Because I did:
Pretty surprising failure to me, apparently the only thing holding it together was being bolted to the crank on one side and the torque converter on the other side. The shop replaced it and the rear main seal while they were in there, so that's a plus. But now it's back in the shop because the starter was making grinding noises with the new flywheel, think it wasn't engaging completely.
The joys of an old vehicle!