2001 Lincoln Navigator Q&A

2001 Lincoln Navigator Question: how is a sector shaft or intermediate shaft damaged? I have a groove in mine

there is some kind of box that was rubbing against it. I believe this box housed the sensor for my front air ride that was disconnected when I got converted to shocks in the rear but the box was never mounted back it was pushed out of the way. Over time it has produced a groove and fails the state safety inspections. I also had a front end collision and was wondering if that could be a cause for the box or the mechanic just didn't mount it back -
Answer 1
could be caused by lack of lubrication or normal movement -