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

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

$323.55 $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:
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  • 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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4.6 ★★★★★
Based on 1996 reviews
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Verified Purchase
Ryan
Phoenix, US
★★★★★ 1
Terrible sound quality and bass
Style: X5206 with Two Woofers
Sounds cheap, didn’t come with a charger, and the bass does not vibrate at all, so I bought got a jbl 110 the next day. The jbl is a thousand times better, the bass blew me away, and the sound is very high quality. Don’t waste your time and money on it get a jbl
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 19, 2026
I
Verified Purchase
Iman.
Grantham, US
★★★★★ 4
Turn me up turbo
Style: X3206 with One Woofer
I bought this for my performances assuming well of the brand (I’m a musician). My biggest complaint is that I wish it were louder. There have been performances where they’ve asked me to turn the volume up and surely enough it’s already at its loudest volume 🥴. The battery life is pretty good, it’s never died on me and I’ve had 4hr gigs before. The light is also a nice touch (and can turn on and off per your request of hitting a button). It makes a sound when you turn it on and off which can also be muted if you can catch it in time. Pretty easy for me to carry from place to place. Im not sure I’d recommend it to a musician but depending on what it is you need it for- it’s truly not bad. For the price it’s pretty average and until I can invest in a louder option, it gets the job done pretty okay.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 21, 2026
J
Verified Purchase
Jasmine C
Charlottesville, US
★★★★★ 5
Not bad
Style: X5206 with Two Woofers
A good speaker, wish it connect to my tv without an audio cord. But the sound is not bad. It’s good for the price.
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Reviewed in the United States on March 11, 2026
J
Verified Purchase
Jwick
West Palm Beach, US
★★★★★ 5
Good product
Works as should and shows correct voltage.. double checked with several multi meters. And has been running my 4000, watt amp for almost 6 months now with no problem
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Reviewed in the United States on August 18, 2025
C
Verified Purchase
chris
New York, US
★★★★★ 5
Its ok but falls out
Works good but not connected to the unit so it falls out
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 16, 2026

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