Hello guys & gals. I have an 04 6/MT sedan with 137k on it. recently i have been having a weird humming/whining noise when I get my car up to speeds 75mph+. Along with the humming the shifter also seems to vibrate more than it should. The noise seems to come from underneath the gearbox. I personally feel like it may be the drive-shaft that causing the noise but still I'm not sure. Before I take it in I wanted to get some input.

Thanks in advance