What's That Sound?

Good idea. Hopefully you used loctite on them. Had a buddy ruin a perfectly good 440 not using loctite because he was a cheap ***.
I didn't touch the converter bolts in my work. But it got me thinking about the trans pressure. The last time I had an issue with the kick down linkage being out of adjustment it made a grinding sound too...I don't know what t was but proper adjustment stopped it.