SKU #: FL-TOC.A1000.0305 MPN #: TOC.A1000.0305

Fluidyne Allison 1000 High Performance Transmission Fluid Cooler 03-05 GM 6.6L Duramax LB7/LLY

Name: Fluidyne Allison 1000 High Performance Transmission Fluid Cooler 03-05 GM 6.6L Duramax LB7/LLY
Brand: Fluidyne
Price: 499.0 USD
Availability: InStock

$499.00

Get 499 points in loyalty rewards

Fluidyne Allison 1000 transmission cooler for 2003-2005 GM 6.6L LB7 LLY Duramax

Description

If you use your Duramax for towing, hauling, long road trips, or daily driving in warmer temperatures, transmission heat can become a bigger issue than most people expect. This Fluidyne Allison 1000 High Performance Transmission Fluid Cooler is designed to give GM 6.6L LB7 and LLY Duramax trucks a major increase in cooling capacity over the factory cooler, helping your Allison transmission stay cooler and more consistent under heavy use. Built with aerospace-grade aluminum bar plate construction and a proprietary high-efficiency fin design, this dual-pass cooler delivers over 4 times the heat exchanging capacity compared to the stock transmission cooler while maintaining minimal pressure drop. The dense fins-per-inch layout improves cooling efficiency, while fully welded internal splitter plates help prevent contamination between hot and cold side fluids for added long-term durability and reliability. This cooler is designed as a direct bolt-in replacement using the factory mounting locations for a cleaner and easier installation process. Finished in a durable silver powder coat with a proprietary heat-wicking compound, it is built to handle demanding towing conditions, heavy workloads, and everyday driving while helping protect your Allison 1000 transmission from excessive heat.

Enter your zip and we'll see if installation is available.

Request quotes from local installers at checkout
Compare options and choose the best fit for your install

Free Customer Loyalty Program

No Salesmen, Just Enthusiasts

If you use your Duramax for towing, hauling, long road trips, or daily driving in warmer temperatures, transmission heat can become a bigger issue than most people expect. This Fluidyne Allison 1000 High Performance Transmission Fluid Cooler is designed to give GM 6.6L LB7 and LLY Duramax trucks a major increase in cooling capacity over the factory cooler, helping your Allison transmission stay cooler and more consistent under heavy use.

Built with aerospace-grade aluminum bar plate construction and a proprietary high-efficiency fin design, this dual-pass cooler delivers over 4 times the heat exchanging capacity compared to the stock transmission cooler while maintaining minimal pressure drop. The dense fins-per-inch layout improves cooling efficiency, while fully welded internal splitter plates help prevent contamination between hot and cold side fluids for added long-term durability and reliability.

This cooler is designed as a direct bolt-in replacement using the factory mounting locations for a cleaner and easier installation process. Finished in a durable silver powder coat with a proprietary heat-wicking compound, it is built to handle demanding towing conditions, heavy workloads, and everyday driving while helping protect your Allison 1000 transmission from excessive heat.

Vehicle Fitment

2003-2005 GM 6.6L Duramax LB7/LLY

WARNING: Cancer & Reproductive Harm - P65Warnings.ca.gov

FEATURES & BENEFITS:

Helps reduce transmission temperatures during towing, hauling, and heavy driving.
Provides over 4 times the heat exchanging capacity compared to the factory cooler.
Dual-pass design improves cooling efficiency and temperature consistency.
Aerospace-grade aluminum construction adds strength and durability.
Dense fins-per-inch layout maximizes airflow and heat dissipation.
Fully welded internal splitter plates help prevent fluid contamination.
Direct bolt-in design uses factory mounting locations for easier installation.
Silver powder-coated finish with heat-wicking compound improves durability.
-10 AN female O-ring fittings support secure fluid connections.
Backed by a limited lifetime warranty from Fluidyne.

SPECIFICATIONS:

Length: 24.68"
Height: 8.38"
Depth: 2.25"
Make: Chevy, GMC
Model: 2500, 3500
Engine: 6.6L Duramax Diesel
Transmission: Allison 1000
Fluid Cooler Type: Universal
Cooler Construction: Bar Plate
Cooler Material: Aluminum
Cooler Color: Silver Powdercoated
Number Of Passes: Dual Pass
Inlet Size: -10 AN O-ring
Outlet Size: -10 AN O-ring
Inlet Attachment: Female O-ring
Outlet Attachment: Female O-ring
Fan Included: No
Notes: Direct Bolt In Allison 1000 High Performance Transmission Cooler

About Fluidyne High Performance

Fluidyne High Performance builds premium cooling solutions designed to keep diesel trucks running cooler and more reliably under demanding conditions. Manufactured in the USA, Fluidyne is known for producing high-quality aluminum radiators, transmission coolers, oil coolers, and heat exchangers for Ford Powerstroke, GM Duramax, and Ram Cummins applications. Built with performance and durability in mind, Fluidyne products feature precision TIG-welded construction, efficient core designs, and quality materials made to handle towing, heavy workloads, daily driving, and performance use. Whether your truck is stock or heavily modified, upgrading the cooling system can help maintain consistent temperatures and improve overall reliability when your truck is pushed hard. With decades of experience in high-performance cooling, Fluidyne has become a trusted choice for diesel owners looking for dependable temperature control and long-lasting performance. Diesel Power Products carries a wide range of Fluidyne cooling upgrades designed to help your truck stay protected on the street, on the job, or under load!