MD427 -- there has to be something else wrong. Non-defective six pins are stronger than the half shafts or the normal stub axles. If you do a search on here, or other sites that tend to have Jag based rears, you will find a good bit of sheared off stubbies (not uncommon) and twisted half shafts (less common) but I can't even remember a thread where somebody sheared off all six pins. Especially if you weren't doing something like hard launches out of the hole with drag slicks and a 600HP mill (which is a prescription for sheared stubbies). I don't know what the answer is, but it's going to be something we don't often see. Pull all three other wheels (especially the other rear wheel) and give them a really hard inspection. Maybe they're not really pins at all but something somebody whipped up from the hardware store and they're Grade 2 or less? Very strange.
