Mishimoto Transmission Cooler

1994–2002 Dodge Ram 2500 / Ram 3500 5.9L Cummins

MMTC-RAM-94SL

Overview:

The Mishimoto Transmission Cooler is engineered to protect your transmission from the damaging effects of excessive heat. Designed specifically for 1994–2002 Dodge Ram 2500 and Ram 3500 trucks equipped with the 5.9L Cummins engine, this direct-fit cooler ensures optimal transmission temperatures whether you’re towing heavy loads, working hard on the job site, or pushing your truck on the street or strip. By maintaining cooler transmission fluid, Mishimoto’s cooler helps extend transmission life and improve overall vehicle reliability.

With a focus on durability and efficiency, this transmission cooler is an essential upgrade for any Dodge Ram owner looking to enhance their truck’s cooling system and prevent costly transmission failures caused by overheating.

Key Features:

Built to outperform the factory transmission cooler, the Mishimoto unit offers significant improvements in cooling capacity and durability:

• 116% increase in core volume compared to stock, allowing for greater heat dissipation
• 141% increase in fluid capacity to improve cooling efficiency and fluid longevity
• 134% greater fin surface area for enhanced heat transfer and airflow
• Direct-fit design tailored for 1994–2002 Dodge Ram 2500 and 3500 5.9L Cummins models
• Includes two CNC-machined stainless steel hose barb fittings for easy installation without dealing with seized quick-disconnect fittings
• Supplied with high-quality transmission fluid hose for a secure and leak-free connection
• Backed by Mishimoto’s Lifetime Warranty with Accident Protection for long-term peace of mind

Construction & Design:

The Mishimoto transmission cooler features a robust tube-and-fin core constructed from high-grade aluminum, providing excellent thermal conductivity and corrosion resistance. The increased core volume and fin surface area are engineered to maximize heat exchange, ensuring your transmission fluid stays cooler under demanding conditions. The cooler’s durable construction withstands harsh environments and heavy-duty use, making it ideal for towing, hauling, and performance driving.

Precision CNC-machined stainless steel fittings replace the often problematic factory quick-disconnects, allowing for a straightforward installation process and reliable, leak-free connections. This thoughtful design eliminates common issues associated with stock fittings, saving time and frustration during installation.

Installation & Fitment:

This transmission cooler is a direct-fit replacement for the factory unit on all 1994–2002 Dodge Ram 2500 and Ram 3500 trucks equipped with the 5.9L Cummins engine. Installation is straightforward and requires no permanent modifications to your vehicle. The included stainless steel hose barb fittings and transmission fluid hose enable you to bypass the factory quick-disconnect fittings, which are known to seize over time, ensuring a hassle-free upgrade.

Whether you are a professional mechanic or a DIY enthusiast, the Mishimoto transmission cooler installs quickly with basic hand tools and clear instructions, making it an accessible upgrade for maintaining optimal transmission temperatures.

What's Included:

• Mishimoto transmission cooler with tube-and-fin core
• Two CNC-machined stainless steel hose barb fittings
• High-quality transmission fluid hose
• Installation hardware and instructions

Ideal For:

This transmission cooler is perfect for Dodge Ram 2500 and 3500 owners who demand reliable transmission performance under heavy loads or extreme conditions. It is especially beneficial for:

• Towing enthusiasts who regularly haul trailers or heavy equipment
• Fleet operators requiring durable, long-lasting cooling solutions
• Performance drivers who push their trucks on the drag strip or off-road
• Daily drivers seeking to extend transmission life and prevent overheating

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.