Limited slip installation.

If it has any backlash at all, you're probably good. I have an old friend WL Kitchens in Warner Robins, Georgia whose a renowned old drag racer all over the southeast. He used to set them all up at zero backlash and let um "wear it in". I never saw him have a failure. lol Although I'm sure he probably should have. He's deep in his eighties now, but still races on occasion.