2006 XC70 Vibration at 20mph and 60mph

[egornygr]

I recently purchased this vehicle which had a slight vibration in the cabin (not in the steering wheel) between 55 and 65 MPH. I thought it was a tire out of balance, so I had all four re-balanced. Didn't make a difference.

So I did some poking around and some posts indicated it could be an axle - mostly likely the front right. I replaced it with a rebuilt one from FCP, and upon inspection of the old axle I was sure I had the problem fixed. The old one had some visible decay and the splines from the transmission were rusty - see pics.

But I got it out on the road and not only does it still vibrate around 60, it has a new vibration at 20mph! Not sure what could have created this, aside from a defective part.

Any thoughts on what to do next would be greatly appreciated.

Thanks.

[JRL]

Check the lower engine mount (right side of car)
If it's collapsed the engine is touching the subframe and WILL cause odd vibration.
They usually fail at around 100K miles

[egornygr]

Thanks JRL,
That engine mount was recently replaced and looks good.
I think the rebuilt axle is the issue. I put the old one back in and the 20 mph issue is gone.
Will be following up with FCP for a refund.