Mishimoto 2017+ GMC 6.6L Duramax L5P Transmission Thermal Bypass Valve Kit Drivetrain~Transmission Pans 1996 Chevrolet K1500 Cheyenne

1996 Chevrolet K1500 Cheyenne

1994 GMC C3500 Sierra SL

Convert your LML's fuel system from a CP4 to a CP3

Fuel Pump to Rail Line

2010 Chevrolet Silverado 1500 LT

Mishimoto 2017+ GMC 6.6L Duramax L5P Transmission Thermal Bypass Valve Kit Drivetrain~Transmission Pans 1996 Chevrolet K1500 CheyenneThe 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