6L80 6L90 8L80 8L90 10L90 Transmission Thermostat Bypass Valve Kit Cooler Flow Bypass For GM Trucks And SUVs, Keeps Transmission Temp Low Up To 20 Deg F For Tow Ready Performance Prolongs Transmission Life

GM Trans Thermostat Bypass Kit for Cooler Flow, single kit
✔️ Lowers transmission temps up to 20°F; direct bolt-on GM fit.

This transmission cooler flow bypass valve kit is a bolt-on upgrade for GM trucks and SUVs that helps regulate how coolant flows through the cooling circuit. It's typically used in sports/utility vehicles and pickups with GM 6L80, 6L90, 8L80, 8L90, or 10L90 transmissions to improve cooling during towing or heavy loads.

✅ Fits GM 6L80/6L90/8L80/8L90/10L90 transmissions
✅ Direct bolt-on replacement for stock thermal bypass valve
✅ Reduces operating temperature by up to 20°F in many conditions
✅ Heavy-duty construction resists high temps and fluid exposure
✅ Includes gasket; no additional tools required for install

💡 What is a transmission thermostat bypass valve kit and why install one?

It's a handy upgrade that helps control cooling flow in GM transmissions. - Improves cooler circuit flow for towing and urban driving - Built-in safety bypass protects against low-flow overheating - Direct-fit replacement for GM 6L80/6L90/8L80/8L90/10L90 models✝️