Your Mustang Rear Differential Cross Pin is considered a wear part & will eventually need replacing. From stock replacement to notched for lower gears we have all varieties of Mustang Cross Pins for both 28 spline & 31 spline Differentials. Don't forget a new Mustang Cross Pin Bolt while you're there! Also, once you start making power & applying it to the ground with slicks, you very well may spit out a set of spider gears. We have you covered there too with replacement Mustang spider gear sets for both 28 spline & 31 spline carriers.
I have been ordering items from Latemodel Restoration for many years. I've found them to be exceptionally professional, timely with order processing and shipping correct items ordered. I've never received an incorrect item on an order.