Thrust Bearing damage - Why?

For a crank to turn purple,gold or blue only on the one side of the thrust, there was a forward pressure involved. There is something not right regarding the torque convertor or how it's connected!
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yep.
Seen that on a deal of mine. Ended up the convertor caused it
LA stroker/727
Was so bad the balancer actually moved in an out if you looked at it closely