HomeBelts and Cooling > Radiators, Coolers and Related ComponentsCSF 20021 Automatic Transmission Oil Cooler
Part #: 20021

CSF 20021 Automatic Transmission Oil Cooler

⚙️ 20 vehicles fit this part
🔍
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$80.54Free Shipping
🚚Free ShippingNo Cost to Continental U.S.
🔄Free Returns*Wrong fit? No cost
🛡️60-Day ReturnsMoney back guarantee
*Free return shipping only qualifies if our fitment verification tool is used.
🔥
✅ In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Ford and Mercury, Explorer and Mountaineer
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST

Overview of CSF Automatic Transmission Oil Cooler 20021

The CSF Automatic Transmission Oil Cooler 20021 is designed to provide reliable cooling performance for Ford Explorer and Mercury Mountaineer vehicles. Featuring a parallel flow construction, this cooler helps maintain optimal transmission temperatures under various driving conditions.

  • Parallel flow construction for efficient heat dissipation
  • Core dimensions: 9 1/2 inches length, 7 3/4 inches width, 1 inch thickness
  • Compact box size: 15 1/3 inches length, 5 1/2 inches width, 13 4/7 inches height
  • Lightweight design at 4 lbs for easy handling
  • Equipped with tube-style inlet and outlet for secure connections
  • Non-hazardous material compliant

Detailed Product Description

The CSF 20021 automatic transmission oil cooler utilizes a parallel flow core design, which enhances the cooling efficiency by allowing transmission fluid to pass through multiple parallel channels. This design improves heat exchange and helps prevent transmission overheating. The core measures 9 1/2 inches in length, 7 3/4 inches in width, and 1 inch in thickness, providing a balanced surface area for effective cooling without excessive bulk. The cooler is housed in a compact box measuring approximately 15 1/3 inches long, 5 1/2 inches wide, and 13 4/7 inches high, making it suitable for installation in the engine bays of compatible vehicles. Both the inlet and outlet tubes are designed for tube connections, ensuring a secure and leak-resistant fit.

Compatible Vehicles and Applications

This automatic transmission oil cooler is compatible with select Ford and Mercury models, specifically the Ford Explorer and Mercury Mountaineer. It is intended for use in vehicles requiring an efficient transmission cooling solution to maintain transmission fluid temperature and extend transmission life.

  • Helps prevent transmission fluid overheating
  • Reduces risk of transmission failure due to excessive heat
  • Improves transmission performance under heavy load or towing conditions
  • Supports consistent transmission operation in hot climates
  • Replaces worn or damaged transmission oil coolers

Installation Notes and Tips

When installing the CSF 20021 transmission oil cooler, ensure that the inlet and outlet tubes are properly connected to the vehicle’s transmission fluid lines. Verify that the cooler is securely mounted in a location with adequate airflow to maximize cooling efficiency. It is recommended to inspect all fittings and hoses for leaks after installation. Professional installation is advised to maintain system integrity and performance.

Quality Assurance and Warranty

CSF manufactures this transmission oil cooler with durable materials and precise construction standards. The product is free from hazardous materials and designed to meet OEM specifications for Ford Explorer and Mercury Mountaineer models. While specific warranty details are not provided, CSF products typically come with a limited warranty against defects in materials and workmanship. Consult the product documentation or manufacturer for exact warranty terms.

BrandCSF
Part Number20021
Box Height (in)13 4/7
Box Length (in)15 1/3
Box Weight (lbs)4
Box Width (in)5 1/2
Constructionparallel flow
Core Length9 1/2
Core Thickness1
Core Width7 3/4
Hazardous MaterialNo
Inlet Tubetube
Outlet Tubetube

This part fits 20 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2001FordExplorer4.0LV6N/A
2001FordExplorer5.0LV8N/A
2001MercuryMountaineer4.0LV6N/A
2001MercuryMountaineer5.0LV8N/A
2000FordExplorer4.0LV6N/A
2000FordExplorer5.0LV8N/A
2000MercuryMountaineer4.0LV6N/A
2000MercuryMountaineer5.0LV8N/A
1999FordExplorer4.0LV6N/A
1999FordExplorer5.0LV8N/A
1999MercuryMountaineer4.0LV6N/A
1999MercuryMountaineer5.0LV8N/A
1998FordExplorer5.0LV8N/A
1998FordExplorer4.0LV6N/A
1998MercuryMountaineer4.0LV6N/A
1998MercuryMountaineer5.0LV8N/A
1997FordExplorer5.0LV8N/A
1997FordExplorer4.0LV6N/A
1996FordExplorer5.0LV8N/A
1996FordExplorer4.0LV6N/A

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

190135L5Z7A095AFO4050147

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.