baaderapple posted a topic in 04-07 Transmission / DrivetrainI mentioned this problem a few months back in responding to another thread but I'll elaborate on the problem. I have experienced an intermittent violent shaking of my 2007 V70R which is really unsettling. I have been experiencing ongoing vibration problems and have been trying to solve the problem for several months now. I believe the constant vibration through the steering wheel and even through the seat is a result of tires and rims (most likely). I have replaced both front half shafts and still experienced the constant vibration. To further eliminate possibilities, the mechanic removed the rear shaft for a few months. That didn't solve the vibration problem, but the intermittent violent shaking did go away. Yesterday, I had the mechanic put the rear shaft back on, and took the car for a drive on the highway. About an hour into the trip, the shaking began. It starts as a low frequency hum which builds in intensity slowly. After about 30 seconds, the whole car is shaking violently, to the extent that I cannot see a clear image in the rear view mirror as it is shaking around so much. The noise becomes a whap-whapping sound, like helicopter blades, I think coming from the engine compartment, but it's difficult to say as the noise in the car cabin is so loud it's difficult to identify the source. Engine response is very sluggish during the shaking. Slowing down or speeding up has no effect. After several minutes, the shaking slowly goes away. Any thoughts?
baaderapple replied to dneu's topic in 04-07 Transmission / DrivetrainI have an '07 manual transmission V70R and for several months now, I've experienced the same vibration under load. It starts to vibrate around 90 km/h (55 mph) and continues from there up. I feel it in both the steering wheel and through the seat. I've replaced both half-shafts, and currently the front to rear shaft is removed. Once in a while, while at constant speed, the vibration becomes much worse, kind of like a standing wave. Everything on the car begins vibrating and there is a tremendous amount of engine noise, almost sounding like a helicopter is hovering over my car. The noise seems to emanate from the engine compartment. The "standing wave" vibration will only go away after 10 minutes or so of driving, or, if I slow right down to 30 mph, not something I would recommend on a freeway. Otherwise, the vibration is constant at highway speeds, just not as dramatic. I'm really at a loss to explain this problem, and would appreciate knowing what happened with the other cars experiencing a similar problem. The Volvo mechanic thinks it could be an engine mount, but I would like to hear from others.