1. Torque Converters For Sale
  2. sku: 7282456719258793
  3. AC DELCO 25619FQTB

AC DELCO 25619FQTB Auto Trans Torque Converter

fits make: Chevrolet. year: 1988–1991.

25619fqtb Ac Delco For 1988-1991 Chevrolet K2500 Auto Trans Torque Converter

( Brand: Ac Delco ), ( Manufacturer Part Number: 25619FQTB ), ( Part Type: Torque Tran Converter ), ( Manufacturer Warranty: 12 Month Warranty ), ( Notes: Automatic Transmission Torque Converter Remanufactured ), ( Years: 1988 1989 1990 1991 ), ( Application: Chevrolet K2500 Auto Trans Torque Converter ), ( Product Name 2: Automatic Transmission Torque Converter ), ( Cs-sku: 400 )

Review AC DELCO Chevrolet Auto Trans Torque Converter fits K2500 1988–1991

The **AC Delco 25619FQTB** is a high-performance, direct-fit torque converter designed specifically for the **1988 1991 Chevrolet K2500** equipped with an automatic transmission, particularly those paired with the **5.7L (350 cubic inch) V8 engine** and its corresponding **THM725C or THM725C1 transmission**. Engineered to meet the demanding requirements of heavy-duty applications, this torque converter delivers superior torque multiplication and fluid flow efficiency, ensuring optimal power transfer and smooth shifting under heavy loads. Crafted from durable materials, including a robust **stamped steel housing** and precision-machined components, the 25619FQTB is built to withstand the rigors of towing, hauling, and high-performance driving while maintaining reliability over extended use. Its **one-way clutch assembly** allows for efficient stall speed control, reducing transmission wear and improving fuel economy when idling, while the **optimized stator design** enhances fluid circulation, reducing heat buildup and prolonging transmission life. Whether used in a classic muscle truck, a workhorse towing vehicle, or a modified performance rig, this torque converter provides the necessary torque multiplication often in the range of **1.8:1 to 2.2:1** to maximize engine power delivery without sacrificing responsiveness. Backed by **AC Delco s reputation for quality and compatibility**, this part is a direct replacement for the factory unit, ensuring a perfect fit and seamless integration with the transmission s internal components. For drivers seeking improved towing capacity, better throttle response, or a more engaging driving experience, the **25619FQTB** is an excellent upgrade choice that combines durability, performance, and ease of installation.

### **Pros and Cons of buying a AC Delco 25619FQTB Torque Converter for a 1988-1991 Chevrolet K2500 (Automatic Transmission)**

#### **Pros:**

1. **OEM Compatibility** The AC Delco 25619FQTB is an original equipment (OEM) part designed specifically for the 1988-1991 Chevrolet K2500 with an automatic transmission. This ensures a perfect fit and proper function without the need for modifications.

2. **Reliability** AC Delco is a trusted brand under General Motors, known for producing high-quality transmission components. The torque converter is built to handle the torque demands of the LS1/L78 V8 engine in the K2500, reducing the risk of premature failure.

3. **Performance Match** The torque converter is engineered to work efficiently with the **THM700R4** transmission, which was standard in these trucks. It provides adequate stalling speed and stall torque for towing and hauling, making it suitable for moderate duty applications.

4. **Ease of Installation** Since it is an OEM replacement, the torque converter can be installed without requiring special tools or modifications. The mounting points and fluid passages align correctly with the transmission.

5. **Warranty Coverage** AC Delco parts often come with manufacturer warranties (typically 1-2 years), providing some protection against defects in materials or workmanship.

6. **Cost-Effective Alternative to Remanufactured Units** While remanufactured torque converters can be cheaper, an OEM unit like this eliminates concerns about unknown service history or potential wear issues.

---

#### **Cons:**

1. **Higher Upfront Cost** Compared to aftermarket or remanufactured torque converters, the AC Delco unit is more expensive. Prices typically range between **$200 $400**, depending on availability and retailer markup.

2. **Limited Availability** Since this is an older model part, it may not be as widely stocked as newer components. Purchasing may require ordering from specialty auto parts suppliers or online marketplaces, which could delay installation.

3. **Potential for Counterfeit Parts** Due to its age, there is a risk of encountering counterfeit or low-quality AC Delco parts, especially when buying from third-party sellers. Always verify the part s authenticity through the seller s reputation or return policy.

