Mine failed a few years back. This was while parts were still available. There are plastic gears inside and the small one on the motor split in two. I recall that someone was making replacement metal gears, as this was a common failure point. You might search the Internet to see if you can find that source. I regularly look at this site, as well as the Monacoers and ramblin-pushers yahoo sites, so it was probably in one of those sites.
Dick L, '04 HR Imperial