Transmission Cooler, fits Chevrolet/GMC 6.6L Duramax (LB7) 2001-2003

Name: Transmission Cooler, fits Chevrolet/GMC 6.6L Duramax (LB7) 2001-2003
SKU: MMTC-DMAX-01SL
Price: 498.95 USD
Availability: InStock

$498.95

Regular Price $549.00

Free shipping on this product and on orders over $100.

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Installation Difficulty: Easy

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Key Features

Direct-fit for all 2001-2003 Chevrolet/GMC with Allison transmission
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
174-percent greater core volume than stock cooler
192-percent greater external fin surface area over stock cooler
Patent number D900,161
Includes durable SAE J1532 hose designed specifically for use with transmission fluid
Mishimoto Lifetime Warranty

See all features

Key Features

Direct-fit for all 2001-2003 Chevrolet/GMC with Allison transmission
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
174-percent greater core volume than stock cooler
192-percent greater external fin surface area over stock cooler
Patent number D900,161
Includes durable SAE J1532 hose designed specifically for use with transmission fluid
Mishimoto Lifetime Warranty

There's no greater enemy for a transmission than heat. Whether your 2001-2003 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 2001-2003 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 174% greater core volume, and 192% greater fin surface area than the stock 2001-2003 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.

More Information
Rows	13
Core Length (in)	27.95
Core Height (in)	5.78
Core Thickness (in)	1.25
Engine Codes	6.6L Duramax
Chassis Codes	LB7
Note	This kit fits with early 2003 trucks with orange clips. Late 2003 trucks with purple clips should use MMTC-DMAX-03

Installation Guides

Installation Guides

(Size: 7.9 MB)

Installation Guides

(Size: 7.9 MB)

Mishimoto Stacked Plate Transmission Cooler
CNC-Machined Quick-Disconnect to Hose Barb Adapters
Stock-style Quick-Disconnect Fittings
Transmission Hoses
Mounting Brackets
Worm Gear Clamps
Zip Tie
Mounting Hardware
Mishimoto Lifetime Warranty

Cooling to the Duramax - Transmission Cooler, Part 3: Adapt and Overcome

July 03, 2018

This 2001-2014 Chevy / GMC 6.6L Duramax Transmission Cooler is now available! Click here to check it out!

With so many model years to cover, our biggest challenge would be making one cooler fit them all. But we had a plan.

Our 2001-2014 Chevy / GMC Duramax transmission cooler blog so far has focused on the two stock coolers. We looked at the early, comically small, transmission cooler. We looked at the later, and larger but poorly placed, transmission cooler. Finally, after almost a year of R&D, we get to look at Mishimoto's solution to the stock coolers' shortcomings. But first, we need to take a closer look at one more of the stock components.

040417_NLT_DMax_Stock_1

At the end of our last post, we mentioned wanting to use one large cooler to fit all 14 model years

Cooling to the Duramax - Transmission Cooler, Part 3: Adapt and Overcome

Cooling to the Duramax - Transmission Cooler, Part 2: Measure Twice

January 09, 2018

This 2001-2014 Chevy / GMC 6.6L Duramax Transmission Cooler is now available! Click here to check it out!

No matter how many trucks I write about, I'm always surprised how often a critical part of the drivetrain is underdeveloped. It's even more surprising when a truck built for towing and hauling has a major flaw in the transmission system. The transmission is the heart of towing, and when you're asking it to carry over five tons of truck and trailer up a grade, any weakness in the system is sure to show itself. However, the Allison transmission mated to 2001-2014 Duramax engines is not that weak point.

Cooling to the Duramax - Transmission Cooler, Part 2: Measure Twice

Transmission Cooling to the duraMAX - 2001-2010 Chevy /GMC Duramax Transmission Cooler, Part 1 - Stock Review

May 23, 2017

This 2001-2014 Chevy / GMC 6.6L Duramax Transmission Cooler is now available! Click here to check it out!

Extreme heat is always the enemy, especially when it comes to vehicles equipped with an automatic transmission. The Allison gearbox mated with your 6.6L Duramax is no exception. With the high temperatures produced by an automatic transmission, it seems almost cruel that the sweltering summer heat comes when most of the towing of campers, boats, and other outdoor toys happens. GM did include some help to keep your gears cool. Unfortunately, it's a little small.

For such an iconic towing machine, it seems strange to equip it with

Transmission Cooling to the duraMAX - 2001-2010 Chevy /GMC Duramax Transmission Cooler, Part 1 - Stock Review

Mishimoto Automotive (“Mishimoto”) warrants its products under this lifetime limited warranty policy (“Warranty Policy”). This Warranty Policy applies solely to: (i) Mishimoto Products purchased directly from Mishimoto or Mishimoto authorized dealers (each a “Mishimoto Product” and collectively, the “Mishimoto Products”) and (ii) the original purchaser of such Mishimoto Product (“Purchaser”). This Warranty Policy is non-transferable and all claims under this Warranty Policy must be accompanied by the original sales receipt. The terms and conditions of this Warranty Policy are subject to change by Mishimoto at any time without notice.

For our complete warranty policy, please click here.