Look at the ramps on the male sprags. There will be indentations in them where the balls have rolled up them too often and pressed against them too hard, if there is wear. I suggest you post close-up pictures of the ramps so we can see how much wear there is. We should also be able to see if the sprags have been reground already. If it has been reground then has worn a new set of grooves, it will be time for replacement.
