GM 4l80 Transmission TCC P0894

In this video I diagnose and P0894 on a 2006 Chevrolet Silverado 2500 with a 4L80 transmission. I show how to verify the failure, some electrical diagnostics, and then I cut the converter open to show the failure. In this video I explain why the failure will cause this code. There is a little torque converter theory in this video, but it's not anywhere close to the torque converter lesson I did here:    • Basic torque converter operation   So if you need a tutorial on how torque converters work, watch that video too :) Please comment if you have a question.