WCFAB Transmission Cooler Thermostat Bypass Plug WCF100469 | 2017-2019 Duramax 6.6L L5P

Wehrli Custom Fab WCF100469 Transmission Cooler Thermostat Bypass Plug

Purchase the Wehrli Custom Fab WCF100469 Transmission Cooler Thermostat Bypass Plug and replace the failure-prone factory thermostat with a reliable, direct-fit upgrade. This bypass plug reduces fluid flow restriction to the transmission cooler, lowering fluid temperatures by 15–50°F. When the factory valve fails, transmission fluid bypasses the cooler in warm weather, leading to dangerously high fluid temps. The WCF100469 is the perfect solution for trucks that perform heavy towing in hot climates.

Features:

• CNC-machined billet aluminum construction
• Durable black anodized finish
• High-temperature silicone O-ring seals
• Reduces fluid flow restriction to the transmission cooler
• Hassle-free, direct-fit installation
• Lowers transmission fluid temps by 15–50°F
• OE-style replacement for the weak OEM thermostat
• Simple transition back to OEM setup for cold weather use