Would be interesting to see how they checked the stator overrunning clutch. Checking it by hand could allow a bad unit to pass inspection. Unless you apply enough torque it’s conceivable that you could have a stator cam that’s lost it’s spline lock.

I have seen that in diesel converters, they will pass the “finger test” we spoke of but will fail the bench test. We are talking hundreds of pounds to test the unit on the bench.