OE cooler bypass valves allow transmission fluid to bypass the cooler and flow right back into the transmission, quickly raising the transmission temperature. These OE cooler bypass valves tend to fail, causing the transmission and torque converter to overheat and cause major damage. Our Full Flow Cooler Link connects transmission oil directly to the cooler, keeping the transmission temperature approximately 30° colder and eliminates the risk of the transmission and torque converter overheating. Unlike the OE bypass, our Full Flow Cooler Link won’t plug up and does not need to be removed to flush the cooler.
If you own a 17’- 19’ Duramax L5P this is a must have. I was averaging 185* - 210* temps while towing my 30’ travel trailer. After I installed the Goerend L5p Full Flow Cooler Link, I noticed a dramatic decrease in transmission temps. Now all I see is about 165* - 185* degrees while towing. I recommend this part to all 17’-19’ L5P owners. Thanks Goerend.