I am coming to the party late and really don't want to read the entire thread. I have had my 2015 for about 4 months. There is a noticeable whine at take off. From what I gather that is not normal or good?! And I should replace or add to the Angle drive oils with Lucas Heavy Duty Oil Stabilizer? I have also noticed that my belt tension seems a little looser then I would have it. Is there a spec or recommendation as to what it should be? Thanks in advance for your help.