checked one out in the middle of a field for a guy a few years back with a similar problem. Took a little looking and searching, and finally found a tooth that had broken off a gear wedged in another (reverse idler if I remember correctly). He could not tow home or load it without dragging the rear wheels. I manged to use a long screwdriver, and push the piece out of the gear and he was able to get it home to work on it. One of the more unusual repairs I have ever made on a call while working for the telephone company.
"The Constitution is not an instrument for the government
to restrain the people, it is an instrument for the people to restrain the
government lest it come to dominate our lives and interests." Patrick Henry