Mishimoto Transmission Cooler Tube-Fin

1994–2002 Dodge Ram 2500 / 3500 5.9L Diesel

Part #: MMTC-RAM-94SL

Overview

The Mishimoto Transmission Cooler Tube-Fin is a high-performance cooling upgrade designed specifically for Dodge Ram 2500 and 3500 trucks equipped with the 5.9L Cummins diesel engine from 1994 to 2002. This direct-fit transmission cooler efficiently dissipates heat from the transmission fluid, helping to prevent overheating during heavy towing, hauling, or demanding driving conditions. By maintaining optimal transmission fluid temperatures, it extends the life of your transmission and improves overall vehicle reliability.

Whether you are a towing enthusiast, fleet operator, or performance driver, the Mishimoto transmission cooler offers a durable and effective solution that outperforms the factory unit. It ensures your transmission stays cool under pressure, reducing the risk of costly failures and downtime.

Key Features

Engineered to provide superior cooling performance and durability, the Mishimoto transmission cooler incorporates advanced design elements and premium materials:

• 116% increase in core volume compared to the factory cooler for enhanced heat dissipation
• 141% greater fluid capacity to improve cooling efficiency and extend transmission fluid life
• 134% larger fin surface area to maximize heat transfer and airflow
• Direct-fit design tailored specifically for 1994–2002 Dodge Ram 2500 and 3500 5.9L Cummins models
• Includes two CNC-machined stainless steel hose barb fittings for easy, reliable installation
• High-quality transmission fluid hose supplied for secure, leak-free connections
• Eliminates common issues with factory quick-disconnect fittings that often seize over time
• 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 premium aluminum, known for its excellent thermal conductivity and corrosion resistance. The increased core volume and expanded fin surface area are engineered to maximize heat exchange, ensuring your transmission fluid remains cooler even under heavy loads or extreme conditions.

Durability is a key focus, with the cooler built to withstand harsh environments, frequent towing, and demanding worksite conditions. Precision CNC-machined stainless steel hose barb fittings replace the factory’s quick-disconnects, providing a straightforward installation process and reliable, leak-free connections that resist seizing and corrosion.

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 requires no permanent modifications and can be completed quickly using basic hand tools. The included stainless steel hose barb fittings and transmission fluid hose allow you to bypass the problematic factory quick-disconnect fittings, ensuring a hassle-free upgrade.

Clear instructions are provided, making this cooler an accessible upgrade for both professional mechanics and DIY enthusiasts seeking to maintain optimal transmission temperatures and improve cooling performance.

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 detailed instructions

Ideal For

This transmission cooler is ideal 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 regularly hauling trailers or heavy equipment
• Fleet operators requiring durable, long-lasting cooling solutions
• Performance drivers pushing their trucks on the drag strip or off-road
• Daily drivers looking 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.