Vibrating front end whilst feathering the throttle on the motorway

[leecool]

Hi there guys, I have a strange one here!
Yesterday I drove to London from S Wales & I noticed that when I was at around the 69-72mph I had a strange sort on vibrating/fluttering sensation, a bit like that sound when you open just the rear windows on your car on the motorway, it's coming through the throttle pedal & floor!
Now whilst accelerating it's not there nor on the over-run, just when I feather the throttle to keep it around 70mph. It felt perhaps like a misfire but why would it stop on slightly harder acceleration? Could it be a CV joint or wheel bearing, I don't know? It did get a little worse on the return journey.
Hopefully the knowledge of other members could help & it would be appreciated greatly!!
thanks guys!!

 

[leecool]

I forgot to mention that I have a 2007 8p dsg 2.0 tdi 140 bkd. Have had a new DMFW 4 years ago & have had the dsg serviced 3 years ago.

 

[danielwaghorn]

Wouldn't be the wheels being slightly out of balance on the front? I've had this before only under acceleration after getting new tyres, got the wheels rebalanced and fine since.

 

[leecool]

I wouldn't have thought it's tyre related as it would shake on the over run when I throttled off a little, it doesn't do this, only when lightly touching the accelerator to maintain speed & not through normal acceleration.
I know plenty about cars n that as I've worked on them for years but this is weird!!
cheers for the reply, just you and me on here today lol.

 

[Marek196c]

normally on highest mph are the alignment related vibrations, and on lowest tie rods (that been told to me when I was checking my alignment)

 

[audismart]

Could be your flywheel.

 

[Tezgreig]

Lower engine mount to subframe possibly shot