Missing a check ball????

Phew!!!! Crisis averted (I hope)!!!! I found the B&M shift kit instructions and it shows a check ball missing from 1971-77 904's........ Doesn't look like my valve body has been modified at all...... It did have all kinds of crap in it from either the clutches or the bands...... not bad, just looks like the sludge I found in the pan and filter when I changed them..... Thanks for the help, guys!!!! Now it's on to rebuilding the rest of the trans!!!!