Description
The Mishimoto MMTC-L5P-TBV is a Transmission Thermal Bypass Valve Kit engineered specifically for Chevrolet and GMC trucks powered by the 6.6L Duramax L5P engine. Rather than a generic, universal fitment part, this kit is built around the exact cooling architecture of the L5P platform, giving owners a dedicated hardware solution for transmission thermal bypass control instead of a one-size-fits-all substitute.
As part of Mishimoto’s broader Cooling lineup, this bypass valve kit is designed to work within the transmission cooling circuit of the L5P-equipped truck. Mishimoto has built its reputation around cooling system hardware, and this transmission thermal bypass valve kit continues that focus by targeting a very specific, model-correct application rather than a broad, multi-vehicle catalog fit. For Duramax L5P owners searching for a component that matches their exact transmission cooling setup, the MMTC-L5P-TBV is designed to be a direct match for the platform’s factory bypass configuration.
Vehicle Applications
This Mishimoto Transmission Thermal Bypass Valve Kit is designed to fit Chevrolet and GMC trucks equipped with the 6.6L Duramax L5P engine, covering model years 2017 through 2019. Fitment is specific to this engine and model year range, making it a targeted choice for L5P truck owners rather than a broad cross-platform cooling part.
Features
- Transmission Thermal Bypass Valve Kit format
- Engineered for the 6.6L Duramax L5P engine platform
- Direct application for Chevrolet/GMC L5P trucks, model years 2017-2019
- Manufactured by Mishimoto under part number MMTC-L5P-TBV
- Falls within Mishimoto’s Cooling product category
Specifications
- Brand: Mishimoto
- Part Number: MMTC-L5P-TBV
- Product Type: Cooling
- Component: Transmission Thermal Bypass Valve Kit
- Vehicle Fitment: Chevrolet/GMC 6.6L Duramax L5P, 2017-2019
Frequently Asked Questions
What is the Mishimoto MMTC-L5P-TBV?
It is a Mishimoto Transmission Thermal Bypass Valve Kit, part number MMTC-L5P-TBV, listed under Mishimoto’s Cooling product category.
Which vehicles does this Mishimoto bypass valve kit fit?
This kit is designed to fit Chevrolet/GMC trucks equipped with the 6.6L Duramax L5P engine, for model years 2017-2019.
Does this kit fit earlier or later Duramax engines outside the L5P?
The listed fitment for the MMTC-L5P-TBV is specific to the 6.6L Duramax L5P engine in Chevrolet/GMC trucks from 2017 to 2019; no other engine applications are specified.
What type of component is included in this kit?
The MMTC-L5P-TBV is a Transmission Thermal Bypass Valve Kit, a cooling system component from Mishimoto’s Cooling lineup.
Is this a universal or vehicle-specific cooling part?
This kit is vehicle-specific, designed for Chevrolet/GMC 6.6L Duramax L5P trucks from 2017 to 2019 rather than universal fitment.
âš WARNING (California Proposition 65): This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.












