My machine developed a problem a couple days ago. While running, it makes an internal chattering noise in the transmission area. It fades at higher RPM. Oil is full. It does shift using the buttons in ESP mode. I get 11 blinks from retrieving the problem code which points to the ECM motor which does seem like where the noise is coming from. I intend to change the oil next to see if there is debris in it. Any other ideas? Thanks in advance.