Mishimoto MMTC-DMAX-06SL Stacked Plate Transmission Cooler for 2006-2010 Duramax

Vehicle Fitment

• 2006-2010 Chevrolet Silverado 2500/3500 HD w/ 6.6L Duramax (LBZ/LMM)
• 2006-2010 GMC Sierra 2500/3500 HD w/ 6.6L Duramax (LBZ/LMM)

Features

• Direct-fit transmission cooler engineered for Duramax 6.6L Allison systems
• Stacked-plate core design for maximum durability and enhanced cooling performance
• CNC-machined adapters ensure leak-free connection to factory transmission lines
• 84 % greater core volume than stock cooler for improved heat dissipation
• 125 % greater external fin surface area than stock unit for superior airflow
• Includes direct-fit brackets, hoses, and hardware for straightforward installation
• High-quality aluminum construction resists corrosion and thermal stress
• Backed by Mishimoto Lifetime Warranty with accident protection

Specifications

• Part Number: MMTC-DMAX-06SL
• Material: 6061 aluminum stacked-plate core
• Core Length: 27.95" (70.9 cm)
• Core Height: 5.78" (14.7 cm)
• Core Thickness: 1.25" (3.2 cm)
• Rows: 13 rows for enhanced cooling capacity
• Finish: Silver powder coat
• Transmission: Allison automatic (Duramax applications)

Included Components

• 1x Mishimoto stacked-plate transmission cooler
• 2x CNC-machined quick-disconnect to hose barb adapters
• 2x Stock-style quick-disconnect fittings
• 2x Transmission hoses
• 4x Worm gear clamps
• Mounting hardware kit
• Mishimoto Lifetime Warranty documentation

Product Description

The Mishimoto MMTC-DMAX-06SL Stacked Plate Transmission Cooler is a direct-fit performance upgrade for 2006-2010 Chevrolet Silverado and GMC Sierra 2500/3500 HD trucks equipped with the 6.6L Duramax (LBZ/LMM) diesel and Allison automatic transmission. Designed to keep transmission fluid temperatures under control, this heavy-duty cooler greatly increases core volume and fin surface area compared to the stock unit - improving heat dissipation and reducing the risk of overheating during towing, hauling, or heavy-duty use.

Featuring rugged 6061 aluminum construction with a stacked-plate core, CNC-machined adapters, and all necessary hoses and mounting hardware, the MMTC-DMAX-06SL delivers reliable cooling performance in demanding conditions. Installation is straightforward with direct-fit brackets and factory-compatible connections, making it a practical upgrade for Duramax owners seeking improved transmission longevity and reliability. Backed by Mishimoto's Lifetime Warranty with accident protection, it's engineered to handle high thermal loads with confidence.