Fleece Transmission Cooler and Line Kit (FPE-TC-CUMM-0307) for 2003-2007 Cummins 5.9L

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The Fleece Performance (FPE-TC-CUMM-0307) Transmission Cooler and Line Kit is a high-performance upgrade for 2003–2007 Dodge Ram trucks with 5.9L Cummins engines. It features a high-capacity cooler and durable braided stainless steel lines that replace the stock rubber hoses, improving heat dissipation and reducing the risk of leaks. Designed for easy installation, this kit enhances transmission cooling, especially during heavy towing or performance use, helping to improve reliability and extend transmission life.

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Description

The Fleece Performance (FPE-TC-CUMM-0307) Transmission Cooler and Line Kit is a high-quality upgrade designed specifically for 2003-2007 Dodge Ram trucks equipped with the 5.9L Cummins engine. Engineered to improve transmission cooling efficiency, this kit includes a robust, high-capacity cooler and durable, braided stainless steel lines that replace the factory rubber hoses, which are prone to leaks and degradation over time. By enhancing heat dissipation and ensuring consistent fluid flow, the Fleece kit helps maintain optimal transmission temperatures, especially under heavy towing or performance applications. The direct-fit design ensures straightforward installation with minimal modifications, making it an excellent choice for Cummins owners looking to boost reliability and extend transmission life.

Additional information
Weight 10.0 lbs
Dimensions 34.0 × 13.0 × 3.0 in
Fitment

Fitment

  • 2003 Dodge Ram 2500/3500 5.9L 24V Cummins
  • 2004 Dodge Ram 2500/3500 5.9L 24V Cummins
  • 2004.5 Dodge Ram 2500/3500 5.9L 24V Cummins
  • 2005 Dodge Ram 2500/3500 5.9L 24V Cummins
  • 2006 Dodge Ram 2500/3500 5.9L 24V Cummins
  • 2007 Dodge Ram 2500/3500 5.9L 24V Cummins
Features

Features

  • Drop-in replacement for the factory transmission cooler with no cutting or splicing of OE lines.
  • Massive 2X increase in heat rejection and efficiency vs. stock!
  • 20% increase in face area of the transmission cooler vs. stock!
  • New heavy duty transmission lines and AN fittings for a leak-free installation. 
  • 100% pressure and leak tested. 
Installation

Installation

Installation Instructions

1 Year Limited Parts Warranty

 

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About brand
Fleece Performance Engineering is a diesel performance manufacturer focused on reliability and precision engineering. The company designs parts that solve common diesel issues while supporting added power. Fleece products support daily driving, towing, and performance diesel trucks. Fleece engineers fuel system components, turbochargers, electronics, and emissions-compliant upgrades in house. Their parts improve efficiency, drivability, and long-term engine protection. Each product is tested for proper fit and consistent performance. Diesel owners trust Fleece for dependable upgrades. Whether maintaining a work truck or building for performance, Fleece delivers proven solutions designed for real-world use.
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