Noise between bellhousing and Engine

Oldmanmopar said

We had one that had a weld on a heavy metal slug on the rear counter weight hitting the rear edge of the block. The thrust bearing was wore. Push and pull front to back on the crank with some type of pry bar See if it has a lot of movement.

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Well I changed the oil tonight. After I changed it, I started the vehicle up. Noise was still there. It's never been there with cold oil. Everything else in the truck was warmed up. I'm almost thinking maybe I've got a trans/torque converter noise... really seems louder near the bellhousing. Just strange as the truck shifts fine. Any insights on the possibility of torque converter noises?