I am rebuilding my tranny on my 83 300SD. All the pictures that I have been able to find on the internet illustrates the locations of where all 19 balls go. My problem is that my tranny only uses 18 balls (confirmed). I don't know where the proverbial "19" ball doesn't go when the "18" ball configuration is used. My tranny model/serial number is 722.303 02 368507. Hopefully, someone has a factory manual for this car that details where the ball doesn't go.

Page 18 of the ATSG manual has a good picture of where the balls go and shows a ball 2nd closest to the bolt hole that is dead center. It says its a rubber ball that is slightly larger than the rest. Is this my "missing 19" ball?