1. Engine Cooling Components Deals
  2. sku: 19803838504011891
  3. CHEVROLET SMITLEY-390-14-036

CHEVROLET SMITLEY-390-14-036 Transmission Oil Cooler

fits model: 1500, Silverado. make: Chevrolet. year: 2008.

Smitley-390-14-036 Chevrolet 2008 Silverado 1500 Transmission Oil Cooler

( Manufacturer Part Number: SMITLEY-390-14-036 ), ( Part Type: Oil Transmission Cooler )

Review CHEVROLET Transmission Oil Cooler fits SILVERADO 1500 2008

The **Chevrolet Smiley 390-14-036 2008 Silverado 1500 Transmission Oil Cooler** is a meticulously engineered aftermarket accessory designed to enhance the performance, longevity, and reliability of the heavy-duty transmission system in your 2008 Chevrolet Silverado 1500, particularly those equipped with the robust 6-speed automatic transmission found in the 6.0L V8 or 6.2L V8 configurations. This high-performance oil cooler is crafted to address the thermal challenges faced by high-torque transmissions under demanding conditions, such as towing heavy loads, hauling large payloads, or operating in extreme climates where heat buildup can compromise fluid viscosity and lubrication efficiency. Constructed from premium materials, including durable aluminum cores and high-quality rubber hoses, this oil cooler ensures optimal heat dissipation while maintaining structural integrity and resistance to wear over extended periods of use. Its compact yet efficient design allows for seamless integration into the vehicle s existing cooling system, often requiring minimal modifications to the radiator or transmission bay, making it a practical solution for both off-road enthusiasts and daily drivers seeking to maximize their truck s performance. The oil cooler operates by diverting a portion of the transmission fluid through an external heat exchanger, where it is cooled by ambient air before being reintroduced to the transmission at a lower temperature. This process significantly reduces the risk of fluid breakdown, prevents premature wear on clutch packs and torque converters, and extends the lifespan of the transmission fluid itself, ultimately leading to smoother shifting, reduced heat-related stress, and improved overall durability. Whether you re pushing the limits on rugged terrain or simply looking to future-proof your Silverado s transmission against the rigors of daily use, this transmission oil cooler is an indispensable upgrade that combines engineering precision with practical performance benefits.

### **Pros and Cons of Buying a Chevrolet Smiley 390-14-036 (2008 Silverado 1500 Transmission Oil Cooler)**

#### **Pros:**

1. **OEM Compatibility** This is a genuine Chevrolet part designed specifically for the 2008 Silverado 1500 with the 6.0L V8 (L56 engine). It ensures proper fitment and performance without modifications.

2. **Improved Cooling Efficiency** The transmission oil cooler helps maintain optimal oil temperature, reducing wear on transmission components, especially in heavy-duty applications or high-temperature environments.

3. **Durability** Chevrolet parts are built to last, and this cooler is likely constructed from high-quality materials to withstand the demands of a heavy-duty truck.

4. **Warranty Coverage** If purchased new or from an authorized dealer, it may come with a factory-backed warranty, providing peace of mind against defects.

5. **Performance Benefits** Properly functioning transmission fluid cooling extends transmission life, improves shifting smoothness, and reduces the risk of overheating-related failures.

6. **Easy Installation** As an aftermarket or OEM replacement, it is designed to be installed without major modifications, though some basic mechanical skills may be required.

#### **Cons:**

1. **Cost** Genuine OEM parts can be more expensive than aftermarket alternatives, especially if purchased directly from Chevrolet or an authorized dealer.

2. **Potential Counterfeit Risks** If buying from an unverified seller, there is a risk of receiving a fake or low-quality part that may not perform as expected.

3. **Limited Availability** Depending on the region, this specific part may not be readily available at all dealerships, requiring online ordering or special ordering.

4. **Maintenance Requirement** While the cooler itself is durable, the transmission system still requires regular fluid changes and inspections to ensure long-term reliability.

5. **Installation Complexity** If the vehicle has not had the cooler replaced before, the installation process may involve removing the transmission pan, draining fluid, and ensuring proper sealing, which could be labor-intensive.

6. **Age of the Vehicle** The 2008 Silverado is now over a decade old, meaning the transmission may already be nearing the end of its service life. Replacing the cooler is a good preventive measure, but other components (e.g., solenoids, bearings) may still need attention.

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### **Conclusion**

The **Chevrolet Smiley 390-14-036 transmission oil cooler** is a solid choice for owners of a 2008 Silverado 1500 with a 6.0L V8 who want to ensure their transmission stays cool and reliable. The benefits of improved cooling and extended transmission life outweigh the higher cost and potential installation challenges, especially for heavy-duty or high-mileage trucks. However, buyers should verify the part s authenticity, consider the overall condition of the transmission, and ensure proper installation to maximize its effectiveness.

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### **Recommendation**

- **Buy from a trusted source** Purchase the part from an authorized Chevrolet dealer, a reputable online retailer (e.g., RockAuto, Summit Racing), or a well-reviewed aftermarket supplier to avoid counterfeit items.

- **Check transmission health** Before installing the cooler, have the transmission fluid tested and consider a full fluid change if it s overdue. Inspect for leaks or wear in other components.

- **DIY or professional installation?** If comfortable with basic mechanical work, the installation can be done at home with the right tools. Otherwise, a transmission specialist can ensure a proper fit and seal.

- **Consider aftermarket alternatives** If budget is a concern, high-quality aftermarket coolers (e.g., from Mopar, ACDelco, or performance brands like ARP) may offer similar benefits at a lower cost.

- **Monitor performance post-installation** After installation, keep an eye on transmission temperature and shifting behavior to confirm the cooler is functioning as intended.

**Final Verdict:** If the transmission is otherwise in good condition, this is a worthwhile upgrade for preventing overheating and prolonging transmission life. Just ensure proper sourcing and installation.

Details:

Notes of the part or noticeable wear -, DIRTY, BENT FINS, WITH BOLTS AND CLIPS, SCUFFS, SCRATCHES, corrosion. View other parts for this year make and model. Vehicle Make: Chevrolet. Vehicle Year: 2008.

View other parts from this vehicle. Vehicle model: Silverado 1500.

part #: smitley39014036 price

  • $64.99

specifications ocoosys:

  • for models: 1500, Silverado
  • for makes: Chevrolet
  • for years: 2008
  • mpn: Smitley-390-14-036
  • part type: Oil Transmission Cooler

payments ocoosys:

  • other
  • credit card: Mastercard
  • wallet: Google-pay

shipping ocoosys:

  • service: Standard
  • type: Fixed
  • class: Standard
  • transit: 4-8 Days
  • cost: $0.00

returns ocoosys:

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

general ocoosys:

  • condition: Used
  • Car Truck Parts Accessories > Engine Cooling Components > Other Engine Cooling Components

offer ocoosys:

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

seller ocoosys:

  • city: Orrville, Ohio
  • # reviews: 1558
  • rating: 99.8%
for models: 1500, silverado, for makes: chevrolet, for years: 2008, part type: oil transmission cooler,
category: auto parts > car truck parts accessories > engine cooling components, sku: 19803838504011891,
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1 offer $64.99 USD
  • Used. Offer #1 priced at $64.99 + $0.00 shipping estimate = $64.99* total. View other parts for this year make and model. Vehicle Model: Silverado 1500.FREE SHIPPING

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