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've done the majority of my aftermarket mustang parts shopping at American muscle, recently finding out about this website I'd just like to say it is a great experience to shop here, the lay out is easy and simple to navigate, and you have thousands of parts that no other website has. The shipping is very fast and all te updates are great. I will be doin much more shopping with y'all, so thanks for being so badass haha