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New Rotors?


MiKa

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  • Member For: 18y 6m 7d
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  • Location: Melbourne, VIC

Got the new rotors put on about 20,000 kms ago, used some cheap pads (usually bendix ultimates) cause I didn't have time to go to the place I get em from and they have buggered the rotors, gettin some nice shudder action..

Will machining my DBA slotted rotors fix the brake shudder I'm getting? Or should I not waste my time and get new rotors? I'm happy with the bendix pads but are there anything else I should try?

Cheers Mike..

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  • Member For: 16y 3m 6d
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Hi Mike,

Machining will only help for a small amount of time if the root of the problem is not fixed. Who put your rotors on? shop/friend? was the runout checked after installation?

cheap pads will wither wear out quicker or not stop you but shouldn't cause shudder.

If you however have warped the rotors or created hot spots from braking a lot then throw the rotors out.

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  • Awesome...
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Got the new rotors put on about 20,000 kms ago, used some cheap pads (usually bendix ultimates) cause I didn't have time to go to the place I get em from and they have buggered the rotors, gettin some nice shudder action..

Will machining my DBA slotted rotors fix the brake shudder I'm getting? Or should I not waste my time and get new rotors? I'm happy with the bendix pads but are there anything else I should try?

Cheers Mike..

Machine slotted rotors is time consuming and will cost more than standard as they can only be done 1mm at a time without causing damage to the tool...

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  • Member For: 18y 6m 7d
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So machining will fix them? So if I get them machined and better pads it should be ok? I just dont wann go to the hassle of gettin them machined, get the new pads on and end up with the same problem 2 months down the track.. I'd rather do it right the first time..

The rotors were put on by Pit Lane and were fine for ages, but I guess they have gotten crap over time and the shudder is really annoying now.. It happens at higher speed say 80-100kms/h when I brake lightly, if I stomp on it it doesnt shudder it brakes normally.. At lower speend 50-70kms/h they are fine..

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  • Moar Powar Babeh
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What model and how many KM's? DBA's and Bendix pads are know to not get along. I'd suggest different pads and possible front control arm bushes judging by the symptons you describe

OH and I had my 4000 series rotors machined and it was no problem. Its pretty rare that you would need too remove more than 1mm when machining as the difference between new and worn out is only 3 or 4 mm

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It's a BA and around 150,000kms.. U think the front control arm bushes could be responsible? are they something I can change myself?

I've used the DBA and bendix combo for ages with no problem..

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  • Moar Powar Babeh
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No problems apart from the shudder.... :)

A BA @ 150k Kms I'd be looking at front suspension bushes. Unless you have a workshop with a press, you wont be able too change them yourself.

You could remove the parts and get the old ones removed and new ones fitted, or Get in touch with Pat (Senna_T) as I'm pretty sure Wholesale Suspension Products have exchange arms.

I'd got superpro bushes while your at it

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  • Member For: 16y 3m 6d
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Id say that most of the time after machining rotors the issue returns. If you are lucky you will get away with it. If you have access to a dial gauge you can check if the problem is with the hub or the rotor.

Edited by Paulie2256
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hiddeous, that's pretty much all from the front end, but in the rear I need a new diff bush, and Mick from Pit Lane had a look at the rear supension and saw a few other bushes that need changing also.. Yeah Super pro for sure, ideally I want to Super pro the whole car but my wallet doesnt agree with me..

Paulie, that's exactly what I dont want..

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Had a suspension place sus out whats wrong with it.. Both the front upper and lower control arm bushes and struts are worn.. Could this be the cause of the shudder I'm getting at all? Could it be making a small shudder worse, to what I'm experiencing?

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