Fluidyne Allison 1000 High Performance Transmission Fluid Cooler for 20-24 GM 6.6L Duramax L5P
This product is vehicle-specific. Select your year, make, model, engine and transmission to confirm compatibility before adding it to your cart.
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- Ships from Fluidyne High Performance
If you tow heavy, spend time in hot weather, or use your truck for demanding daily work, keeping transmission temperatures under control becomes a lot more important. This Fluidyne High Performance Transmission Fluid Cooler is designed to give your GM 6.6L Duramax significantly more cooling capacity than the factory setup, helping your transmission stay cooler and more consistent under load. With over 4 times the heat exchanging capacity of the stock cooler, it helps reduce heat buildup during towing, hauling, and long drives.
Built specifically for Chevy and GMC 2500HD and 3500HD trucks equipped with the 6.6L Duramax and Allison 1000 transmission, this direct bolt-in replacement installs at the factory mounting locations for a cleaner, easier installation process. The aerospace-grade aluminum bar plate construction, proprietary fin design, and extremely dense fins-per-inch layout maximize cooling performance while maintaining minimal pressure drop. Fully welded internal splitter plates help prevent contamination between hot- and cold-side fluids, improving durability and long-term reliability.
Finished in a durable silver powder coat with a proprietary heat-wicking compound, this dual-pass transmission cooler is built to handle demanding conditions while maintaining reliable performance. Featuring -10 AN female O-ring fittings, it’s a strong upgrade for Duramax owners looking for better cooling performance and added transmission protection.
If you tow heavy, spend time in hot weather, or use your truck for demanding daily work, keeping transmission temperatures under control becomes a lot more important. This Fluidyne High Performance Transmission Fluid Cooler is designed to give your GM 6.6L Duramax significantly more cooling capacity than the factory setup, helping your transmission stay cooler and more consistent under load. With over 4 times the heat exchanging capacity of the stock cooler, it helps reduce heat buildup during towing, hauling, and long drives.
Built specifically for Chevy and GMC 2500HD and 3500HD trucks equipped with the 6.6L Duramax and Allison 1000 transmission, this direct bolt-in replacement installs at the factory mounting locations for a cleaner, easier installation process. The aerospace-grade aluminum bar plate construction, proprietary fin design, and extremely dense fins-per-inch layout maximize cooling performance while maintaining minimal pressure drop. Fully welded internal splitter plates help prevent contamination between hot- and cold-side fluids, improving durability and long-term reliability.
Finished in a durable silver powder coat with a proprietary heat-wicking compound, this dual-pass transmission cooler is built to handle demanding conditions while maintaining reliable performance. Featuring -10 AN female O-ring fittings, it’s a strong upgrade for Duramax owners looking for better cooling performance and added transmission protection.
Diesel Power Products directs warranty claims to the respective manufacturer; coverage and duration depend on that manufacturer and product. Its one-year manufacturer-defect warranty applies only to products manufactured by Power Products Unlimited Inc., not all products it sells. Manufacturer inspection is required; DPP does not pay inspection/return shipping or labor.
Return and warranty information is based on what Diesel Power Products offers. Product-specific eligibility and the supplier’s published conditions apply; FullSpecDiesel does not add or extend coverage.
Diesel Power Products warranty policyView complete warrantyProduct conditions
Return and warranty information is based on what Diesel Power Products offers. Product-specific eligibility and the supplier’s published conditions apply; FullSpecDiesel does not add or extend coverage.
Professional installation is recommended.
- Return eligibility
- Diesel Power Products states a 30-day window from receipt for eligible new, uninstalled, unopened and complete items in original packaging, with prior approval/RMA. Custom tuners and specified opened tools are excluded. Customer pays return shipping; original outbound shipping, including initially free shipping, is deducted. No standard restocking percentage is stated for ordinary approved returns. Based on what Diesel Power Products offers.
- Return window
- Not stated for this product; see supplier terms
- Restocking fee
- See supplier terms; no product-specific fee stated
- Return shipping
- Based on the supplier’s return policy; see terms
- Made to order
- No
- Backorder status
- Not backordered
- Cancellation
- Subject to supplier terms; contact FullSpecDiesel before requesting cancellation
- Warranty provider
- Diesel Power Products
- Warranty duration
- Product-specific duration not stated; see supplier terms
- Compatibility
- Listed for specific vehicle configurations
- Legal use
- Street legal
- Processing estimate
- 3–7 business days supplier processing
- Shipping
- Shipping calculated at checkout
- Signature
- No signature requirement
- Supplier
- Diesel Power Products
Product compatibility is based on the vehicle and product information provided. Review your selected truck, product options, measurements, modifications, and installation requirements before ordering.