My wife lost power in her Volvo on a recent trip. The car still would go, but slowly, and if she stopped completely, she said it would stall out. She took it to a mechanic that I found on Google in Portland, Ore, and they couldn't find anything wrong with it, other than they said it needed a 100,000 mile tune up. They did that, and things seemed to work.
About a week later, we started up the car one morning, and it was lurching. We decided to drive it around a little while to see if it would get better or worse, and it went away in about a minute.
Today, after driving around all day running errands, it apparently started up with the loss of power thing again, so now it's back at the shop, but this time, our regular mechanic.
I'm wondering if this could be related to a 'whirring' noise that has become more prevalent. I have a suspicion that the whirring is related to the differential, but could be something else? The noise is directly related to vehicle speed, independent of the RPMs. Sounds like we have giant swamp tires on it or something. We just got all 4 the tires replaced 2 days ago, as the front tires had completely warn down in one year with non-rotation (about 25k miles).
No messages are being displayed on the dash.
Could the lurching be a differential thing, or is it a whole other issue??
What happens when a differential goes out??
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