Agreed. You're thinking too much.

Find something worthwhile to worry about. The ONLY time the bearing or bushing has relative motion is when you're shifting and the synchros are speeding up or slowing down the disk, or when you have it in gear with the clutch pedal depressed. When it's not in gear with clutch pedal depressed it may or may not be spinning.

In other word all this angst about bearings or bushings is just wasted energy.

R.