Good point JD. Raising the diff does tend to allow small rocks and debris to get out instead of digging into the diff.

Hellya has an interesting fix - put silicon caulk between the chassis and the diff tube.

- Put a piece of tape on the tube to prevent caulk sticking to it.
- Fill in front, under and back of area between diff tube and chassis.
- Let it cure.
- Rotate diff to remove tape.

It creates a close-tolerance barrier to keep stuff from even getting close to diff tube.