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Spontaneous shake in rear if car

Tiny
GD123
  • MEMBER
  • 2010 FORD MONDEO
  • 2.0L
  • TURBO
  • 2WD
  • AUTOMATIC
  • 280 MILES
I brought my car to have the axle/wishbone bushes changed.
The car now has a spontaneous shake in the rear every now and then (at least once per journey).

The mechanic said he noticed it and pointed to a a part in the car he believed may cause it.

But this did not happen before I got him to fit the bushes.
Did the mechanic perhaps make a mistake and is now trying to pawn it off? There was nothing wrong with the rear stability beforehand and I can see a noticeable displaced/crooked part. What do I do?
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Thursday, April 1st, 2021 AT 11:51 AM

8 Replies

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
Do you know what he is saying the part that needs to be replaced now is?

Does this happen when hitting a bump? It sounds like it could be a bushing issue if it was installed incorrectly or the wrong part but based on this info it is hard to know for sure.

Normally these things are not intermittent when something is bent. Basically once it is bent it will cause the issue all the time.

I attached a picture of the rear suspension below. Can you tell us what bushings he replaced and if you see the part that he is blaming now?
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Friday, April 2nd, 2021 AT 6:44 PM
Tiny
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He replaced the rear axle/wishbone bushes. The part that is damaged looks similar to part 8 on the diagram. Looking at videos it seem to be the part that's jacked up during the process of changing the bushes. The bolt connecting it to the wheel is bent looking as if forced back in. The wobble is spontaneous and happens if hitting uneven surfaces or on tight bends. Thank you for your help! It's much appreciated.
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Saturday, April 3rd, 2021 AT 6:15 AM
Tiny
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The wheel is also noticeably uneven as it sticks out more at the lower end.
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Saturday, April 3rd, 2021 AT 6:16 AM
Tiny
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Okay. You mentioned a video but I did not see one attached. Can you just get a picture of what is bent including the wheel? Clearly if you can see the wheel is not even then that is the issue.

So if number 8 looks like it is the item that is bent then that would make sense why this happens when you hit bumps because this is what absorbs the shock when you hit them.

Can you get a picture of this as if this started after he replaced these bushings then it may be something he did but that would only be if he installed it upside down. He would not have bent anything when installing it. Thanks
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Saturday, April 3rd, 2021 AT 7:14 AM
Tiny
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See attached the picture of the wheel and the part that seems bent and may be causing the issue, thanks so much.
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Saturday, April 3rd, 2021 AT 7:57 AM
Tiny
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That wheel is not as drastic as I was imagining so thank you for the picture. However, that is leaning in a bit at the top and if this is the same wheel that this shock is on in the video then that is definitely something that needs to be fixed even if it doesn't fix this issue but I suspect it will.

That shock is not positioned correctly as it should be equal on both sides as shown in the picture below. Plus you can see how the bushing is squeezing out the one side. So this is not correct and needs to be fixed.

Thanks for the pictures. That really helped.
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Saturday, April 3rd, 2021 AT 7:44 PM
Tiny
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Perfect thank you so much for your help. Yes, the wheel doesn't look too drastic but the wobble itself is very noticeable whilst driving. I will return this to a mechanic to be fixed. The other mechanic that had fitted the bushes wishbone/axle bushes obviously didn't reassemble the parts as he should have. As this was not an issue before I brought the car to him. Thanks again for the information and I will update whether the issue is resolved. Thanks
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Sunday, April 4th, 2021 AT 12:02 AM
Tiny
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Great. Thanks for this update. Yes, please let us know what happens with this. I am sure that will help others as well as I am curious how this one turns out.
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Sunday, April 4th, 2021 AT 6:32 PM

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