I'd try jacking it up, and put it on stands. Then put it in gear, and try to replicate the vibration. You might be able to narrow it down if its immobile, with only the drive train in motion.
Hi Travis,
Pretty sure I did that already. Good thought for me to double check that. This is what made me ask about the converter. I will check this tomorrow. Sure do appreciate the support here. I will post back this weekend.