Fluidyne High Performance Transmission Cooler — Dodge Ram 2003–2009 (5.9L / 6.7L Cummins)

Upgrade your Dodge Ram’s transmission cooling with Fluidyne High Performance’s stacked-plate transmission cooler engineered for 2003–2009 Ram trucks equipped with 5.9L or 6.7L Cummins engines. Backed by decades of cooler design experience, this unit improves thermal control for towing, heavy use, and demanding driving conditions.

Fitment: Dodge Ram 2003–2009 — 5.9L & 6.7L Cummins
Application: Transmission fluid cooling

Key Features

  • Enhanced Cooling Efficiency: Stacked-plate design providing approximately 4× the core area versus conventional tube-and-fin coolers for superior heat dissipation.
  • Increased Fluid Capacity: Greater internal volume helps reduce temperature spikes and improves overall cooling stability.
  • Durable Construction: Precision-fabricated from high-quality materials for long-lasting performance under heavy-duty use.
  • Proprietary Geometry: Optimized fin and plate design for maximum heat transfer with minimal pressure drop.
  • Protective Finish: Powder coat with a heat-wicking compound for corrosion resistance and improved thermal performance.
  • Easy Installation: Engineered to integrate with existing system layouts; direct-fit or uses factory mounting points where applicable.
  • Limited Lifetime Warranty: Backed by Fluidyne (see manufacturer terms).

Why Choose Fluidyne?

  • Over 30 years of leadership in cooling technology
  • Trusted by professional motorsports — Fluidyne coolers are used across multiple racing classes
  • Designed to perform in towing, hauling, and continuous high-heat environments

What to Expect

Installing a Fluidyne stacked-plate cooler will lower transmission operating temperatures, reduce thermal stress on internal components, and provide more consistent performance during towing and sustained high-load conditions. The design balances high core area and fluid capacity while minimizing pressure drop for reliable operation.

Installation & Notes

  • Engineered for straightforward installation — many applications use factory mounts or require minimal adaptation.
  • Verify part-specific fitment for trucks with aftermarket bumpers, winches, or altered front-end components that may affect clearance.
  • Consult Fluidyne's fitment guide or contact Fluidyne support for vehicle-specific mounting details and part numbers.

Upgrade your Dodge Ram’s cooling capabilities with Fluidyne High Performance and enjoy improved transmission reliability and longevity on- and off-road.