Fixed mine in a '94 a couple times, and the fixes were fairly easy. Just contact cleaning twice and a rebuild once.
There was that time when the bolts holding the entire assembly rusted through and the steps detached from the RV frame and swung free. Bent some stuff and cracked open the gear case. Even then was able to straighten everything, lube the gears, brighten all the contacts, bolt the case back together, add new stainless bolts and nuts to hold the step assembly in place, and, ta da good as new.
Point is that they are pretty easy to work on, especially if you have a grandson to take it off the RV for you so you can take it into the shop.