Steering wheel shake under braking

Post Tue Apr 15, 2014 12:53 pm

Can anyone suggest all the possible causes of steering wheel to shake under braking that is not.......

wheel bearing, tie rod end, wishbone rear bush, front ARB bush, steering column (lower) UJ, buckled wheels, alignment, brake discs, calipers, brake pads or tyres?

Cheers

Post Tue Apr 15, 2014 1:38 pm

Ball joint on the control arm?

Post Tue Apr 15, 2014 7:47 pm

fucked lollipop bush, my one was real bad, it used to be all over the place!

Post Tue Apr 15, 2014 7:54 pm

I'm think "wishbone rear bush" is actually the lollipop bush, so that's covered already.

Post Tue Apr 15, 2014 9:30 pm

im having the same problem

Post Tue Apr 15, 2014 10:37 pm

Ball joint... Unsure if the symptoms suggest this, anyone comment?

Post Tue Apr 15, 2014 11:17 pm

going for the discs myself pedal feed back some times on mine. new lines maybe as they are old

Post Wed Apr 16, 2014 12:48 am

I'm assuming from the list above that you've already checked/changed those parts............ but even so............. when I replaced my discs, the new ones were not great!!! They actually felt warped for a while - mainly vibrated when braking from higher speeds - but actually bedded in well after a bit of abuse!!!
I've also had new discs in the past that were shocking from the word go and did not bed in at all, so were promptly removed!!!

There's always scope for a new part to be worse than what came off!!!

Post Wed Apr 16, 2014 1:11 am

Mine are well worn so im going for that.

Post Wed Apr 16, 2014 8:09 am

miniblob wrote:I'm assuming from the list above that you've already checked/changed those parts............ but even so............. when I replaced my discs, the new ones were not great!!! They actually felt warped for a while - mainly vibrated when braking from higher speeds - but actually bedded in well after a bit of abuse!!!
I've also had new discs in the past that were shocking from the word go and did not bed in at all, so were promptly removed!!!

There's always scope for a new part to be worse than what came off!!!

Changed all of the above, including discs, tried a different make, but same problem.

Any other possible cause?

Post Wed Apr 16, 2014 8:10 am

miniblob wrote:I'm assuming from the list above that you've already checked/changed those parts............ but even so............. when I replaced my discs, the new ones were not great!!! They actually felt warped for a while - mainly vibrated when braking from higher speeds - but actually bedded in well after a bit of abuse!!!
I've also had new discs in the past that were shocking from the word go and did not bed in at all, so were promptly removed!!!

There's always scope for a new part to be worse than what came off!!!

Changed all of the above, including discs, tried a different make, but same problem.

Any other possible cause?

Post Wed Apr 16, 2014 8:27 am

It might be obvious but you thought about bad tyres or tracking?

Tighten up all nuts and bolts and check all of the bushes first.

Post Thu Apr 17, 2014 1:13 pm

Im thinking of going back over over old ground

Post Thu Apr 17, 2014 1:22 pm

Checked brake lines and bled the system?

Post Thu Apr 17, 2014 2:22 pm

NoTurbo wrote: Im thinking of going back over over old ground

This! You can check the disc run out by jacking a wheel off of the ground, turning to full lock so that you can see behind the wheel, then holding the tip of something like a pencil close to the disc, with your hand braced against something solid, like the strut, while spinning the wheel.
Won't be as accurate as a dial gauge, but will give an idea.

Post Thu Apr 17, 2014 3:53 pm

I would jack the front of the car up, and shake the front wheels in each plane, and inspect the various joints, including the steering rack inner drumsticks - I had a Peugeot 306 Cabriolet that failed the MOT on excessive play in one, and once a new one was fitted, it transformed the handling.

Post Mon Apr 21, 2014 7:52 pm

NoTurbo wrote:It might be obvious but you thought about bad tyres or tracking?

Tighten up all nuts and bolts and check all of the bushes first.

Yep, new tyres, different wheels, 4 wheel alignment, drop links and track rod ends.

Post Mon Apr 21, 2014 7:54 pm

NoTurbo wrote:Checked brake lines and bled the system?

Braided lines fitted, complete fluid flush, still a lovely clear goldy colour.

Speedtouch wrote:I would jack the front of the car up, and shake the front wheels in each plane, and inspect the various joints, including the steering rack inner drumsticks - I had a Peugeot 306 Cabriolet that failed the MOT on excessive play in one, and once a new one was fitted, it transformed the handling.

This is the one area I have not touched, apart from the UJ.....yet.

Brianmoooore wrote:
This! You can check the disc run out by jacking a wheel off of the ground, turning to full lock so that you can see behind the wheel, then holding the tip of something like a pencil close to the disc, with your hand braced against something solid, like the strut, while spinning the wheel.
Won't be as accurate as a dial gauge, but will give an idea.

I tried this at the local tyre fitter, no signs of warp to the naked eye, but the balancing machine was not designed for this sort of fine measurement, so abandoned it.