1. Engine Crankshafts Products
  2. sku: 20246352170729603
  3. DORMAN OE SOLUTIONS SX-6445

DORMAN OE SOLUTIONS SX-6445 Engine Harmonic Balancer Pulley Workhorse Fastrack Ld

fits year: 2002–2005.

Sx-6445 Dorman - Oe Solutions Engine Harmonic Balancer Pulley For 2002-2005 Workhorse Fastrack Ld

( Brand: Dorman Oe Solutions ), ( Manufacturer Part Number: SX-6445 ), ( Manufacturer Warranty: 1 Year / 2 Years / 3 Years / 5 Years Depending On Part ), ( Item Weight: 3.8500 ), ( Ipn: C512 22-37 ), ( Placement On Vehicle: Engine Cylinder Block ), ( Compatible Make: Workhorse ), ( Compatible Model: Fastrack Ft1601 ), ( Compatible Year: 2005 2004 2003 2002 ), ( Core Charge: Free No Core Charge ), ( Type: Engine Harmonic Balancer Pulley ), ( Fitment Type: Direct Replacement ), ( Bundle Description: 1 Pc Genuine Dorman Engine Harmonic Balancer Pulley )

Review DORMAN OE SOLUTIONS Engine Harmonic Balancer Pulley Workhorse Fastrack Ld fits 2002–2005

The **Dorman SX-6445 Engine Harmonic Balancer Pulley** is a precision-engineered replacement part designed specifically for the **2002 2005 Workhorse FastRack LD** models featuring the **6.6L Duramax diesel engine**. This high-performance component is meticulously crafted to restore optimal balance and vibration dampening to the crankshaft assembly, ensuring smooth operation and longevity of your engine s critical rotating components. Engineered from high-strength steel and reinforced with a durable rubber insert, the harmonic balancer pulley is built to withstand the demanding torque and RPM demands of heavy-duty diesel applications while minimizing harmful vibrations that can lead to premature wear on belts, pulleys, and connected accessories. The Dorman part is a direct-fit replacement, meticulously matched to the original equipment specifications, including the correct bolt pattern, mounting holes, and alignment notches, guaranteeing a seamless installation without the need for modification. Its robust construction helps mitigate torsional vibrations, reducing stress on the engine block, transmission, and drivetrain, thereby enhancing overall drivability and protecting against costly internal damage. Whether you're performing routine maintenance or addressing a worn-out or damaged harmonic balancer, the Dorman SX-6445 offers a reliable, long-lasting solution that meets or exceeds OEM standards, ensuring your Workhorse FastRack LD continues to deliver dependable performance for years to come.

**Pros and Cons of buying a Dorman SX-6445 Engine Harmonic Balancer Pulley for a 2002-2005 Workhorse FastRack LD**

### **Pros:** The Dorman SX-6445 harmonic balancer pulley is a widely recognized aftermarket part with several advantages for your 2002-2005 Workhorse FastRack LD:

1. **Compatibility and Fitment** Dorman is a trusted brand that specializes in OEM-quality replacements, ensuring the SX-6445 will fit your Cummins ISB engine without modification. It is designed specifically for the FastRack LD series, reducing the risk of installation issues.

2. **Durability and Performance** Dorman parts are built to meet or exceed factory specifications, using high-quality materials like steel and rubber compounds that resist wear, cracking, and vibration. This helps maintain engine smoothness and longevity, especially important for diesel engines under heavy loads.

3. **Warranty Coverage** Dorman offers a standard warranty (typically 12 months or 12,000 miles), providing peace of mind against premature failure. Some dealers or distributors may extend this further, depending on the retailer.

4. **Ease of Installation** The pulley is designed for straightforward replacement, requiring only basic tools. No special equipment or expertise is needed, making it a DIY-friendly upgrade for those comfortable with engine work.

5. **Cost-Effective Alternative to OEM** While not always cheaper than a genuine Cummins part, the SX-6445 is often priced competitively compared to aftermarket alternatives, offering a balance between quality and affordability.

6. **Reduced Vibration and Noise** A failing harmonic balancer can cause excessive vibration and rattling, which this replacement helps eliminate, improving ride comfort and reducing stress on connected components like the serpentine belt system.

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### **Cons:** While the Dorman SX-6445 is a solid choice, there are some potential drawbacks to consider:

1. **Quality Variability** Like many aftermarket parts, the quality can vary slightly depending on the manufacturing batch or retailer. Some users report minor inconsistencies in rubber hardness or balancing, though these issues are rare with reputable sellers.

