I to have a 97 TJ. About a year ago the turn signal switch locked up and had to be replaced under warrenty. Since then (perhaps before) I have noticed the same problem. The noise only happens when below about 55 degrees when the jeep is still cold. When it warms up it goes away. there was an old post a couple of weeks ago about a different vehicle, same problem. they talked about spraying some sort of lubricant in the column wear the plastic might rub. I'll watch this post too, as I would like ideas to fix also steven