Mishimoto Transmission Cooler 03-05 GM 6.6L Duramax LB7 / LLY
SKU: 91702114784

Mishimoto Transmission Cooler 03-05 GM 6.6L Duramax LB7 / LLY

Sale price$323.55 Regular price$359.50
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Ships within 48 hours · Estimated delivery Jul 8 - Jul 13

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Description

Mishimoto Transmission Cooler 03-05 GM 6.6L Duramax LB7 / LLYSo you drive your Duramax a little hard sometimes, huh? Well one thing you shouldnt overlook is how hot your Transmission becomes when you do. Luckily Mishimoto has designed a solution to that problem: a direct fit transmission cooler for your Chevy GMC 6. 6L Duramax. This transmission cooler utilizes a stacked plate design for maximum durability and powerful cooling. Aside from its durable construction, this transmission cooler is significantly

So you drive your Duramax a little hard sometimes, huh? Well one thing you shouldn’t overlook is how hot your Transmission becomes when you do. Luckily Mishimoto has designed a solution to that problem: a direct-fit transmission cooler for your Chevy/GMC 6.6L Duramax.

This 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 and boasts a 174% greater core volume. Not only that, it has a 192% greater fin surface area than the stock 2003–2005 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 Mishimoto’s Lifetime Warranty with Accident Protection for worry free cooling as long as you own it.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 91702114784

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Reviewed in the United States on February 25, 2026
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Theresa J Hammond
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★★★★★ 5
Very happy with them
Size: 10FT, Style: 1 Pack
They work awesome definitely recommend them
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Reviewed in the United States on May 18, 2026
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la
Draper, US
★★★★★ 5
Good fit and nice sharp holesaw included
The hole made by the included holesaw was the perfect size for the insert. They work well and cosmetically look much better than a raw hole in the wood. I tried the cable wrap and inserter and both make the job of wrapping and securing the cables much easier. Overall a good product and a good value.
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Reviewed in the United States on January 17, 2025
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Grant
Whiting, US
★★★★★ 5
Great for small projects. Nice fit.
I purchased this set while building a couple of end tables. They fit like a glove and it's really nice that they come with the hole saw bit. It's a great set for what you get.
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Reviewed in the United States on May 19, 2026
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Sia G
Carnegie, US
★★★★★ 5
My desk looks organized
Works great
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