Hi again, well when I was trying to investigate the vibration issue on my 97 300tdi I decided to jack the whole car up run the car and accelerate and see if I can find what is causing it. First thing I noticed when the car was driving only 3 wheels were spining in the air the rear passanger wasn't. However when I accelerated I did begin to spin - strange! I checked teh pads and they dont seem to be stuck on. Any ideas?

Thanks

http://www.landyzone.co.uk/lz/f8/4-wheel-drive-177325.html
this may help you or may not lol worth a read anyways

I'm guessing you just have a standard rear open diff and the brake on the rear wheel might be dragging or could be the wheel bearing.