My new pair of QT diff guards arrived today from MM 4x4, rear one went on dead easy, 5 minute job. The front however was a different story, dropped one side of the tracking bar off, got the guard into place etc but the top plate doesnt seem long enough, its short bu about 10mm. Has anyone else had problems? Had a look and looks like the diff pan has been replaced at some point, could this be the problem? cheers