2. **Limited Customization** The SX-6445 is a standard replacement and does not offer performance upgrades (e.g., lighter weight or reinforced construction) that some enthusiasts might seek for high-RPM applications. If you re running extreme modifications, an OEM or high-end aftermarket part may be preferable.

3. **Potential for Counterfeit Parts** Purchasing from untrusted sellers (e.g., third-party online marketplaces without return policies) could result in counterfeit or low-quality knockoffs. Always buy from authorized dealers or reputable retailers like RockAuto, Summit Racing, or Cummins dealerships.

4. **Installation Risks** If the engine has been previously modified or if the mounting surfaces are corroded, improper installation could lead to premature wear or failure. Ensuring the crankshaft keyway and bolt holes are clean and undamaged is critical.

5. **Warranty Limitations** Dorman s warranty may not cover damage caused by improper installation or incompatible modifications. Always follow the installation instructions carefully.

6. **Lead Time** Depending on the retailer, stock availability can vary, and some locations may require backorders, delaying your project.

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### **Conclusion:**

The Dorman SX-6445 harmonic balancer pulley is an excellent choice for your 2002-2005 Workhorse FastRack LD, offering a reliable, OEM-quality replacement that enhances engine smoothness and durability. Its compatibility, warranty, and ease of installation make it a practical option for both DIYers and professional mechanics. However, it is not without minor drawbacks, primarily related to potential quality inconsistencies if sourced improperly or limited customization for extreme applications.

For most users, the pros outweigh the cons, especially when purchasing from a trusted retailer. If you prioritize longevity and ease of use, the Dorman part is a strong recommendation. If you re running a heavily modified engine or need performance-specific upgrades, consider consulting with a Cummins specialist or exploring higher-end alternatives.

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### **Recommendation:**

**Buy the Dorman SX-6445 from an authorized dealer or reputable online retailer** (e.g., RockAuto, Summit Racing, or a Cummins-certified parts store). Verify the part number and ensure the seller offers a return policy in case of fitment issues. Follow the manufacturer s installation guidelines closely, and consider replacing the serpentine belt and tensioner as a preventive measure, as these components often wear in tandem with the harmonic balancer. If you re unsure about installation, consult a mechanic familiar with Cummins engines. This part is a cost-effective, high-quality solution for maintaining your FastRack LD s performance.

Details:

Dorman Engine Harmonic Balancer Pulley for 2002 - 2005 Workhorse FasTrack ld: Status: In Stock.

part #: sx6445 prices

  • $41.66-$54.23

specifications cranshafengin:

  • for years: 2002-2005
  • brand: Dorman Oe Solutions
  • mpn: Sx-6445
  • manufacturer warranty: 1 Year / 2 Years / 3 Years / 5 Years Depending On Part
  • item weight: 3.8500
  • ipn: C512 22-37
  • placement on vehicle: Engine Cylinder Block
  • compatible make: Workhorse
  • compatible model: Fastrack Ft1601
  • compatible year: 2005 2004 2003 2002
  • core charge: Free No Core Charge
  • type: Engine Harmonic Balancer Pulley
  • fitment type: Direct Replacement
  • bundle description: 1 Pc Genuine Dorman Engine Harmonic Balancer Pulley

payments cranshafengin:

  • credit card: Diners-club
  • other
  • wallet: Apple-pay

shipping cranshafengin:

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

seller cranshafengin:

  • rating: 99.6%
  • # reviews: 654720
  • city: Indianapolis, Indiana

general cranshafengin:

  • Car Truck Parts Accessories > Engines Engine Parts > Crankshafts
  • condition: New

offer cranshafengin:

  • options: Ship-to-home
  • sold: 0
  • quantity: 2
  • started: May 8, 2026
  • availability: In Stock

returns cranshafengin:

  • policy: Returns Accepted
  • time: 30 Days
  • paid by: Seller
for years: 2002-2005, manufacturer warranty: 1 year / 2 years / 3 years / 5 years depending on part, item weight: 3.8500, placement on vehicle: engine cylinder block, compatible make: workhorse, compatible model: fastrack ft1601, compatible year: 2005 2004 2003 2002, core charge: free no core charge, type: engine harmonic balancer pulley, fitment type: direct replacement, bundle description: 1 pc genuine dorman engine harmonic balancer pulley,
category: auto parts > car truck parts accessories > engines engine parts > crankshafts, sku: 20246352170729603,
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