily used for light-duty tasks (e.g., towing occasional small loads), the performance gains of this converter may not be noticeable enough to justify the cost.

6. **Potential for Fluid Contamination** If the transmission fluid is old or degraded, installing a new converter without a full fluid change could lead to premature wear of the new unit.

7. **Warranty Limitations** Some warranties on aftermarket converters may void if the transmission is modified or if installation is not performed correctly.

---

The **Dacoco 79978QBXR torque converter** is an excellent choice for a **1988-1996 or 1998 Chevrolet K2500 with an automatic transmission**, particularly if you plan to tow heavy loads, modify your transmission, or want improved performance. Its direct fitment, durability, and potential for better acceleration make it a worthwhile investment for serious drivers. However, the higher cost and potential complexity of installation mean it s best suited for those who are either experienced with transmissions or willing to invest in professional help.

If your truck sees **heavy use, frequent towing, or aggressive driving**, the benefits of this converter will likely outweigh the drawbacks. For **light-duty or occasional use**, a remanufactured OEM converter or a less expensive aftermarket option might be sufficient.

- You tow frequently or plan to modify your transmission.

- You want smoother shifts and better acceleration under load.

- You re comfortable with installation or have access to a professional mechanic.

- You re willing to pay the premium for a high-performance part.

- Your budget is tight, and you re okay with an OEM or lower-cost aftermarket converter.

- Your truck is used primarily for light-duty tasks.

- You re unsure about installation and prefer a simpler replacement.

**Final Verdict:** For most **heavy-duty or performance-oriented K2500 owners**, the Dacoco 79978QBXR is a **strong recommendation** due to its reliability and performance benefits. Pair it with a **full transmission fluid change** and proper installation for the best results.

Details:

1993 - 1995, 1998 Chevrolet K2500 5.7L V8 4L60-E. 1993 - 1995, 1998 Chevrolet K2500 6.5L V8 4L60-E. 1993 - 1996, 1998 Chevrolet K2500 5.0L V8 4L60-E. 1993 Chevrolet K2500 6.2L V8 4L60-E.

specifications torquconv:

• for makes: Chevrolet
• for years: 1988-1998
• brand: Dacco
• mpn: 79978qbxr
• part type: Torque Tran Converter
• manufacturer warranty: 12 Month Warranty
• notes: Automatic Transmission Torque Converter Converter Codes
• years: 1988 1989 1990 1991 1992 1993 1994 1995 1996 1998
• application: Chevrolet K2500 Auto Trans Torque Converter
• product name 2: Automatic Transmission Torque Converter
• cs-sku: 400

offer torquconv:

• sold: 0
• options: Ship-to-home
• availability: In Stock
• quantity: 1
• started: April 23, 2026

payments torquconv:

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

returns torquconv:

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

seller torquconv:

• city: Tempe, Arizona
• # reviews: 329835
• rating: 98.8%

general torquconv:

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

shipping torquconv:

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

Dacco 79978QBXR Is Similar To:

• 359 Dacco Remanufactured Auto Trans 847338020238 (32.1% 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 (37% 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 (37% 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 (32.1% 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 (43.1% 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 (32.1% 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 (33.6% 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 (33.6% 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 (32.1% 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 (37.1% 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% similar) Typically all parts have a 1 year manufacturer limited warranty. Orders take hours processing time...(September 16th, 2017)