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Old 21-10-2022, 10:37 AM   #1
asimplelife
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Default New AU3 Wagon front brake shudder only at 100kmh

Bought another wagon that seems to have been well looked after.
1st owner 13 years as a daily 150,000km. Looked after it probably until the last year or so then let things go a bit until trading it in.
2nd owner 7 years garaged 10,000km. Seems to have fixed all the issues he was aware of.
Car drives like new. No problems with the brakes at all up till 80kmh.
But when I take it on a longer trip, at 100kmh, then brake hardish from 100kmh, I get a shudder through the steering wheel.
This has been since I bought it a few months back, every time I do this sort of drive, and it hasn't improved.

After inspecting, the right front wheel feels much hotter than the left.
Took it to my mechanic. He says while nothing wrong, he believes the right front brake caliper could be sticking.
He thought it might come good after driving for a while, after not being driven much for 7 years. But it has not improved.

His suggestion is to replace the AU3 front right caliper from my previous AU2 wagon which I am currently stripping. I had no problems with the AU2 brakes during 2 years of driving it.

Before I spend that money, just wanting to check if there might be any other suggestions I could be trying first?
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Old 21-10-2022, 01:29 PM   #2
fordomatic
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Default Re: New AU3 Wagon front brake shudder only at 100kmh

Common problem, change the caliper over
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Old 21-10-2022, 01:33 PM   #3
asimplelife
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Default Re: New AU3 Wagon front brake shudder only at 100kmh

Thankyou...and can I also say...I am really really sorry...that I STILL haven't got that red steering wheel done yet :(
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Old 21-10-2022, 05:24 PM   #4
arm79
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Default Re: New AU3 Wagon front brake shudder only at 100kmh

If that doesn't help consider the lower control arm bushes, specially the front one.

The rubber ones are so soft they can amplify any issues with the disc. Becomes infinitely worse when the bushes are torn up and fubar.

Personally any brake shudder I've ever encountered was fixed by replacing those bushes and it instantly disappeared never to return. Never had to skim or replace a disc to solve brake shudder.
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Old 03-05-2023, 03:40 PM   #5
asimplelife
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Default Re: New AU3 Wagon front brake shudder only at 100kmh

As suggested, I changed the caliper over and problem solved.
Thanks for the assistance.
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Old 03-05-2023, 05:24 PM   #6
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Default Re: New AU3 Wagon front brake shudder only at 100kmh

If you want to future proof your brakes from doing that again, you could always change the caliper pistons to steel ones.
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Old 03-05-2023, 06:49 PM   #7
asimplelife
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Default Re: New AU3 Wagon front brake shudder only at 100kmh

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Originally Posted by PG2 View Post
If you want to future proof your brakes from doing that again, you could always change the caliper pistons to steel ones.
Thankyou. I have added that to my list of must do's. One of these will be my last IC car.
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