Perhaps. More like a vibration felt through the seat under load. Usually at 70 MPH up hill. Same in any gear and worse after hot soak. So a motorway stop followed by an up hill cruise at 70 and felt less through the steering. Lifting the throttle kills it instantly and it takes some seconds to reappear when you cruise again.
One of those problems that a garage is unlikely to have time to experience. I hate slow failures. Much better if something just broke.
I'm pretty certain you've got wear on an inner CV, maybe offside.
I made the mistake of buying aftermarket reconditioned shafts to cure it - that simply replaced a terrible vibration (like an out of balance washing machine) with something near identical to what you describe.
I ended up buying a brand new one for near side, and I'm getting some money's worth of the offside before I take the plunge.
It's worth mentioning that Alfa do reconditioned driveshafts themselves, though you need OE parts to exchange, not aftermarket.....
Anyway, I found that the near side joint I could sense the vibration was off to my left (when in the driver's seat).
Offside shaft sends the vibrations more through my backside in the driver's seat.
I also know it's not the alloys as I have a winter set that I've switched to and my vibrations are unchanged.
I'd wager that if you get a full load and luggage in the car you'll feel it worse or all the time.
Are you asking because your car has developed the side to side shakes that kick in around 2000rpm in 3rd/4th?
It's happened to me twice in 2 years and both times replacement spider/omocinetic joints sorted it. And poeple say the wishbones are cheese!
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