There’s a channel called “DemonWorks - 3.0 Duramax Diesel LM2 LZ0“ and he put out a video yesterday showing how the techs check the engine to determine if the thrust bearing is bad. He opens the inspection plate on video and moves the torque converter backwards and forwards. In the video you see it slide what appears to be a 1/4 inch or more. Great video showing how bad the problem is with the engines that have bad thrust bearings.