may be a long shot but make sure none of the ballance weights have been knocked off the propshafts,maybe a mark where it used to beHi all. I would appreciate any ideas over a problem that my 2005 TD4 has developed. The original problem was a clunking from under the drivers seat when turning at slow speed, after getting some good tips off the site I discovered both VCU bearing shot, I had these replaced by a local garage with the cheaper variants. On the first drive after replacement, the car vibrated quite severly at around 40-50 MPH. Had the bearings realigned but the problem remained. The vibration was present both in and out of gear. The clunking problem was eliminated.
I replaced the cheaper bearings with LR originals thinking that they had caused the vibration. Test drive resulted in same symptoms. Numerous trips back to the garage to have the bearing realigned was fruitless. I then removed the prop and VCU assembly and the problem went away.
I have since replaced the oil in the IRD and rear diff and replaced the 3 UJs on the front and rearpropshaft. Refitted the Prop assembly and the problem remains. The vibration was not present before the bearing replacement. Any ideas would be welcome.
Forgot to mention that all four tyres replaced recently but again this made no difference.