Mjmarlowe-
That gear looks a lot like the Lippert 165983 (link
here). I suggest you call Lippert, with this part number in hand, and ask them to help you identify the steps and its parts. Customer service info, from one of their Web pages, is:
(574) 537-8900
customerservice@lci1.com
The drive looks like one made by Coachstep. Lippert bought them out. See the Coachstep slide products
here. If it's determined that you have Coachstep steps, please note there was a safety recall on certain Coachstep steps. Link to recall information is
here.
Lippert owns the Kwikee brand, too.
In my opinion, the gear in your photos looks OK.
You should add a "signature" to your profile. It contains whatever info you want; most people put info about their coach there, so they don't have to type it into each message. Instructions for adding a signature are
here.