I definetly see either intermediate shaft or input shaft bearings and some syncro rings... The worst it may have done is deeply scar the shafts and/or damage some other internal parts. It should be fixable man.
**EDIT**
I almost forgot... The bearings probably just naturally wore out. If you are running too thick of an oil though, that will also shorten the life of the bearing.
Lets just stick with saying its bearing failure.