Originally Posted by 98_jeep_xj
which years had hardly no floor rusting issues?
Any year that lived in the South or Southwest. I don't think any particular year was significantly better or worse.
You should be able to tell quite a bit just from rapping on the floorpans from underneath. Can't always tell by looking because undercoating hides a lot, but tapping with a screwdriver works. If all you have is a bit of surface rust under the carpets, that's easy to take care of.