I'm the Winnie Class C owner that j-d referred to in his post above. I didn't think I had anything to add the info already in the thread, especially since we have had no problems with the slide. This morning I ran through the 100 or so RV maintenance related bookmarks that I've collected over the years (just in case I needed a reference) and found three related to slideouts.
Winnebago Service Tip - helps to identify which type of slide mechanism you may have. The first diagram looks like ours. We have one of these on each end of the slide.
An earlier thread with a picture of the guts of the slide screw, as well as some other info.
Kwikee slideout support info. Check out the manuals and troubleshooting guide flow charts. The solution may be there.