Mishimoto misMMTC-DMAX-11SL 11-14 Chevrolet/GMC 6.6L Duramax LML Transmission Cooler

There's no greater enemy for a transmission than heat. Whether your 2011-2014 Chevy/GMC 6.6L Duramax is a dedicated tow vehicle, hardworking fleet truck, or a daily driver with a liking for the drag-strip, you need to ensure that your transmission runs cool. Luckily, Mishimoto has developed a direct-fit transmission cooler to do just that. Our 2011-2014 Chevy/GMC 6.6L Duramax transmission cooler utilizes a stacked-plate design for maximum durability and powerful cooling. Aside from It's durable construction, this transmission cooler is significantly larger than the stock core. The Mishimoto transmission cooler boasts a 41-percent greater core volume, and 73-percent greater fin surface area than the stock 2011-2014 Duramax transmission cooler. The included CNC-machined adapters connect directly to the stock transmission cooler lines for leak-free cooling. Direct-fit brackets and tailor-made hoses make installation easy. Like all Mishimoto products, this transmission cooler is backed up by our Lifetime Warranty with Accident Protection for worry free cooling as long as you own it. Automatic transmission oil cooler designed to regulate fluid temperature and prevent overheating. Enhances transmission longevity, maintains performance, and features durable construction with a precise fit.

• CNC-machined adapters make it easy to connect Mishimoto cooler to stock fluid lines or AN lines
• Direct-fit for all 2011-2014 Chevrolet/GMC with Allison transmission (LML)
• Stacked-plate construction for maximum durability and superior cooling

Help regulate transmission fluid temperature in your 2011-2014 Chevrolet or GMC 6.6L Duramax with the Mishimoto misMMTC-DMAX-11SL transmission cooler. Designed as a direct-fit replacement for vehicles equipped with the Allison transmission, this cooler supports consistent transmission performance and helps reduce the risk of overheating during towing, fleet use, daily driving, or drag-strip operation.

Key Features & Performance Benefits

• Enhanced Cooling Capacity: The core provides 41% greater volume and 73% greater fin surface area than the stock 2011-2014 Duramax transmission cooler.
• Durable Stacked-Plate Design: Stacked-plate construction delivers durability and effective heat transfer.
• Direct-Fit Installation: Direct-fit brackets and tailor-made hoses support straightforward installation.
• Flexible Line Connections: CNC-machined adapters connect the cooler to stock fluid lines or AN lines.

Key Product Specifications & Technical Data

• Brand: Mishimoto
• Part Number: misMMTC-DMAX-11SL
• Product Type: Automatic transmission oil cooler
• Application: 6.6L Duramax LML
• Transmission: Allison
• Construction: Stacked-plate
• Core Volume: 41% greater than the stock cooler
• Fin Surface Area: 73% greater than the stock cooler

What's Included in the Box

The product data identifies direct-fit brackets, tailor-made hoses, and CNC-machined adapters as part of the cooler installation setup. A complete box contents list is not otherwise provided.

Fitment

Direct-fit for 2011-2014 Chevrolet and GMC vehicles with the 6.6L Duramax LML engine and Allison transmission. Listed fitment includes 2011 Chevrolet Silverado 3500 HD, 2011 GMC Sierra 3500 HD, and 2011 GMC Sierra 2500 HD.

Fitments:
2011 Chevrolet Silverado 2500 HD LT
2011 Chevrolet Silverado 2500 HD LTZ
2011 Chevrolet Silverado 2500 HD WT
2011 Chevrolet Silverado 3500 HD LT
2011 Chevrolet Silverado 3500 HD LTZ
2011 Chevrolet Silverado 3500 HD WT
2011 GMC Sierra 2500 HD Denali
2011 GMC Sierra 2500 HD SLE
2011 GMC Sierra 2500 HD SLT
2011 GMC Sierra 2500 HD WT
2011 GMC Sierra 3500 HD Denali
2011 GMC Sierra 3500 HD SLE
2011 GMC Sierra 3500 HD SLT
2011 GMC Sierra 3500 HD WT
2012 Chevrolet Silverado 2500 HD LT
2012 Chevrolet Silverado 2500 HD LTZ
2012 Chevrolet Silverado 2500 HD WT
2012 Chevrolet Silverado 3500 HD LT
2012 Chevrolet Silverado 3500 HD LTZ
2012 Chevrolet Silverado 3500 HD WT
2012 GMC Sierra 2500 HD Denali
2012 GMC Sierra 2500 HD SLE
2012 GMC Sierra 2500 HD SLT
2012 GMC Sierra 2500 HD WT
2012 GMC Sierra 3500 HD Denali
2012 GMC Sierra 3500 HD SLE
2012 GMC Sierra 3500 HD SLT
2012 GMC Sierra 3500 HD WT
2013 Chevrolet Silverado 2500 HD LT
2013 Chevrolet Silverado 2500 HD LTZ
2013 Chevrolet Silverado 2500 HD WT
2013 Chevrolet Silverado 3500 HD LT
2013 Chevrolet Silverado 3500 HD LTZ
2013 Chevrolet Silverado 3500 HD WT
2013 GMC Sierra 2500 HD Denali
2013 GMC Sierra 2500 HD SLE
2013 GMC Sierra 2500 HD SLT
2013 GMC Sierra 2500 HD WT
2013 GMC Sierra 3500 HD Denali
2013 GMC Sierra 3500 HD SLE
2013 GMC Sierra 3500 HD SLT
2013 GMC Sierra 3500 HD WT
2014 Chevrolet Silverado 2500 HD LT
2014 Chevrolet Silverado 2500 HD LTZ
2014 Chevrolet Silverado 2500 HD WT
2014 Chevrolet Silverado 3500 HD LT
2014 Chevrolet Silverado 3500 HD LTZ
2014 Chevrolet Silverado 3500 HD WT
2014 GMC Sierra 2500 HD Denali
2014 GMC Sierra 2500 HD SLE
2014 GMC Sierra 2500 HD SLT
2014 GMC Sierra 2500 HD WT
2014 GMC Sierra 3500 HD Denali
2014 GMC Sierra 3500 HD SLE
2014 GMC Sierra 3500 HD SLT
2014 GMC Sierra 3500 HD WT

Air Freight Prohibited: false
Not Carb Approved: false
Ltl Freight Required: false
Prop 65: Y
Part Type: automotive
Epa: N/A
Carb Acknowledgement Required: false
Regular Stock: t
Units Per Sku: 1