Gears & Axles - Another Blown 10 Bolt

Not even a month after my brother finished rebuilding the ls2. He thinks he might have driven it for a few a while like this as he recalls some one behind him flash their lights on the way home from work. It wasn't until he was going to back up in the drive way that it locked up.

http://i191.photobucket.com/albums/z83/execrat/04212010440.jpg

http://i191.photobucket.com/albums/z83/execrat/04212010441.jpg

http://i191.photobucket.com/albums/z83/execrat/04212010442.jpg

Only this head broke off
http://i191.photobucket.com/albums/z83/execrat/IMG_1319.jpg

http://i191.photobucket.com/albums/z83/execrat/IMG_1321.jpg

torsen assembly bolt,there was another recent post with identical situation.
http://www.ls1tech.com/forums/gears-axles/1234322-how-did-break-my-10-bolt-pic.html