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Vibration at 40mph


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I’m getting a vibration at 40 mph consistently.  I have all 4 new Michelin tires on my 20 Ford Fusion.  They’ve been high speed balanced.  I mention this because the dealership wants to associate this with the tires.  I’ve been told it may be the axle, but I wonder if it’s a transmission issue?   Thoughts or has anyone else had this issue?

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FWD or AWD?

 

Transmissions almost never cause vibrations at speed.  I would be looking for a bent rim first.  I'd also get the tire balanced checked at another shop.  IF the axle was bent you'd have undriveable vibrations.  Bent rims can sneak by even the best tire guy from time to time.

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Presumably, there was no vibration before the new tires.  Is the vibration from 40 mph up, or just at 40?  You indicate that the tires were high-speed balanced.  As suggested by WKelley above, perhaps look for another shop that offers road-force balancing.  Some dealers are so equipped.

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On 5/4/2024 at 8:12 PM, WKelley said:

FWD or AWD?

 

Transmissions almost never cause vibrations at speed.  I would be looking for a bent rim first.  I'd also get the tire balanced checked at another shop.  IF the axle was bent you'd have undriveable vibrations.  Bent rims can sneak by even the best tire guy from time to time.

It’s FWD.  Since I purchased it, 2 dealerships, a mechanic and the tire place have touched the tires.  I worked hope that if the rim was it, at least one of them would have noticed.  

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The vibration was there before the new tires.  I’ve had it at 2 Ford dealerships and they both want to blame it on the tires.  Thus, I got new tires.   The vibration is at just 40 mph(ish).  I’d live with it, but I have an extended warranty and want it resolved while it’s in affect.  

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To me it would be worth bringing it somewhere independent to take a look at it.  I still say it's likely a bad rim or possible bad alignment.  You'd be amazed what can get by someone when they are not looking for it.  I'm not sure how an axle could be bad, you'd have massive vibration issues or lots of clicking/clunking as well.

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