Mishimoto 2017+ GMC 6.6L Duramax L5P Transmission Thermal Bypass Valve Kit Drivetrain~Transmission Pans multi-angle valve job

multi-angle valve job

2017 Subaru WRX Base

2017 Nissan Titan XD Platinum Reserve

1994 GMC C3500 Sierra SL

Great Add-On To ARP 250-4202 Head Stud Kit (sold separately)

Mishimoto 2017+ GMC 6.6L Duramax L5P Transmission Thermal Bypass Valve Kit Drivetrain~Transmission Pans multi-angle valve jobThe Allison transmission is the backbone of your L5P Duramax. It's responsible for transmitting large quantities of torque from your V8 diesel powerplant. This torque generates a lot of heat, and if that heat isn't dissipated, it can destroy your transmission. The transmission cooler does a good job of keeping trans fluid temperatures in check, but only if the fluid can reach it. The stock cooling system of the Allison 1000 transmission utilizes an in