intermediate vicious vibration when up to 70 mph

[Flashman65]

Can anyone help please?

I have a 2012 Vouge 4.4 TDV8

When I get up to around 70 mph there is an intermittent vibration from the front as if I'm going over rumble strips, its quite violent. If I power on it goes and if I slow down it goes. Its not every time but I would say 50 %. I have swapped the wheels and I have had them aligned but it still happens. I have checked tyre pressures too. Do you think its a speed sensor or something on the suspension, if there is such a thing?
I would really appreciate any feedback.
Many thanks

[coetzeeh]

I had a similar issue albeit different car which turned out to be bent alloy but as you have changed wheels it probably rules this out.

I would check for warped brake discs and worn suspension bushes.

[CAPP0]

I've had 2 L322s and had this on both, it turned out to be a sticking brake caliper (rear both times). Cheap and easy fix.

There are also some stories about issues with the transfer box causing this, but I seem to recall that was on the L405 although late L322s may have the same unit.

When you say intermittent, does it come and go when on the same journey, or is that if you slow down it goes away but comes back when you speed up for a bit? That's exactly what happened to me the first time. I eventually found out what it was as the brake got so hot it was smoking!

[Flashman65]

All fixed. It was the front arm causing the issue