'Bout everybody I know that drives an Alfa has made the first gear crunch. It only happens when the engine is running and the clutch is not depressed. That allows the engine to turn the input shaft and the counter gear in the TX. If you are standing still, you have to intentionally stop the input / counter gear or you will grunch the 1st gear dog teeth when you try to shift directly into 1st. You can prevent that from happening as we all learned.
You do this by:
1) shifting into 2nd or some other gear to use its syncro to stop the rotating parts (you only have to push onto the syncro ramp, not actually engage a gear), THEN shifting to 1st ;
2) fix the stupid first gear syncro design by installing the missing parts as described. Then you just shift into 1st from the start.
I always felt that Alfa was being as penny-cheap as a Chevy for leaving out these (originally) $2 in parts. AND they had to machine the inner part of the 1st gear differently than the others, AND they had to make a different hook cog part.
It was just dumb! Anyway, that's why I developed this fix, and why I posted it here after hearing so many BBer's complain of the stupid Alfa Grunch!