---
product_id: 80274385
title: "MMTC-DMAX-06SL Transmission Cooler, Compatible with Chevrolet & GMC Duramax 6.6 LBZ & LMM, 2006-2010, Silver"
brand: "mishimoto"
price: "$962.75"
currency: USD
in_stock: true
reviews_count: 8
category: "Mishimoto"
url: https://www.desertcart.us/products/80274385-mmtc-dmax-06sl-transmission-cooler-compatible-with-chevrolet-and-gmc
store_origin: US
region: United States of America
---

# Direct-fit brackets & hoses for easy install CNC-machined adapters for leak-proof fit 125% fin surface area for max cooling MMTC-DMAX-06SL Transmission Cooler, Compatible with Chevrolet & GMC Duramax 6.6 LBZ & LMM, 2006-2010, Silver

**Brand:** mishimoto
**Price:** $962.75
**Availability:** ✅ In Stock

## Summary

> ❄️ Keep your Duramax running cooler, longer — because overheating is so last season!

## Quick Answers

- **What is this?** MMTC-DMAX-06SL Transmission Cooler, Compatible with Chevrolet & GMC Duramax 6.6 LBZ & LMM, 2006-2010, Silver by mishimoto
- **How much does it cost?** $962.75 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/80274385-mmtc-dmax-06sl-transmission-cooler-compatible-with-chevrolet-and-gmc)

## Best For

- mishimoto enthusiasts

## Why This Product

- Trusted mishimoto brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Endure:** Corrosion-resistant aluminum withstands extreme conditions and vibration
- • **Unmatched Cooling Power:** Boosts core volume by 84% to slash transmission temps under heavy load
- • **Plug & Play Installation:** Tailor-made hoses and mounting hardware cut downtime to minutes
- • **Precision Engineered Fit:** OEM-style direct replacement ensures zero guesswork and perfect alignment
- • **Trusted Performance Upgrade:** Backed by Mishimoto’s rigorous quality standards for peace of mind

## Overview

The Mishimoto MMTC-DMAX-06SL Transmission Cooler is a premium, direct-fit upgrade for 2006-2010 Chevrolet & GMC Duramax 6.6 LBZ & LMM trucks. Featuring 84% more core volume and 125% increased fin surface area than stock, it dramatically improves transmission cooling efficiency. CNC-machined adapters and custom brackets ensure leak-resistant, OEM-precise installation, while durable aluminum construction resists corrosion and vibration. Ideal for heavy towing and high-load driving, this cooler delivers reliable thermal management backed by Mishimoto’s industry-leading quality.

## Description

The Mishimoto transmission cooler MMTC DMAX 06SL is compatible with Chevrolet and GMC Duramax 6.6 LBZ or LMM, 2006–2010 engines. Designed for direct OEM-style replacement, this cooler maximizes heat dissipation with 84% more core volume and 125% more fin surface area than the stock unit, helping reduce transmission temperatures under towing, hauling, or high-load driving situations.Performance-conscious owners praise the improved cooling efficiency and smoother transmission operation across extended drives or heavy towing routes. The integrated CNC-machined adapter fittings connect directly to factory transmission lines for leak-resistant performance. Direct-fit brackets and custom hoses provide a precise installation path without modification or guesswork.Engineered with reliability in mind, the cooler resists corrosion and vibration, ensuring long-term service even in extreme environments. Customers frequently ask about fitment accuracy and hose routing, this design aligns with OEM profiles to eliminate common alignment issues when installed per instructions.Automotive trends show a growing focus on transmission oil cooling as towing capacity and powertrain demands increase. This cooler addresses that trend head-on, offering enhanced thermal management in aftermarket upgrade packages.Built from premium aluminum and assembled under rigorous quality standards, this Mishimoto cooler gives you the assurance of dependable drivetrain protection backed by a brand that stands solidly behind its engineering and manufacturing excellence.

Review: Well worth the Money - 2010 GMC Sierra 2500 6.6 with 6 speed Allison Definitely on of the biggest trans coolers on the market. Install was so simple it used existing holes and fit perfectly and is solid in its home. Will update when is run it for a while and see how it cools. I did do a trans fluid service with TranSynd and a PPE external filter. All in all took 2.5 gallons of fluid for service with larger cooler and filter.
Review: Easy install and dropped temp 30-40 degrees - Install took about 20min, took a hr round trip and seen a big difference in temperature. Highly recommend.

## Features

- Compatibility: Designed to fit Chevrolet & GMC Duramax 6.6 LBZ & LMM, 2006 2010 transmission systems for direct OEM style fit
- Enhanced Transmission Cooling: Increases core volume by 84 % and fin surface area by 125 % compared to stock for faster cooling and improved transmission response
- Durable Construction: Features CNC-machined adapters and direct-fit brackets to ensure leak-resistant, corrosion-resistant connections under high load.
- Effortless Installation: Tailor made hoses and included mounting hardware simplify installation and minimize downtime
- Peace of Mind: Constructed with high-performance materials and backed by Mishimoto's high standards for durability and quality

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07GZJZMN4 |
| Best Sellers Rank | #666,443 in Automotive ( See Top 100 in Automotive ) #2,437 in Automotive Replacement Engine Radiators |
| Brand | Mishimoto |
| Customer Reviews | 4.5 4.5 out of 5 stars (73) |
| Date First Available | August 31, 2018 |
| Exterior | Machined |
| Is Discontinued By Manufacturer | No |
| Item Weight | 7.98 pounds |
| Item model number | MMTC-DMAX-06SL |
| Manufacturer | Mishimoto |
| Manufacturer Part Number | MMTC-DMAX-06SL |
| Model | MMTC-DMAX-06SL |
| Product Dimensions | 29 x 4 x 14 inches |

## Images

![MMTC-DMAX-06SL Transmission Cooler, Compatible with Chevrolet & GMC Duramax 6.6 LBZ & LMM, 2006-2010, Silver - Image 1](https://m.media-amazon.com/images/I/61LVQ+wbJaL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Well worth the Money
*by B***S on June 9, 2021*

2010 GMC Sierra 2500 6.6 with 6 speed Allison Definitely on of the biggest trans coolers on the market. Install was so simple it used existing holes and fit perfectly and is solid in its home. Will update when is run it for a while and see how it cools. I did do a trans fluid service with TranSynd and a PPE external filter. All in all took 2.5 gallons of fluid for service with larger cooler and filter.

### ⭐⭐⭐⭐⭐ Easy install and dropped temp 30-40 degrees
*by R***Z on August 4, 2024*

Install took about 20min, took a hr round trip and seen a big difference in temperature. Highly recommend.

### ⭐⭐⭐⭐⭐ Works very very well
*by B***R on May 24, 2024*

When hauling my 5th wheel trailer over the mountains with my 2007 Silverado Diesel, I would sometimes have overheated transmission oil, up around 300 degrees F. Normal driving temps with flat terrain would give me temps around 147 deg F. Since installing the cooler immediate resulted in cooler temps. Driving around town temps were 100-125 deg. F. The higest temp recorded over mountain passes between Seattle and Bryce Canyon in May was 147 degrees. This cooler is totally worth it. Good quality, easy fit and installment. Now the only gauge I monitor is the EGR, not worries any more about transmission temps.

## Frequently Bought Together

- Mishimoto MMTC-DMAX-06SL Transmission Cooler Compatible With Chevrolet/GMC Duramax 6.6 LBZ/LMM 2006-2010 Silver
- Allison 29539579 Screw-on Filter with Magnet Filter Kit replacing filter for Allison transmission per OEM Specs

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-02-26*