Company bought a 2007 Freightliner M2 last fall with about 180K miles on the MBE900 engine. Recently the MBT660 fully automated manual transmission has started to skip into neutral between 2-3 gear and sometimes 3-4. Truck starts the shift then just revs until you let off and then it will complete the shift. Truck is at our repair shop now but they have no clue what the issue is. Thought I would ask here and guess someone else has had this issue and what it took to fix it. Anyone have a clue what is going on?