Hand holding a disassembled torque converter or clutch assembly…

These impeller vanes have eroded, probably due to long coolant change intervals. Not only do the steel blades CORrode from old coolant not preventing it; they also Erode due to microbubbles (cavitation) created due to the lowered boiling point.

http://www.fourdoorbronco.com/board/showthread.php?t=5230

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Owner caption January 2005 · Photo 185 of 980