Honda Jazz is shuddering

Have you brought it to Honda's attention through one of its dealers? If so it should have been fixed a long time ago, but if you haven't taken back to a dealer there's no way it could have been fixed. Changing the transmission oil, using a Honda recommended oil, would have been the way to fix it. Yours could have gone beyond the stage that it could be fixed with an oil change, but I would still consult a dealer to check.