8HP Thermal Bypass Valve


Are you a RAM or JEEP enthusiast who values peak performance and reliability in your ride? Say hello to the Thermal Bypass Valve for 8HP70 and 8HP75 transmissions made by Jesse Caulk from Ram Forum!

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California residents: This product is not CARB-exempt and will not meet exemption requirements. We can not, and will not ship to residents of California. We appreciate your understanding.


2013-present RAM trucks with the 8-speed transmission (8HP70 or 8HP75).

2021-present JEEP Wagoneer and Grand Wagoneer with the 8-speed transmission (8HP70 or 8HP75).

Benefits of the Thermal Bypass Valve:

  1. Enhanced Performance: By maintaining optimal transmission temperatures, the Thermal Bypass Valve ensures that your vehicle’s transmission operates at peak performance, delivering power to the wheels efficiently and smoothly.
  2. Extended Lifespan: Heat is a transmission’s worst enemy. With the Thermal Bypass Valve in place, your transmission components are protected from the excessive wear and tear associated with overheating, extending the lifespan of your transmission.
  3. Improved Fuel Efficiency: Overheating transmissions can result in decreased fuel efficiency. The Thermal Bypass Valve helps you save on fuel costs by preventing unnecessary temperature-related losses.
  4. Reduced Maintenance Costs: Fewer overheating-related issues mean fewer visits to the mechanic. Installing the Thermal Bypass Valve can help you save on costly transmission repairs.
  5. Easy Installation: The Thermal Bypass Valve is designed to be user-friendly, making installation a breeze for both DIY enthusiasts and professional mechanics.
  6. Compatibility: Our Thermal Bypass Valve is engineered specifically for the 8HP70 and 8HP75 transmissions, ensuring a seamless fit and reliable performance.
  7. Peace of Mind: You can hit the road with confidence, knowing that your transmission is protected from the perils of overheating, no matter where your adventures take you.

Real-world temperature results of the Thermal Bypass Valve:

104°F / 40°C (ambient) Texas summer at operating temp (unloaded): 150°F / 65.5°C

0°F / -18°C (ambient) Pennsylvania winter at operating temp (unloaded): 100°F / 38°C

Installation Instructions are available here.

Additional information

Weight 1.5 oz
Dimensions 10 × 6 × 0.1 in


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