Very easy to overcome. No, the auto hasn't been tuned. The auto has been built by Simon Birch (XFT In perth), and by doing this alone has improved the shifts considerably. If the shifts were firmed up anymore, The result will be a input shaft broken by excessive twist. My own software. Nope, Haydn used to have a Xcal1, but not even that is usable now. I connect direct my laptop direct to the OBD port. Ive been able to tune the auto for over 2 years, But we are looking into replacing the input shaft.. The input shaft has been very well known for twisting and breaking.. There's multiple threads of this dating back to when the 6 speed came out. If it had less power, then no problems.. My territory has its 6 speed tuned for the past year.