4. **No Performance Upgrades** Unlike aftermarket torque converters designed for high-performance applications, this OEM unit does not offer improved stall torque or better heat dissipation. If you plan to tow heavily or modify the engine, a performance torque converter may be more suitable.

5. **Transmission Fluid Compatibility** While the torque converter is designed for use with **Dexron III** or **Mercon** transmission fluid, mixing fluids or using the wrong type can reduce its lifespan. Proper fluid changes are essential for longevity.

6. **No Built-In Cooling Features** Older torque converters like this one lack advanced cooling features found in modern units (e.g., internal cooling passages). In extreme towing or high-load scenarios, this could lead to overheating over time.

---

### **Conclusion:**

The **AC Delco 25619FQTB torque converter** is an excellent **OEM replacement** for the 1988-1991 Chevrolet K2500 with an automatic transmission, offering reliability, compatibility, and ease of installation. It is well-suited for **daily driving, light towing, and moderate hauling** without requiring performance modifications.

However, if you plan to **heavily tow, modify the engine, or push the transmission beyond stock limits**, consider upgrading to a **performance torque converter** (e.g., Mopar, ACDelco Performance, or aftermarket brands like **TorqueMaster or Carter**). These units provide better stall torque and heat management.

For most **stock or lightly modified K2500 owners**, the AC Delco unit is a **solid, cost-effective choice** that balances quality and affordability.

### **Recommendation:**

- **Buy from a reputable supplier** (e.g., RockAuto, Summit Racing, or a local GM parts dealer) to ensure authenticity.

- **Check for leaks or damage** upon receipt and inspect the transmission fluid before installation.

- **Use the correct fluid** (Dexron III/Mercon) and follow the **transmission service interval** (typically every 30,000 60,000 miles).

- **If towing frequently**, consider a **remanufactured or performance torque converter** for added durability.

For the average owner, the **AC Delco 25619FQTB is a reliable and recommended choice** for maintaining stock performance.

Details:

Some GM Genuine Parts may have formerly appeared as AcDelco Original Equipment OE. Parts Geek - For 1988 - 1991 Chevrolet K2500 Auto Trans Torque Converter AC Delco 25619FQTB: Review Fitment Notes to Ensure Proper Fit condition: RemanufActured Brand: Notes: Automatic Transmission Meets or Exceeds OEM Specifications: Yes Features: GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, Cadillac vehicle. GM regularly updates production and service part designs to integrate new materials technologies.

part #: 25619fqtb price

  • $445.72

specifications torquconv:

  • for makes: Chevrolet
  • for years: 1988-1991
  • brand: Ac Delco
  • mpn: 25619fqtb
  • part type: Torque Tran Converter
  • manufacturer warranty: 12 Month Warranty
  • notes: Automatic Transmission Torque Converter Remanufactured
  • years: 1988 1989 1990 1991
  • application: Chevrolet K2500 Auto Trans Torque Converter
  • product name 2: Automatic Transmission Torque Converter
  • cs-sku: 400

returns torquconv:

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

seller torquconv:

  • city: Hermiston, Oregon
  • rating: 98.8%
  • # reviews: 328816

shipping torquconv:

  • service: FedEx Ground / FedEx Home Delivery
  • transit: 4-7 Days
  • carrier: FedEx
  • type: Fixed
  • class: Standard
  • cost: $0.00

offer torquconv:

  • options: Ship-to-home
  • sold: 0
  • quantity: 1
  • started: April 17, 2026
  • availability: In Stock

payments torquconv:

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

general torquconv:

  • condition: RemanufActured
  • Car Truck Parts Accessories > Transmission Drivetrain > Torque Converters
for makes: chevrolet, for years: 1988-1991, part type: torque tran converter, manufacturer warranty: 12 month warranty, notes: automatic transmission torque converter remanufactured, years: 1988 1989 1990 1991, application: chevrolet k2500 auto trans torque converter, product name 2: automatic transmission torque converter, cs-sku: 400,
category: auto parts > car truck parts accessories > transmission drivetrain > torque converters, sku: 7282456719258793,
Ac Delco 25619FQTB Is Similar To:
torquconv logo
1 offer $445.72 USD
  • Remanufactured. Offer #1 priced at $445.72 + $0.00 shipping estimate = $445.72* total. FREE SHIPPING

Copyright © torquconv.com