Tdi driveline vibration

[wally]

My Tdi crew cab has a slight vibration under acceleration. It's not really evident at lower speeds, and pretty much goes away on over-run. It's a driveline thing - I don't feel it through the steering wheel. What are the possible sources of this vibration? I'm thinking maybe one of the driveshafts a little bit out of balance. It could, I suppose be a wheel out of balance - I haven't had them checked since I bought it. But what else should I consider?

[wrinklearthur]

Watch out for the large nut on the rear output flange coming loose, the rear drive shaft needs to be undone off the driving flange to get at it.

At the same time, I would check to see if the rear seal hasn't started to leak, the hand brake drum needs to be taken off for that check.
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[roverrescue]

check the uni joints if its when under power but goes away on coast

S

[OLD]

check the uni joints if its when under power but goes away on coast

S

I'd suggest the same - two of my uni joints were fairly worn, so I had all four replaced and the vibration I was experiencing is now gone

Martin

[wally]

I'd suggest the same - two of my uni joints were fairly worn, so I had all four replaced and the vibration I was experiencing is now gone

Martin

I replaced one of the unis (probably unnecessarily), the others are fine.