Mishimoto Thermal Bypass Valve Kit

2016–2021 Jeep Grand Cherokee / 2021 Jeep Grand Cherokee L

MMTC-WK2-TBVFF

Overview:

The Mishimoto Thermal Bypass Valve Kit is a critical upgrade designed specifically for the 2016 to 2021 Jeep Grand Cherokee and the 2021 Jeep Grand Cherokee L models. This kit replaces the stock in-line thermal bypass valve found in the 8HP transmission cooling system, which is prone to failure and can lead to transmission overheating. By allowing full-flow transmission fluid to circulate through the cooler immediately upon startup, this valve kit ensures optimal transmission temperature management, protecting your vehicle’s transmission from heat-related damage.

Ideal for Jeep owners who demand reliability and enhanced cooling performance, especially those driving in hot climates, towing heavy loads, or engaging in extreme driving conditions, this upgrade eliminates the risk of transmission fluid bypass failure and extends the life of your transmission.

Key Features:

The Mishimoto Thermal Bypass Valve Kit offers a robust solution to common transmission cooling issues with these key features:

• Full-flow design allows transmission fluid to circulate through the cooler immediately at startup
• Replaces the failure-prone stock thermal bypass valve for improved reliability
• Durable CNC-machined billet aluminum housing for long-lasting performance
• Eliminates overheating risks by ensuring consistent fluid cooling
• Ideal for vehicles operating in hot climates or under heavy towing and extreme driving conditions
• Direct-fit replacement for easy installation without modifications
• Backed by Mishimoto’s signature Lifetime Warranty for peace of mind

Construction & Design:

Crafted from high-quality billet aluminum using precision CNC machining, the Mishimoto Thermal Bypass Valve Kit offers superior durability and corrosion resistance compared to the stock plastic valve. The all-aluminum housing withstands the rigors of high-temperature transmission fluid and harsh operating environments, ensuring consistent performance over time. The full-flow design removes the thermostat element found in the factory valve, eliminating the common failure point and allowing uninterrupted fluid flow to the transmission cooler.

Installation & Fitment:

Installation of the Mishimoto Thermal Bypass Valve Kit is straightforward and can typically be completed in under one hour using basic hand tools. The kit is a direct replacement for the factory valve and requires no modifications to the transmission cooling system. This ensures a hassle-free upgrade that restores and improves your transmission’s cooling efficiency.

Fitment includes the following Jeep models:

• Jeep Grand Cherokee 75th Anniversary (2016)
• Jeep Grand Cherokee 80th Anniversary (2021)
• Jeep Grand Cherokee Altitude (2018–2020)
• Jeep Grand Cherokee High Altitude (2018–2021)
• Jeep Grand Cherokee Laredo (2016–2020)
• Jeep Grand Cherokee Laredo E (2021)
• Jeep Grand Cherokee Laredo X (2021)
• Jeep Grand Cherokee Limited (2016–2021)
• Jeep Grand Cherokee Limited X (2019–2020)
• Jeep Grand Cherokee Overland (2016–2021)
• Jeep Grand Cherokee SRT (2016–2021)
• Jeep Grand Cherokee Summit (2016–2021)
• Jeep Grand Cherokee Trackhawk (2018–2021)
• Jeep Grand Cherokee Trailhawk (2017–2021)
• Jeep Grand Cherokee Upland (2019–2020)
• Jeep Grand Cherokee L Altitude (2021)
• Jeep Grand Cherokee L Laredo (2021)
• Jeep Grand Cherokee L Limited (2021)
• Jeep Grand Cherokee L Overland (2021)
• Jeep Grand Cherokee L Summit (2021)

What's Included:

• One CNC-machined billet aluminum full-flow thermal bypass valve housing
• All necessary seals and O-rings for installation
• Installation instructions

Ideal For:

This thermal bypass valve kit is perfect for Jeep Grand Cherokee and Grand Cherokee L owners who want to enhance transmission cooling reliability and longevity. It is especially beneficial for drivers who frequently tow heavy loads, operate in high-temperature environments, or engage in demanding off-road or performance driving. By upgrading to Mishimoto’s full-flow valve, you reduce the risk of transmission overheating and costly repairs.

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.