The Diesel Performance Podcast welcomes Phil Grandinetti, a GM transmission expert and service manager for Calibrated Power. The Allison transmission is purpose-built to handle the torque supplied from the Duramax engine, a job it does very well. But once you modify the engine and add extra horsepower, things can go wrong if you fail to consider what those changes do to the transmission. Phil gives Paul and Danny insight into how to best troubleshoot transmission issues. They describe transmission symptoms and fixes along with preventative maintenance every Duramax owner should perform. This is an excellent podcast for those new to diesel performance as well as the experienced Duramax owner.