So far, no problems. Shifts like it did when new.
We didn't find a smoking gun, so if it happens again, we're lost.
Like I said before, there was some dried grease on the pilot bushing when we pulled it out. It was lubricated on installation by a thin film of motor
oil. This dried grease could be just enough to cause the input shaft to drag just enough to keep it spinning when the clutch was disengaged.
This time, we used a light application of high temp wheel bearing grease (Tremec told us to use it) on the inside of the pilot bushing. So, if the problem doesn't reappear, then that was the culprit, though I can't figure out why engine
oil would dry out like that. Is the end of the crank and the spinning input shaft any hotter than a moving piston? But then, that
oil is circulating isn't it? The new bell housing was .001 better than the one we originally had (.0025 versus .0035) but both are in spec.
Will let you know in about 1500 miles. If it happens again, I'm going to drive it till something seizes or disintegrates.