Pam, (Franklin, NC)
Pam, unfortunately, without actually inspecting the slide mechanism and drive unit, it is impossible to tell exactly what happened. And a lot depends on the manufacturer of the slide mechanism. There are quite a few variations out there, produced by different makers using different types of slide mechanisms. If you could identify the manufacturer of the slide out unit, not the RV, it may be possible to ascertain some information as to what may have broken. But the best diagnosis can only be made after a visual inspection. Wish I could be more helpful. (This is the most frustrating part about this job).