now, what is this sound :banghead:

so I remembered today I had a second sending unit for this oil pressure gauge kicking around

cleaned that up, installed it, and oil pressure is right back up where it was
(went to school again today, so I could recreated the trip under the same circumstances and the oil pressure was right back up to 45-50)

I also put the belt back on, but a little looser then before, and no squeal either