Mishimoto Transmission Cooler

Ram 2500 / 3500 19-26 6.7L Diesel/6.4L

Part #: MMTC-RAM-19

Overview

The Mishimoto Transmission Cooler is a precision-engineered upgrade designed specifically for 2019 to 2024 Ram 2500 and 3500 trucks equipped with the 6.7L Cummins diesel engine. Transmission heat is a leading cause of premature wear and failure, especially under heavy towing, hauling, or demanding driving conditions. This direct-fit cooler combats excessive heat by significantly improving transmission fluid cooling, helping maintain optimal operating temperatures and enhancing transmission longevity.

Whether you rely on your Ram for commercial fleet duties, off-road adventures, or heavy-duty towing, the Mishimoto Transmission Cooler delivers reliable thermal management. Upgrading from the factory cooler reduces fluid temperatures, improves shifting performance, and protects your transmission from heat-related damage, ensuring your truck performs at its best in high-stress environments.

Key Features

Built with advanced cooling technology, the Mishimoto Transmission Cooler offers superior heat dissipation and fluid flow efficiency. Key features include:

• Tube-and-fin core design with internal fins to maximize cooling surface area and fluid contact
• 64% thicker core compared to stock for enhanced heat rejection capacity
• Three additional rows of cooling fins to improve thermal transfer
• Reduced flow restriction for better fluid circulation and transmission performance
• Direct-fit design with bolt-on mounting tabs for easy installation without modifications
• Compatible with stock radiator and A/C condenser mounting points
• Durable aluminum construction with excellent corrosion resistance
• Backed by Mishimoto’s Lifetime Warranty with Accident Protection

Construction & Design

The Mishimoto Transmission Cooler features a robust tube-and-fin core crafted from high-quality aluminum, known for its excellent thermal conductivity and resistance to corrosion. Internal fins within the tubes increase the fluid’s exposure to cooling surfaces, optimizing heat transfer efficiency. The core is 64% thicker than the OEM cooler and includes three extra rows of cooling fins, providing a substantial improvement in heat rejection capacity.

Precision engineering ensures a perfect fit for the Ram 2500 and 3500 models listed, maintaining factory mounting points and preserving the integrity of your vehicle’s front-end components. This design guarantees durability and long-lasting performance even under the most demanding conditions.

Installation & Fitment

Installation is straightforward and requires no cutting, trimming, or modifications. The cooler mounts directly using existing bolt-on tabs, allowing your radiator and A/C condenser to remain securely in place. This reduces installation time and cost, making it accessible for both professional installers and experienced DIY enthusiasts.

This transmission cooler is compatible with the following Ram models and trims:

• Ram 2500 Big Horn (2019–2024)
• Ram 2500 Laramie (2019–2024)
• Ram 2500 Laramie Longhorn (2019–2021)
• Ram 2500 Limited (2019–2024)
• Ram 2500 Limited Longhorn (2021–2024)
• Ram 2500 Lone Star (2019–2024)
• Ram 2500 Power Wagon (2019–2024)
• Ram 2500 Rebel (2023–2024)
• Ram 2500 Special Service (2024)
• Ram 2500 Tradesman (2019–2024)
• Ram 3500 Big Horn (2019–2024)
• Ram 3500 Laramie (2019–2024)
• Ram 3500 Laramie Longhorn (2019–2020)
• Ram 3500 Limited (2019–2024)
• Ram 3500 Limited Longhorn (2021–2024)
• Ram 3500 Lone Star (2019–2022)
• Ram 3500 SLT (2019–2024)
• Ram 3500 Special Service (2024)
• Ram 3500 Tradesman (2019–2024)

What's Included

• Mishimoto direct-fit transmission cooler core
• Mounting brackets and hardware
• Installation instructions

Ideal For

This transmission cooler is ideal for Ram 2500 and 3500 owners who demand reliable transmission performance under heavy towing, hauling, or high-performance driving conditions. It is perfect for fleet operators, off-road enthusiasts, and daily drivers who want to protect their investment by maintaining optimal transmission temperatures and extending component life.

Mishimoto is a performance cooling brand offering aluminum radiators, intercoolers, oil coolers, hoses, and supporting hardware built to manage heat on hard-driven street and track vehicles. For boosted setups and towing/off-road rigs alike, Mishimoto upgrades are designed to increase cooling capacity and reliability where factory systems can become a limitation.