Wheel Shake

[T04GTR]

hi all just a quik one.

my whole car shakes when i aply the brakes at speeds above 100ks

my first thought was warpefd discs so i had them machined and it still does it just as bad

my front brakes are f40 343mm*34 thich 2 peice full floating discs(disc rattels around)

has any one had this problem before?

im getting a wheel alignment and balance tomorrow but i dought it will fix it.

it gets REALLY bad the hotter you get the brakes, but they are perfectly flat :blink

any one into motorsport may be able to help

cheeres in advanve

[Abo Bob]

Did the machining fix it temporarily or not at all?

[Snowman]

I used to and still do have this problem when I first put in new pads. I use the Ferodo's and the problem is I don't seem to be able to bed them propperly on the streets.

But when I first go to the track they initially get worse before they get better. I have heard it may be due to a surface resin build up that can occur in the slots of the rotors from the new pads but haven't had it confirmed by anyone.

All I know is that they can take a good 3-4 sessions to bed in and thats on a hard braking track like Sandown and Calder. At Phillip Island I couldn't bed them in at all.

And all this is despite me doing some heavy street stops as well beforehand. But eventually it does go away for me - although the 1st few sessions to a day on the track is damn rough in the car!

[blind_elk]

Might sound a bit silly, but have you checked all the suspension bushes (particularly castor bushes). And the wheel bearings.

[MerlinTheHapyPig]

it could be your wheel alignment, or wheel balance also.

check the run-in on your discs

[arbess]

Try tie rod ends....

[T04GTR]

Cool.

the pads on the front are about 75% worn

it has pillow ball type joints(no movment)

tie rods/rackends ok

BIG CRACK IN REAR DISC!!!

il replace the rear discs and see how we go

ps. i thought it was abit bizar that the vibration comes through the steering wheel.

[GTS-032]

if worst comes to worse and u still have no luck try changing the tyres.

know this sounds strange but i had the same issue with my 180sx but it also used to shake the wheel over 100 without the brakes applied.

[Miller the hoon]

the pistons on the calapers maybe 3 are comen on and not 4

james

[T04GTR]

hmm. i replaces the rear discs. no good.

front discs got machined $130 later and its the SAME

I dont think they did it properly

but can worn pads have an effect? (<2mm)