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Randy's Transmissions  |  SKU: RT-A1-2024

FLUIDYNE HEAVY DUTY TRANSMISSION COOLER - 20-24 L5P DURAMAX

Regular price USD 49900

Can I pick up my order or have it installed at your shop?

Absolutely. We offer local pickup on most products and full professional installation at our shop in Washington, MO. Whether you just want to grab your parts or have our techs handle the install, we’ve got you covered. Give us a quick call at 636-429-7020 or message us to schedule a visit — we’ll make sure the parts are ready when you arrive.

How do I know if this part fits my vehicle?

Unsure if it’ll fit? No problem — that’s what we’re here for. Send us your vehicle’s year, make, and model, and we’ll verify fitment before you order. We can also point you toward compatible upgrades or supporting parts if needed.

What if I need to return a product or it’s defective?

Most unused items can be returned within 30 days in their original packaging. Some products are covered by a manufacturer’s warranty as well. If something arrives damaged or doesn’t meet your expectations, just let us know — we’ll help you get it replaced, refunded, or repaired. (Tracking updates are also emailed automatically once your order ships.)

What's the lead time on custom or fabricated parts?

Many of our parts are built to order — especially fabricated or performance components. These can take additional time to produce before shipping. Lead times vary by manufacturer and demand, but we’ll always keep you updated along the way. If you’re working on a tight schedule, reach out before ordering at 636-429-7020 and we’ll confirm current availability or estimated ship dates.

Description

Excessive heat is a major factor in transmission failure, leading to a shortened lifespan and costly repairs. Unfortunately, OEM transmission coolers often lack the efficiency needed to manage heat effectively, especially under heavy use. To safeguard your transmission and prolong its life, upgrading to a more advanced cooling system is essential.

The Fluidyne High Performance Bar and Plate Transmission Fluid Cooler, designed specifically for the 2020-2024 GM 6.6L L5P Duramax, offers a significant upgrade with four times the heat dissipation capacity of factory models. This ensures your transmission stays cooler and operates more efficiently, even in the most demanding conditions.

Featuring the densest fin count per inch available on the market, the Fluidyne cooler delivers superior cooling performance. Its fully welded internal splitter plates prevent cross-contamination between hot and cold fluid streams, maintaining the effectiveness and purity of your transmission fluid. Constructed from aerospace-grade aluminum with a bar and plate design, this cooler maximizes heat exchange while minimizing pressure drop.

Designed for direct bolt-in replacement, the cooler uses your existing factory mounts for a hassle-free installation. It’s finished with a proprietary heat-wicking powder coat that further enhances thermal efficiency. Backed by a limited lifetime warranty, the Fluidyne High Performance Cooler ensures reliable, long-lasting performance for your 2020-2024 L5P Duramax.

Key Features:

  • Over four times the heat dissipation capacity compared to stock coolers
  • Direct bolt-in replacement for easy installation
  • Maximum fin density for superior cooling
  • Fully welded internal splitter plates to prevent fluid contamination
  • Tested up to 250 PSI against leaks and ensure optimal performance. 
  • Aerospace-grade aluminum with bar and plate construction for optimal durability
  • Proprietary fin design for enhanced thermal performance
  • Powder-coated with a specialized heat-wicking compound
  • Limited lifetime warranty for peace of mind