Throw out was repalced with an OEM one when the 2nd trans went in. Also, based on clutch pressure, I cant replicate a scenario that would point to TOB, the noise in neutral only goes away when the clutch is completely disengaged, you can hear the noise "spin down" and go away once the clutch disengages as the input shaft stops spinningOkay, thanks. Spun bearing. I've looked at this about a dozen ways. I doubt the second transmission will have a spun bearing on the main input shaft. So the bearing locked up one day and spun on the shaft. Not necessarily a repeated event. That's what you are looking at. This bearing is way in there and on the middle of that shaft. Just put the new transmission in with due care and you should be good. Tranny #2 might just have a noisy throw out bearing or something like that.