FLUIDYNE HEAVY DUTY TRANSMISSION COOLER - 2020-2024 L5P DURAMAX (Copy)
FLUIDYNE HEAVY DUTY TRANSMISSION COOLER - 2020-2024 L5P DURAMAX (Copy)
Couldn't load pickup availability
- Fully secure checkout
- Trusted by thousands
- Rated and reviewed
Take your ride to the NEXT LEVEL!
FLUIDYNE HEAVY DUTY TRANSMISSION COOLER - 2020-2024 L5P DURAMAX (Copy)
- Fluidyne high performance bar-plate transmission cooler
- 20-24 L5P DURAMAX
- Up to 20° Lower Temps
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 ensured 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
Installation Note:
To maintain your warranty, a hot flush machine must be used if reusing an old cooler. For best results — and a truly one-and-done solution — replace your old cooler with a new Fluidyne unit designed to match your one-and-done transmission.
Warranty & Returns
Warranty & Returns
For Next Level Products:
*We accept returns within 10 days of receipt, as long as the transmission is in like-new condition and has not been installed. Please note that a 25% restocking fee applies, and customers are responsible for return shipping costs.
PLEASE GO HERE FOR MORE DETAILED INFO. & WARRANTY // RETURN INFO. FOR ALL PRODUCTS.
Transmission Shipping
Transmission Shipping
Freight cost on shipping Transmissions is currently $875.00 to the lower 48 states but Next Level Engine & Transmission reserves the right to raise prices according to “going rates”. Freight costs are to cover shipping of the built unit and the return core. Cores must be returned within 2 weeks of receiving the new transmission.
All cores are inspected for damage such as broken cases, broken shafts, excessive hard part failure. Next Level Engine & Transmission will deduct the cost of these replacement parts from the core money. Prices are based on replacement costs only. We are not interested in making money on broken parts only returning cores to a buildable state.
Whenever possible, Next Level Engine & Transmission will supply a core return tag for parts that have core charges associated with them. Return shipping costs are factored into the final shipping costs on your invoice. Parts cores are expected to be returned within 10 days. Do not just assume that if your part is damaged that you will not receive a core return. Many parts are expected to have damage and are returned to the manufacturer as such.
VIEW OUR FULL SHIPPING POLICY HERE.
Core Refunds
Core Refunds
All cores are paid out as soon as possible. All cores will be inspected before a refund will be issued. Refunds are issued 1-2 weeks after inspection via direct deposit or other form or payment discussed with accounting department.
PLEASE GO HERE FOR FULL CORE RETURN INFORMATION AND DOCUMENTS.
INSTALL DOCUMENTS
INSTALL DOCUMENTS
PLEASE GO HERE FOR ALL PRODUCT INSTALLATION DOCUMENTS.
FAQs
FAQs
PLEASE GO HERE FOR ALL FAQs.
Shop safely
Secure your shopping experience with various safe and trusted payment methods.

Shopping Safely
At our Shopify store, we prioritize your safety and security. Here's how we ensure a secure shopping experience:
1. Secure Transactions: We use advanced encryption to protect your personal and payment information, ensuring it is safely transmitted and safeguarded.
2. Trusted Payment Gateways: Our store integrates with trusted payment gateways, ensuring your transactions are processed securely and efficiently.
3. Data Privacy: Your privacy is our top priority. We follow strict data protection policies to keep your personal information confidential and secure.
4. Secure Platform: Shopify provides robust security features and continuous monitoring against vulnerabilities, ensuring a safe shopping environment.
5. Verified Merchants: We are a verified merchant on Shopify, committed to providing authentic and high-quality products.
6. Transparent Policies: Our clear return, refund, and shipping policies provide peace of mind, knowing we stand behind our products.
7. Customer Support: Our dedicated customer support team is ready to assist with any concerns or questions you may have.
Shop confidently at our Shopify store, where your safety and satisfaction are our top priorities.