There is a tsb on this. The death pin shears and the cross shaft walks out. There are some small "tangs" you can buy to hold the cross shaft in if the death pin shears

Replace the death pin put the shaft back in - or replace the shaft if it's damaged and it will likely run.

Buy the updated tangs though !

Edit. Try to stay with the same year transmission -people have had issues with different years and controllers.

If it were me if slap it back together and jb weld the case. Got little to lose