The definition of a pattern failure as far as transmissions go is seeing the same wear issue or broken part in every transmission of that type. This is such a case.
We have similar transmissions in two different car makes, the 6T70 from GM and the 6F50 from Ford. These transmissions are almost identical as far as the internal parts and pieces go, but they are controlled differently. The parts that fail in the 6T70 are different from those that fail in the 6F50, say the manufacturers.