This is what happens when you put a street and strip converter behind a 6-71 blown SBC in a Model A hot rod. The sprag rollers were completely gone, which means the were ground up and went through the trans. I was able to save the T350 but there was a lot of damage in the front half. I suspect the converter was ballooning, and the rear most bearing popped out of place an disintegrated .That allowed the stator to slap back and forth and punch out the inner race and rollers, causing them to bend all the fins over. This particular unit was a later model that had a furnace brazed impeller, and a welded in turbine hub (as opposed to riveted in) But you can see that didn't save it in this case.