Ok I have a 95 300tdi with 240,000 miles on it. In the past couple of weeks I have noticed some vibration in the drive train (I think). If I just easy up to speed its not very noticeable but if I accelerate normally I am getting some medium vibration especially at higher RPM's. I want to say it feels like maybe the clutch is not engaged but not sure. I have crawled underneath and looked for anything loose but did not notice anything out of sorts. Looking to see if anyone has had something similar and where to start. Thanks in advance.