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Old 09-23-2012, 10:19 AM   #1
ralmfao
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Unusual and inconsistent wheel wobble

Hi,

I have an unusual wheel wobble on my 2006 Focus. It is usually at around 70mph but can be anywhere from 50 upwards.

It feels a little like unbalanced wheels. However, I recently changed all 4 tyres and the problem was the same before and after, so I'm no longer sure that this is the problem.

The unusual part is when i'm on the motorway at about 70mph, if the road has a long bend the vibration literally comes and goes as i go around the bend!!!

Any ideas?

Thanks

J


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Old 09-23-2012, 11:30 AM   #2
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Inner CV. Jack up the vehicle safely so both front wheels are off the ground, trans in N, spin the wheel/tire and listen for a high speed clicking sound like someone is running a playing card through the spokes on a bicycle wheel.

This vibration is a nightmare to diagnose. You'll feel it at steady speeds, but not any given steady speed. It will go away when you accelerate even a slight amount. It will get more noticeable when going uphill, and disappear when going downhill. It's a very annoying issue.

The CV is not done yet. I would save up the money to have both replaced at the same time regardless of which one has failed. I drove on a bad inner CV for about 100k miles before I finally tired of it. CVs can be damaged like this when installing so you should be careful how much you stretch the axle, and where you push on it.

Depending on mileage, there is also a chance that you have a bad front wheel bearing. To diagnose this one, while the car is off the ground, rotate the wheel and listen for a grumbling, roaring sound from the outer edge. The high speed clicking will come from under the car around the inner CV, and is not the same sound.
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Old 09-23-2012, 11:54 AM   #3
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That sounds expensive :(

J
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Old 09-23-2012, 12:26 PM   #4
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IDK about axle repair on your side of the pond, but I'd expect it to translate about the same like it does on most things. A single axle at a parts store is $150 or so, and it costs about $250 to have a shop change one, but only $400 for both typically. You should have plenty of time to shop around after you diagnose the problem. Make sure that it is your problem and not a wheel bearing- although wheel bearings usually vibrate at any speed.
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