Mishimoto 2017+ GMC 6.6L Duramax L5P Transmission Thermal Bypass Valve Kit Drivetrain~Transmission Pans 1994 GMC C3500 Sierra SL

1994 GMC C3500 Sierra SL

Ram: 2500 11 - 24 6

Fuel Pump to Rail Line

multi-angle valve job

2017 Subaru WRX Base

Mishimoto 2017+ GMC 6.6L Duramax L5P Transmission Thermal Bypass Valve Kit Drivetrain~Transmission Pans 1994 GMC C3500 Sierra SLThe 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