sexual harrassment panda I see a red door and I want to paint it black Donating Members 5,919 Member For: 15y 27d Gender: Male Location: Far north queensland Posted 29/09/12 09:16 PM Share Posted 29/09/12 09:16 PM You'd notice a stuffed hub under all driving conditions. Not just braking.I'd be doing lower control arm bushes as already suggested.defs do the lower control arm bushesI was more thinking along the lines of poor fitment of brake to hub, not a stuffed hub. Dial gauge would be an easy check Link to comment Share on other sites More sharing options...
Guest XR09 Guests Posted 29/09/12 10:22 PM Share Posted 29/09/12 10:22 PM The fraud lower Cont. bushes can look ok to the eye, but be worn out....make sure they have a good check.Or just jack your car off the ground every night and the old bushes will be good for another 50k's....just kidding. But I have heard this so often...grind discs and it goes away for a while then comes back.....must be pretty squishy bushes to begin me thinks. Link to comment Share on other sites More sharing options...
discostig Manual mode ________________________ All day, erryday Donating Members 13,798 Member For: 16y 11m 29d Gender: Male Location: Probably above atmospheric pressure Posted 29/09/12 11:28 PM Share Posted 29/09/12 11:28 PM My shudder was mostly cured by new bushes at front and then changing pads sorted the little remaining shudder out (somehow). Also had DBA4000s. Never been machined, now no shudder and I do a LOT of kms. Link to comment Share on other sites More sharing options...
Jonno Member 79 Member For: 18y 3m 14d Posted 01/10/12 04:36 AM Author Share Posted 01/10/12 04:36 AM Thanks all for your advice. I'll go for the lower control arm bushes, and another set of DBA4000s. Link to comment Share on other sites More sharing options...
sexual harrassment panda I see a red door and I want to paint it black Donating Members 5,919 Member For: 15y 27d Gender: Male Location: Far north queensland Posted 01/10/12 04:38 AM Share Posted 01/10/12 04:38 AM might as well do all the front end bushes at once Link to comment Share on other sites More sharing options...
bjcrown Donating Members 182 Member For: 19y 1m 3d Posted 01/10/12 12:20 PM Share Posted 01/10/12 12:20 PM My shudder was mostly cured by new bushes at front and then changing pads sorted the little remaining shudder out (somehow). Also had DBA4000s. Never been machined, now no shudder and I do a LOT of kms.might as well do all the front end bushes at once+1 Agree Link to comment Share on other sites More sharing options...
bjcrown Donating Members 182 Member For: 19y 1m 3d Posted 01/10/12 12:22 PM Share Posted 01/10/12 12:22 PM Diff bush.Also front control arm bushes and brake booster pushrod length." brake booster pushrod length"?? How does one check and fix this???? 1 Link to comment Share on other sites More sharing options...
NAKKAS Member 21 Member For: 13y 7m 25d Gender: Male Location: melbourne Posted 23/10/12 09:28 AM Share Posted 23/10/12 09:28 AM New front DBA 4000 rotors and Bendix pads, together with new rear disks and pads have not fixed my brake shudder problem. The shudder returns every 4,000 to 5,000 kms. Each time it does I have the front disks machined on the car.I live in the inner west of Sydney, and am hoping that someone can recommend a brake expert who can fix this problem once and for all.Thanks for your help. John.callipers need to be greased on the sliders (no grease causes warped rotors on standard cars) works a treat for me Link to comment Share on other sites More sharing options...
NAKKAS Member 21 Member For: 13y 7m 25d Gender: Male Location: melbourne Posted 23/10/12 09:36 AM Share Posted 23/10/12 09:36 AM callipers need to be greased on the sliders (no grease causes warped rotors on standard cars) works a treat for meit seems people change pads and get no shudder for a while or machine discs and also no shudder for some time,all your really doing is taking your brakes appart, lossening .the callipers a bit and this is why it goes away for a while.Try to unbolt the callipers and remove the pads,then use high temp waterproof grease on the sliders,carfull not to get grease on ya discs or pads Link to comment Share on other sites More sharing options...
Smoke them tyres Member 557 Member For: 16y 11m Gender: Male Location: Brisbane Posted 25/10/12 12:53 PM Share Posted 25/10/12 12:53 PM (edited) The fix is in the "Brake Shudder Issue" topic that is pinned to the top of this Brakes section.....37 pages is a bit long though. My reply is in there somewhere.To cut it short though.......The way to sort this is to change the front suspension bushes to polyurethane.....particularly the upper control arm ones. (although it would be best to change all of them in the front end....uppers and lowers).These poly ones have increased durometer (hardness), and more positively locate the suspension and resist fluctuation/pulsation under load.Once it starts under braking, it will continue until the minor oscillating load is released (which will be impossible given the softness of them). They are in NO WAY self damping.Basically, the rubber bushes compress and release with any small irregularity, either from any minor imperfection in disc runout or road surface. They are WAAAAAAY too soft.The wheel therefore experiences minor speed fluctuations with all this fore and aft flapping about, whilst the car experiences a more gradual load. The difference is the issue you describe.The FG ones are even voided on the front upper control arms. Introducing a failure point to "overflex" and tear. Hmmm. All in the name of a quiet ride.Unfortunately, ALL manufacturers are at it.Also, bushes can "look good" on the outside, but that tells you nothing of their ability to do the job asked of them. It just means they are not torn or perished.The lower control arm bushes symptom is increased inner tyre wear under braking (toe out under load).The upper control arm bushes symptom is brake shudder.If you can get a hold of the original bushes once they are removed, you will be surprised how soft and flexible they are. And this is meant to support a 1700kg car??????Can all manufacturers please start to use a more technoligically advanced material. Edited 25/10/12 01:02 PM by Smoke them tyres Link to comment Share on other sites More sharing options...
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