In the process of converting from auto to t56 manual gearbox. When putting the new manual tailshaft into the slip yoke/ rubber donut coupling/ tailshaft, it doesn’t seem line up correctly as circled red in the photo.
When rotating the tailshaft the gap between the donut and slip yoke opens up but closes flush correctly again towards the top as if something is warped. Tailshaft recently rebalanced. If I bolt up everything as is right now the donut is very warped.
Any clues what would cause this?