Dorman 918-258 Automatic Transmission Oil Cooler - Auxiliary

Overview of Dorman 918-258 Automatic Transmission Oil Cooler

The Dorman 918-258 automatic transmission oil cooler is designed to provide reliable cooling performance for Dodge Ram 2500 and Ram 3500 models. Engineered with durable aluminum construction and a black finish, this cooler helps maintain optimal transmission temperatures under demanding conditions.

• Compatible with Dodge Ram 2500 and Ram 3500
• Constructed from corrosion-resistant aluminum
• Core features 15 rows for efficient heat dissipation
• Compact dimensions: 7.17 inches height, 18.03 inches width, 0.642 inches depth
• 0.5 inch inlet and outlet diameters with hose barb attachment
• Standard replacement grade for dependable performance
• Installation hardware not included

Detailed Product Description

This Dorman automatic transmission oil cooler (part number 918-258) is built to meet the cooling needs of heavy-duty Dodge Ram 2500 and Ram 3500 trucks. The cooler’s aluminum core with 15 rows ensures effective heat transfer, helping to prevent transmission overheating during towing or heavy load operation. Its black finish offers corrosion resistance, extending the service life of the component. The cooler measures 7.17 inches in height, 18.03 inches in width, and 0.642 inches in depth, making it a compact yet efficient solution. Both the inlet and outlet have 0.5 inch diameters with hose barb attachments, facilitating straightforward connection to existing transmission fluid lines.

Common Applications and Problem Solving

• Prevents transmission fluid overheating during heavy towing or hauling
• Reduces risk of transmission failure caused by excessive heat
• Maintains consistent transmission fluid temperature for smoother shifting
• Replaces worn or damaged transmission oil coolers in Dodge Ram 2500 and 3500
• Helps extend transmission component lifespan by improving cooling efficiency

Installation Notes and Tips

When installing the Dorman 918-258 transmission oil cooler, ensure compatibility with your Dodge Ram 2500 or Ram 3500 model year and transmission type. The cooler uses hose barb inlet and outlet fittings sized at 0.5 inches, so verify hose compatibility before installation. Note that installation hardware is not included, so you may need to reuse existing clamps or purchase appropriate fittings separately. Properly secure all connections to prevent leaks and ensure optimal cooling performance.

Quality Assurance and Warranty

Dorman provides this automatic transmission oil cooler as a standard replacement part, manufactured to meet OEM specifications for fit and function. The aluminum construction and corrosion-resistant finish contribute to long-term durability. While specific warranty details may vary, Dorman typically offers limited warranties on replacement parts to cover defects in materials and workmanship.