Yeah, that hole is likely from that loose spider gear getting wedged between the ring gear and housing. It might have been the cause of the rest of the gear damage when it locked up.
Kevin 1951 Chevy 3100 work truck Follow this saga in Project Journal Photos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together.