Shimmy when driving at high speeds 75 to 80 mph

Tiny
MROULET1
  • MEMBER
  • 1999 CADILLAC DEVILLE
  • 4.6L
  • V8
  • AUTOMATIC
  • 106,000 MILES
That happen about every 4 seconds. So it will ride smooth at first then every 4 to 5 seconds it will happen.
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Friday, November 22nd, 2019 AT 11:24 AM

7 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,005 POSTS
Hi,

Does this happen at any other speeds? Have you inspected the tires as well as have tire balance checked? Also, when you feel the shimmy, is it in the steering?

Let me know.

Joe
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Friday, November 22nd, 2019 AT 9:38 PM
Tiny
JIS001
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  • 3,408 POSTS
Hi, just wanted to jump in here really quick. If the vibration only happens when you accelerate at those speeds then I would suspect bad axles. When the inner joints start to bind it will cause the vibration and majority of the time it happens only on highway speeds.
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Friday, November 22nd, 2019 AT 10:49 PM
Tiny
MROULET1
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  • 74 POSTS
Yea, it’s in the steering.
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Saturday, November 23rd, 2019 AT 11:16 AM
Tiny
JACOBANDNICKOLAS
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Have you had the tire balance checked? Also, it could be an axle joint starting to go bad. Does it happen regardless if you are accelerating, maintaining speed, coasting, or braking?
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Saturday, November 23rd, 2019 AT 5:16 PM
Tiny
MROULET1
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  • 74 POSTS
It just happens at those speeds and the faster I go the worse it gets. I work with tires, I don’t believe it’s a balance issue.
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Monday, November 25th, 2019 AT 10:50 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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Okay, then I have to suspect an issue with a steering component or one of the axle joints is going bad. Have you had the chance to check those components? Also, are there any sounds associated that may indicate a bearing issue?

Here are a few links you may find helpful regarding axle joints:

https://www.2carpros.com/articles/how-a-cv-joint-works

https://www.2carpros.com/articles/symptoms-of-a-bad-cv-axle-joint

https://www.2carpros.com/articles/replace-cv-axle

Joe
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Monday, November 25th, 2019 AT 6:27 PM
Tiny
MROULET1
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  • 74 POSTS
Just want to thank you for the help. It was just tires. Just put them on yesterday and it rides like a Cadillac!
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Saturday, November 30th, 2019 AT 8:24 AM

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