Mishimoto Transmission Cooler

Ram 2500 / 3500 15-18 6.7L Diesel/6.4L/5.7L

MMTC-RAM-15SL

Overview:

The Mishimoto Transmission Cooler for the 2015–2018 RAM 6.7L Cummins is engineered to protect your transmission from the damaging effects of excessive heat. Whether you use your RAM as a heavy-duty tow vehicle, a hardworking fleet truck, or a daily driver with spirited performance demands, maintaining optimal transmission temperatures is critical for reliability and longevity. This direct-fit transmission cooler is designed to replace the factory unit with a vastly improved cooling solution that enhances fluid capacity and heat dissipation.

By significantly increasing core volume and fin surface area, the Mishimoto cooler ensures your transmission fluid stays cooler under all operating conditions, reducing wear and preventing overheating. This upgrade is ideal for drivers who demand more from their RAM’s transmission, especially in towing or high-load scenarios.

Key Features:

The Mishimoto Transmission Cooler incorporates advanced design features to maximize cooling efficiency and durability:

• 112% greater core volume compared to the stock cooler for enhanced fluid capacity
• 237% increase in fin area to improve heat dissipation
• 226% increase in fluid capacity for better thermal management
• Tube-and-fin core design with internal fins to balance fluid flow and cooling efficiency
• Internal tube fins increase cooling surface area and ensure more fluid contacts the tube walls
• Direct-fit design requires no cutting or modifications for installation
• Includes all necessary hardware for a straightforward, fast install
• Backed by Mishimoto’s Lifetime Warranty with Accident Protection for peace of mind

Construction & Design:

The Mishimoto transmission cooler features a robust tube-and-fin core constructed from high-quality aluminum, known for its excellent thermal conductivity and corrosion resistance. The internal fins within the tubes are engineered to maximize fluid contact with the cooling surfaces, enhancing heat transfer efficiency. This design not only improves cooling performance but also maintains optimal fluid flow to prevent pressure drops or flow restrictions.

Every component is precision-engineered to meet or exceed OEM standards, ensuring durability and reliable operation in demanding conditions. The cooler’s finish is designed to resist environmental damage, extending the life of the unit even in harsh off-road or towing environments.

Installation & Fitment:

Installation of the Mishimoto Transmission Cooler is designed to be quick and hassle-free. The direct-fit design means it bolts directly into place without the need for cutting, drilling, or other modifications. All necessary mounting hardware and fittings are included, allowing you to upgrade your transmission cooling system with minimal downtime.

This cooler is specifically engineered to fit the 2015–2018 RAM 6.7L Cummins models, ensuring perfect compatibility and optimal performance without any guesswork.

What's Included:

• Mishimoto transmission cooler core
• Mounting brackets and hardware
• Installation fittings and hoses (as required)
• Detailed installation instructions

Ideal For:

This transmission cooler is perfect for RAM 6.7L Cummins owners who:

• Tow heavy trailers or haul large loads regularly
• Use their truck for commercial or fleet applications requiring extended transmission durability
• Engage in performance driving or off-road activities that generate additional heat
• Want a reliable, long-lasting upgrade to their factory transmission cooling system

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.