It is sure sounding like you have a backfeed problem. Might not have been an issue in beans since there is less volume of material needing to be moved. Again, I can't remember exactly on those machines, but is there a slip clutch on that driveIJ If so, that should be giving out rather than the auger_shaft destroying itself. If there is, I'd be taking that clutch apart and trying to figure out why it is not slipping until you can determine for sure what your root problem is. Yes, I'm in west-central WI.