The transmission in your Ram 6.7L Cummins is responsible for transferring substantial torque, which creates heat that must be controlled for reliable performance. The factory cooling system used with the 68-RFE and Aisin AS69RC transmissions includes an in-line thermal bypass valve that restricts fluid flow to the transmission cooler until operating temperature is reached. When the stock thermostat fails, transmission fluid may not reach the cooler, increasing the risk of excessive heat and transmission damage.
Mishimoto designed the MMTC-RAM2-TBV Thermal Bypass Valve Kit as a durable, high-flow upgrade for 2019-2024 Ram trucks equipped with the 6.7L Cummins diesel engine. Its CNC-machined aluminum valve body features a black anodized finish, integrated cooling fins, and improved fluid flow compared with the factory bypass valve. The replaceable thermostat opens approximately 10°F earlier than the stock thermostat, helping transmission fluid reach the cooler sooner while still supporting proper warm-up in colder conditions.
For operation in hot climates, the kit includes a thermostat bypass that enables continuous fluid flow to the transmission cooler regardless of temperature. The bypass can be changed with basic hand tools, making it easy to configure the cooling system for seasonal driving conditions. The fully serviceable design supports long-term maintenance and dependable performance under demanding towing, hauling, and daily-driving conditions. This Mishimoto thermal bypass valve kit is backed by the Mishimoto Lifetime Guarantee and is engineered specifically for compatible 2019-2024 Ram 6.7L Cummins applications.
Features:
- Includes a thermostat bypass for continuous transmission cooler flow in hot climates
- Fully serviceable thermostat supports quick warm-up in cold weather
- Opens approximately 10°F earlier than the factory thermostat
- Provides increased fluid flow compared with the stock thermal bypass valve
- CNC-machined aluminum valve body with integrated cooling fins
- Durable black anodized finish
- Compatible with 68-RFE and Aisin AS69RC transmission cooling systems
- Backed by the Mishimoto Lifetime Guarantee
Fitment:
2019 Ram 2500 Big Horn
2019 Ram 2500 Laramie
2019 Ram 2500 Laramie Longhorn
2019 Ram 2500 Limited
2019 Ram 2500 Lone Star
2019 Ram 2500 Tradesman
2019 Ram 3500 Big Horn
2019 Ram 3500 Laramie
2019 Ram 3500 Laramie Longhorn
2019 Ram 3500 Limited
2019 Ram 3500 Lone Star
2019 Ram 3500 SLT
2019 Ram 3500 Tradesman
2020 Ram 2500 Big Horn
2020 Ram 2500 Laramie
2020 Ram 2500 Laramie Longhorn
2020 Ram 2500 Limited
2020 Ram 2500 Lone Star
2020 Ram 2500 Tradesman
2020 Ram 3500 Big Horn
2020 Ram 3500 Laramie
2020 Ram 3500 Laramie Longhorn
2020 Ram 3500 Limited
2020 Ram 3500 Lone Star
2020 Ram 3500 SLT
2020 Ram 3500 Tradesman
2021 Ram 2500 Big Horn
2021 Ram 2500 Laramie
2021 Ram 2500 Laramie Longhorn
2021 Ram 2500 Limited
2021 Ram 2500 Limited Longhorn
2021 Ram 2500 Lone Star
2021 Ram 2500 Tradesman
2021 Ram 3500 Big Horn
2021 Ram 3500 Laramie
2021 Ram 3500 Limited
2021 Ram 3500 Limited Longhorn
2021 Ram 3500 Lone Star
2021 Ram 3500 SLT
2021 Ram 3500 Tradesman
2022 Ram 2500 Big Horn
2022 Ram 2500 Laramie
2022 Ram 2500 Limited
2022 Ram 2500 Limited Longhorn
2022 Ram 2500 Lone Star
2022 Ram 2500 Tradesman
2022 Ram 3500 Big Horn
2022 Ram 3500 Laramie
2022 Ram 3500 Limited
2022 Ram 3500 Limited Longhorn
2022 Ram 3500 Lone Star
2022 Ram 3500 SLT
2022 Ram 3500 Tradesman
2023 Ram 2500 Big Horn
2023 Ram 2500 Laramie
2023 Ram 2500 Limited
2023 Ram 2500 Limited Longhorn
2023 Ram 2500 Lone Star
2023 Ram 2500 Rebel
2023 Ram 2500 Tradesman
2023 Ram 3500 Big Horn
2023 Ram 3500 Laramie
2023 Ram 3500 Limited
2023 Ram 3500 Limited Longhorn
2023 Ram 3500 SLT
2023 Ram 3500 Tradesman
2024 Ram 2500 Big Horn
2024 Ram 2500 Laramie
2024 Ram 2500 Limited
2024 Ram 2500 Limited Longhorn
2024 Ram 2500 Lone Star
2024 Ram 2500 Rebel
2024 Ram 2500 Special Service
2024 Ram 2500 Tradesman
2024 Ram 3500 Big Horn
2024 Ram 3500 Laramie
2024 Ram 3500 Limited
2024 Ram 3500 Limited Longhorn
2024 Ram 3500 SLT
2024 Ram 3500 Special Service
2024 Ram 3500 Tradesman
