Alright, I figured it out thanks to Andreas Miko. What my friend and I thought was the mid-shaft, really was just part of the CV joint to the passenger side. That is was broke on my SE-R. So I just need to by the passenger side CV joint. This was causing my car not to move at all when I put it into any gear. My car would just rev when it was put into any gear, and the MPH would move as well because the tranny was still reading. So if anyone has this same problem, I hope this helped.