Mishimoto Transmission Cooler Kit

2007–2011 Jeep Wrangler JK 3.8L V6

Part #: MMTC-WRA-07

Overview

The Mishimoto Transmission Cooler Kit is a precision-engineered cooling upgrade designed specifically for Jeep Wrangler JK models from 2007 to 2011 equipped with the 3.8L V6 engine and 42RLE transmission. This kit addresses the common issue of elevated transmission fluid temperatures experienced during heavy towing, off-road driving, or operation in hot climates. By effectively reducing transmission fluid heat, it helps prevent premature transmission wear, enhances reliability, and improves overall vehicle safety.

Ideal for Jeep enthusiasts who demand durability and consistent performance, this cooler kit installs directly in the front grille area to maximize airflow and cooling efficiency without requiring vehicle modifications.

Key Features

Engineered for superior cooling and straightforward installation, the Mishimoto Transmission Cooler Kit offers the following benefits:

• Direct-fit design tailored for 2007–2011 Jeep Wrangler JK chassis with 3.8L V6 and 42RLE transmission
• Large 19-row bar-and-plate cooler for enhanced heat dissipation
• Precision-engineered mounting brackets for secure, no-drill installation
• Significant reduction in transmission fluid temperatures to extend transmission life
• Includes all necessary transmission lines, fittings, and hardware for complete installation
• Compatible with Mishimoto Jeep JK oil cooler kit and all-aluminum radiator for comprehensive cooling upgrades
• Durable aluminum construction designed to withstand off-road and harsh environmental conditions
• Backed by Mishimoto’s lifetime warranty for long-term peace of mind

Construction & Design

The transmission cooler features a robust 19-row bar-and-plate design, which provides superior cooling efficiency compared to traditional tube-and-fin coolers. Crafted from high-quality aluminum, the cooler offers excellent heat transfer capabilities while maintaining a lightweight profile to avoid adding unnecessary weight to the vehicle.

Precision-engineered mounting brackets allow for a secure fit in the Jeep Wrangler JK’s front grille area, ensuring maximum airflow without any need for cutting or modifying the vehicle’s bodywork. All included transmission lines and fittings are designed for durability and leak-free performance, making this kit reliable for both daily driving and extreme off-road conditions.

Installation & Fitment

Installation is straightforward thanks to the direct-fit design and comprehensive hardware kit. The cooler mounts securely in the front grille area using the supplied brackets, optimizing airflow to the cooler for maximum efficiency. All necessary transmission lines and fittings are included, allowing for a clean, professional installation without additional parts or modifications.

This transmission cooler kit fits the following Jeep Wrangler JK models equipped with the 3.8L V6 and 42RLE transmission:

• Jeep Wrangler 3.8L 42RLE (2007–2011)
• Jeep Wrangler 70th Anniversary (2011)
• Jeep Wrangler Rubicon (2007–2011)
• Jeep Wrangler Sahara (2007–2011)
• Jeep Wrangler Sport (2010–2011)
• Jeep Wrangler Unlimited 70th Anniversary (2011)
• Jeep Wrangler Unlimited Rubicon (2007–2011)
• Jeep Wrangler Unlimited Sahara (2007–2011)
• Jeep Wrangler Unlimited Sport (2010–2011)
• Jeep Wrangler Unlimited X (2007–2010)
• Jeep Wrangler X (2007–2010)

What's Included

• 19-row bar-and-plate transmission cooler
• Precision mounting brackets
• All necessary transmission lines and fittings
• Installation hardware
• Detailed installation instructions

Ideal For

This transmission cooler kit is perfect for Jeep Wrangler JK owners who frequently tow heavy loads, engage in off-road driving, or operate their vehicles in hot climates where transmission fluid temperatures can rise to damaging levels. It is also an excellent upgrade for anyone looking to extend the life of their transmission and improve overall vehicle safety and reliability. When combined with Mishimoto’s Jeep JK oil cooler kit and all-aluminum radiator, it provides a comprehensive cooling solution for the most demanding driving conditions.

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.