Thrust Bearing damage - Why?

tjpatte said

What does the end of the crank and TC snout look like?

I had something similar happen and the TC snout was binding in the crank.

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converter and end of crank looks fine, i checked if the converter fits into the crank during installation. Initially i used an old used converter that got damaged during my first season with this engine (sprag broke), maybe this is where it started......