I have a leaking left rear brake line in my 98 TJ SE. It's leaking right where the metal line goes into the threaded fitting. I have tightened the fitting as much as possible yet it still leaks. Does that sound like there may be a hole in the line or a problem with the fitting itself? I have never messed with brake lines, if it needs a new line, is this something that is fairly mechanically inclined but has never done that could do without much hassle?