Yes, a common fix is to rethread to a smaller size.
The nice part about this fix is that it can be done with the axle in the vehicle and should last until you are ready to tackle a full rear-end rebuild.
The original thread was 5/8-18. You can rethread to 9/16-18. The vendors sell the hardened nuts in 9/16-18 size. Just back off on the torque spec slightly once you go to the 9/16 size.
See this video.
https://www.youtube.com/watch?v=lC_z...5bcpNJQdDfO5H8