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MMTC-DMAX-11SL Mishimoto Heavy Duty Transmission Cooler - GM 2011-2014

Manufacturer: Mishimoto
Mishimoto's new transmission cooler for your 2011-2014 GMC/Duramax LML has 41% greater core volume and 73% greater external fin surface area over the stock OEM cooler. If you tow, then this cooler is a must!

PRODUCT DETAILS (click to expand)

Mftr. Part# MMTC-DMAX-11SL
UPC 811580034107
Weight (lbs.): 29.00 lbs.
Dimensions: 4.00" x 14.00" x 11.00"

PRODUCT SPECS (click to expand)

Product Type Transmission Cooler
Transmission Type Allison A1000
$588.00 (CAD)


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 its durable construction, this transmission cooler is significantly larger than the stock core. The Mishimoto transmission cooler boasts a 41% greater core volume, and 73% 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.


  • Direct fit for all 2011-2014 Chevrolet/GMC 6.6L Duramax (LML)
  • Stacked-plate construction for maximum durability and superior cooling
  • CNC-machined adapters make it easy to connect Mishimoto cooler to stock fluid lines or AN lines
  • 41% greater core volume than stock cooler
  • 73% greater external fin surface area over stock cooler
  • Mishimoto Lifetime Warranty

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