vibration through steering wheel on braking
Discussion
Kenny Powers said:
McWigglebum4th said:
Warped discs are very very rare.
Pad material pickup on the discs is far less rare. This gives different friction rates around the disc giving a judder through the steering.
No doubt a thousand experts will be along soon to say I am wrong
Pretty much exactly what I was about to post. Much more likely to be material pickup than warped rotors.Pad material pickup on the discs is far less rare. This gives different friction rates around the disc giving a judder through the steering.
No doubt a thousand experts will be along soon to say I am wrong
And check the thrust arm bushes... Cold weather brings out the juddering symptoms in an instant...
Warped discs aren't as rare as you might think (depending on construction) but Disc Thickness Variation or DTV is often what causes judder. It can either be uneven brake pad deposits or disc distortion when hot causing some areas of the disc to be worn away more than others.
If it's pad deposit then doing a bedding cycle, perhaps with a hard/aggressive set of pads if stubborn, should clean it up, if it's not then the discs are effectively scrap unless you want the hassle of getting them skimmed.
Either way if you haven't been on a track day or driving fast down any big hills then your calipers likely need attention, so avoid the risk of killing another set of discs and get them rebuilt!
If it's pad deposit then doing a bedding cycle, perhaps with a hard/aggressive set of pads if stubborn, should clean it up, if it's not then the discs are effectively scrap unless you want the hassle of getting them skimmed.
Either way if you haven't been on a track day or driving fast down any big hills then your calipers likely need attention, so avoid the risk of killing another set of discs and get them rebuilt!
I think most or all possibilities have been covered in the previous replies...
Warped disks - covered on PH many times, there is no such thing. What causes vibration is usually a part of the disk that has been heated. Usually by sitting atopped on the brakes when they are hot. This causes a localised hardening of the disk which grips differently to the rest of the disk. This gives vibration. Fixed by skimming disks , replacing or sometimes if you are lucky a fair bit of heavy braking.
Suspension - just as likely as the disks IME get a garage to put it on the ramps and check your bushes, dampers. Springs etc. not that unusual to replace them on a 4 year old car depending on mileage, driving style and types of road you use.
Other things to consider (less likely) - wheel bearing. Bent alloy, brake pads low/failed.
My money would be on the disks but get the whole front end checked before spending - it only takes 10 mins for a garage to check everything.
Warped disks - covered on PH many times, there is no such thing. What causes vibration is usually a part of the disk that has been heated. Usually by sitting atopped on the brakes when they are hot. This causes a localised hardening of the disk which grips differently to the rest of the disk. This gives vibration. Fixed by skimming disks , replacing or sometimes if you are lucky a fair bit of heavy braking.
Suspension - just as likely as the disks IME get a garage to put it on the ramps and check your bushes, dampers. Springs etc. not that unusual to replace them on a 4 year old car depending on mileage, driving style and types of road you use.
Other things to consider (less likely) - wheel bearing. Bent alloy, brake pads low/failed.
My money would be on the disks but get the whole front end checked before spending - it only takes 10 mins for a garage to check everything.
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