Mazda 3 TCM, Automatic Transmission Fix

In this video I diagnose my Mazda 3 gearbox issue. The TCM is a common issue on these cars over a number of years. The TCM is located on top of the hot gearbox and right under the battery box. Its a poorly thought out location for such a sensitive electronic box so I relocate mine. The new location means it now easy to remove if it ever fails again.