I have a 97 and have had it for 2 years, about 5 months after i bought it, I had to replace the middle U joint. Then another 5 months the rear U Joint went, and i noticed that there was a little bit of vibration in the back. 4 months later it had to be replaced again but the vibrations were very noticeable, and recently the rear one is gone again. today I phoned a mechanic, and i was told that the whole drive shaft had to be taken out, and everything replaced(U joints Support Bearing), and balanced. Is that true? Or what should I do?