Originally Posted by
Steely Dan
that's odd, i have an alfine 8 and it makes angry crunching noises when i've mistakenly tried to shift under load. in the 2 years i've been riding the bike i have come to master the little split second stutter in my pedal stroke when shifting. it's like the clutch for a manual transmission in a car.
That's the way mine works too, although sometimes when attempting to shift under load it won't make any strange noises but it also won't bother shifting either. It'll wait until I quit pedaling for a second.
One benefit of the higher ended Shimano IGHs is silent coasting. Newer model Alfines and Nexi are super quiet.