Thanks for all the quick replies. Here are some answers to your questions:
It does not seem to jam from tray one, the manual feed tray.

The last 10 or so entries on the event log are 13.1 50 paper feed 1. paper late jam errors. This are also 13.6 30, 13.20 50, and 13.20 30 errors from about 1200 pages ago.

I've already replaced the transfer roller, but the paper doesn't even get that far.

I think it is that "hidden roller" but I'm not sure where to get a replacement or how to replace it. I only see maintenance kits at printertechs. I do believe this printer has a lot more life it in if I could get this jamming to stop.

Thanks,
Jenn