Crank Thrusting Foreward Issues

And then while doing the autopsy, figure out what ate the thrust bearing.

If it's an auto, you can bet that the converter was incorrectly installed.

If it's a stick, some cranks weren't drilled deep enough. You see this when you buy an unknown crank, or convert from a stick to an auto.

If you don't figure out what happened, it will happen again.