I'm looking into buying the new auburn diff. with the flip of a switch goes from limited slip to full locker. I want that and 31 spline mosar axles. What do I need for all that? Do I need new gears and driveshaft? If so i have FRPP 3.73's, 4.10's and aluminum driveshaft that are unopened and unused for sale. How well will that stuff work, gains, etc.?