I just don't like that some of the mechanics she's used seem to be taking advantage or her. So I'll teach her how to fix it herself and not have to get ripped off. She's already had two different guys rebuild the trans...
At the very least she will have a better idea as to what things "should" cost as opposed to what someone wants and, she will have a better idea of the issues so some unscrupulous mechanic doesn't take advantage is she decides to use one.