It was fine. When i put it in reverse there is a scraping noise coming from the box. I think it is dead :/
I've just had my LY7 2008 Calais with M82 it showed metal filings on magnet and he told me the torque converter was failing he basically took me for a easy $600 never will he touch my car ever again. I did take it to another transmission place and was told nothing wrong with torque converter it only needed TCM sensor and some new transmission fluids.
I've never had misfire or issues with M82.I wish you good luck in finding another M82 very much they are NOT WORTH A REBUILD.