This is a MUST DO when rebuilding a 6L80-6L90 transmission!!! Gonna tell you how it’s done and why it’s so important. If you want these units to last you must fix the common failures with the latest upgrades from Sonnax. These units can last longer and handle BIG HORSEPOWER when installing the right sonnax products. Remember you can buy all the billet parts in the world, but if it’s not BUILT correctly, installed correctly, or tuned correctly the transmission will fail. We hope you all enjoyed and thanks for watching. 🙏🏼❤️👍🏼