Seller notes

Wehrli Transmission Cooler Thermostat Bypass Plug Fits 17-19 GMC Duramax 6.6L .no-subscribe { display: none} [contenteditable] { pointer-events: none; }As a direct replacement for the failure prone OEM thermostat, the Transmission Cooler Thermostat Bypass Plug can drop fluid temperature from 15-50 degrees F by reducing fluid flow restriction to the trans cooler. In the stock application, we've seen the valve fail forcing trans fluid around the cooler in warm weather conditions that cause dangero...

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