The old saying goes, “Out of sight, out of mind.” So, unless your Mustang’s rear axle has been complaining, it’s easy to take it for granted. Aside from receiving stronger shafts or a steeper gear set ...
Good question. The answer lies in who's asking, and the intended use of the car. That's because while a live axle performs well on smooth pavement, an IRS handles better on bumpy, twisty roads.