Sorry to revive an old thread, but did you find a fix to this issue?? I am experiencing the same issue with my 2008 EX35. Manual mode is no longer functioning, and I am out of warranty. The cost of the shifter assembly is too high for my budget, so if there is any way to fix this, please let me know. This problem occurs when my engine is cold or hot so I ruled out the possibility of this being an issue with the transmission oil. I have seen/heard a LOT of other G35/EX35 owners experiencing this problem, but most have been lucky enough to have this happen with their cars still under warranty.