At first I noticed the converter wasn't locking up last weekend while running an errand into town. Then last Friday heard some buzzing in park during first start up. Then on the way home the buzzing became louder. Started it up Sunday to pull the truck into the garage, buzzing was now a loud grinding, no gears. Took the trans out and found a bunch of what looks like clutch disk material in the pump, from the converter. Pulled the pump to pull it apart, looks like the pump caught most of the debris but still going to pull the trans apart. Just rebuilt the trans with a bunch of goodies, now need to disassemble again to clean it out and check for any collateral damage. Going to buy a 12" from Precision of new Hampton, HD model, should be good to go.