drives the impeller hub into your transmission pump
causing the pump to fail.
creates bearing endplay creating premature converter
failure. When the converter balloons, it loses the dynamic
flow through your converter, resulting in loss of
efficiency and horsepower.
Ballooning flanged hubs keep the converter from expanding
outward. The converter will actually become longer from
front to rear when it balloons.
This is just
another of the many things PATC does to their converters
to make them stronger.