Slightly Embarrassing Question

Moper- you may be onto something. I did NOT dial-indicate my bellhousing. I thought about it, but I’ve been through that before and it was a lot of trouble for unknown benefit. But I have no chatter at all. Could bellhousing alignment be off so much as to cause pretty significant vibrations in the drivetrain? If it was off that much, wouldn’t I likely have other symptoms? But I have never checked planimetric alignment of the transmission / driveshaft. I’ll do that tomorrow.

I have swapped out both front and rear u-joints; even put on a new slip yoke. Each action changed the vibration ever so slightly but nothing has alleviated the condition.