My V70 has developed a pretty significant low speed vibration. Yesterday I put it on jackstands and was able to reproduce it. Looking under the car I saw the "torque tube" vibrating up and down approximately 1/2 inch. I am looking for help in diagnosing the problem so that I can order parts and either repair myself or take to a repair facility. Any help in this matter will be appreciated.

 

It is a XC correct?
If so usually the front joint on the driveshaft goes bad.