So I went out to go to work today and low and behold it will not go in reverse! It's a 2000 TJ manual 5 speed. All other gears will work and also work in 4x4 just not reverse and bad part it sounds like grinding when I go into reverse ugh any thoughts ?? Also last night I removed the skid plate to sand and repaint had some light rust, it's still drying so I have not put it back on yet. This wouldn't cause this would it?