Diff Broke!!

I put in a vittesse 3.89 diff in a couple of weeks ago as the 4.11 in was whining, well today the vitesse diff let go big time, the carrier that holds the planetary gears just sheared in 2!
















i also found out that there are 2 types of large diameter stub axle, i would think the one without the reccess just after the splines would be the stronger of the 2! ( the one on the right)