Improve the cooling efficiency and long-term reliability of your ZF 8-speed automatic transmission with the PPE Transmission Fluid Thermal Bypass Valve. Designed to replace the restrictive stock thermal valve, this upgraded unit helps increase fluid flow to your transmission cooler, lowering fluid temperatures and helping extend transmission life under towing, spirited driving, or heavy loads.

Key Features

• Increases Cooler Flow: Removes restrictive OEM passages to deliver more transmission fluid to the cooler for better heat management.
• Billet Aluminum Construction: Durable, high-strength body built to withstand heat and repeated use.
• Magnetic Service Plug: Includes a removable neodymium magnet that captures ferrous debris before it recirculates through the system.
• Direct Replacement: Simple bolt-in design installs easily with basic tools. No modifications required.
• Maintenance-Friendly: Service plug makes inspection and debris removal quick and easy.

Why Upgrade?

The stock thermal bypass valve in ZF 8-speed transmissions can restrict flow to the cooler or fail in high-stress conditions, leading to elevated transmission temperatures and accelerated wear. Upgrading to this PPE bypass valve improves cooler flow and heat mitigation — helping preserve internal transmission components and maintain consistent performance.

Fitment

Designed for vehicles equipped with the ZF 8-speed automatic transmission from 2016 through 2025, including:

• Dodge Durango (8HP70 / 8HP75 / 8HP90 models)
• Jeep Grand Cherokee (8HP70 / 8HP75 / 8HP90 models)

What’s Included

• PPE Transmission Fluid Thermal Bypass Valve
• Magnetic Service Plug with O-Ring
• Installation Hardware
• Instructions

Upgrade your transmission cooling system with this simple yet effective bypass valve — designed to help keep temperatures down, extend the life of your ZF 8-speed transmission, and protect your investment under heavy use.