Mishimoto Transmission Cooler

2013–2014 Ram 2500 / 3500 6.7L Diesel

Part #: MMTC-RAM-13SL

Overview

The Mishimoto Transmission Cooler for the 2013–2014 Ram 2500 and 3500 equipped with the 6.7L Cummins diesel engine is a direct-fit upgrade designed to safeguard your transmission from excessive heat buildup. Whether you tow heavy trailers, operate a fleet vehicle, or push your truck in demanding driving conditions, maintaining optimal transmission temperatures is essential for durability and reliable performance. This cooler replaces the factory unit with a significantly enhanced design that improves cooling efficiency and fluid capacity, ensuring your transmission runs cooler and lasts longer under heavy loads and high-stress scenarios.

Engineered specifically for the 2013–2014 Ram 6.7L Cummins, this transmission cooler installs easily without any cutting or modifications. Backed by Mishimoto’s Lifetime Warranty with Accident Protection, it offers dependable cooling performance and peace of mind for the life of your truck.

Key Features

Designed with advanced engineering principles, the Mishimoto transmission cooler delivers superior heat dissipation and durability. Key features include:

• 82% greater core volume compared to the stock cooler for enhanced heat absorption
• 112% increase in fin surface area to maximize airflow and cooling efficiency
• 1.34-quart fluid capacity to improve heat transfer and reduce transmission temperatures
• Tube-and-fin core design with internal fins that increase fluid contact with cooling surfaces
• Direct-fit replacement for 2013–2014 Ram 6.7L Cummins models requiring no cutting or modifications
• Durable construction engineered to withstand harsh environments and heavy-duty use
• Backed by Mishimoto’s Lifetime Warranty with Accident Protection for long-term reliability

Construction & Design

The Mishimoto transmission cooler features a robust tube-and-fin core with internal fins inside each tube. This design increases the total cooling surface area and ensures more transmission fluid contacts the cooling surfaces, optimizing heat transfer. The balance between fluid flow and cooling efficiency prevents overheating during heavy towing or high-performance driving.

Constructed from high-quality materials, the cooler resists corrosion and damage from road debris, ensuring long-lasting durability and consistent performance in demanding conditions. Its rugged build is tailored to meet the needs of heavy-duty diesel trucks.

Installation & Fitment

Installation is straightforward and designed as a direct replacement for the factory transmission cooler on 2013–2014 Ram 2500 and 3500 trucks with the 6.7L Cummins engine. No cutting, drilling, or modifications are necessary. The cooler fits perfectly within existing mounting points and connects seamlessly with stock transmission lines, making it an ideal upgrade for both professional installers and DIY enthusiasts. This ensures minimal installation time and effort while delivering maximum cooling benefits.

What's Included

• Mishimoto direct-fit transmission cooler core
• All necessary mounting hardware
• Installation instructions

Ideal For

This transmission cooler is perfect for Ram 6.7L Cummins owners who require reliable transmission cooling under heavy loads or high-stress conditions. It is especially beneficial for:

• Towing enthusiasts regularly hauling heavy trailers or equipment
• Fleet operators aiming to extend transmission life and reduce maintenance costs
• Performance drivers pushing their trucks on the dragstrip or off-road
• Daily drivers seeking enhanced transmission protection and peace of mind

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.