CSF 20009 Automatic Transmission Oil Cooler

CSF 20009 Automatic Transmission Oil Cooler

The CSF 20009 automatic transmission oil cooler is a parallel-flow unit built for controlled fluid temperature management in demanding driving conditions. It is a direct-fit style cooler for 2003-2009 Dodge Ram 2500 and 2003-2009 Dodge Ram 3500 applications, with tube-style inlet and outlet connections for straightforward integration.

Key Features

• Parallel-flow construction for efficient transmission fluid cooling
• Core thickness: 5/8 in.
• Core dimensions: 13 in. wide x 23 in. long
• Tube inlet and tube outlet connections
• Fits 2003-2009 Dodge Ram 2500 and 2003-2009 Dodge Ram 3500
• CSF Part Number: 20009

Product Details

Built around a 13-inch by 23-inch core with a 5/8-inch thickness, the CSF 20009 is sized for transmission cooling service in Dodge Ram 2500 and Dodge Ram 3500 trucks from 2003 through 2009. The parallel-flow design promotes consistent heat transfer across the core, helping maintain transmission fluid temperature under load, towing, and stop-and-go operation. This part cross-references Mopar (e.g., 52028915AF) for the same application.

Common Issues It May Address

• High transmission fluid temperatures during towing or hauling
• Heat-related transmission fluid breakdown
• Reduced cooling performance from a worn or restricted cooler
• Transmission temperature spikes in heavy-duty Dodge Ram use
• Replacement needs for damaged or leaking cooler assemblies

Installation Notes and Tips

Verify inlet and outlet tube routing before installation and compare the cooler dimensions to the original unit. Inspect surrounding lines, fittings, and mounting points for wear or contamination before connecting the new cooler. For best results, flush the transmission cooling circuit as needed so debris from the previous component does not remain in the system.

Quality Assurance

CSF is known for cooling-system components used across automotive applications, and this transmission oil cooler follows the listed construction and dimensional specifications for fitment-focused replacement work.