Wheel judder under braking..

[MikeP]

Im getting quite severe wheel judder under braking, but only occurs between about 50 and 60 mph - any thoughts on possible causes ?

 

[day1zero]

Warped disk poss.......or damaged tyre...check inside edge of tyres for eggs.

Hope you find it

 

[John Maddox]

In my case I clean the disc holes and this reduces the problem considerably. I also had a pair of non "N" rated tyres on the front when I bought it and changing those for Conti N2 rated and careful balancing did the trick.

As Day1 says check the tyres carefully for damage and also check for play in the wheel bearings/suspension.

Let us know how you get on as this can be difficult to cure.

 

[MikeP]

thanks for the info guys - looks like ive got some checking to do ...

Maybe a clue in that at the recent MOT, there is an advisory note about some corrosion on the discs - the car had been standing around a while at the dealers prior to me buying it ...

 

[matthewb]

I've just got my car back from Specialised Paintwork (some welding for the door-strap + fixing scuttle rust + front-end respray + rear fender respray + wheel refurb + re-conolising of leather + carpet clean) - a pretty good job, though it's got to go back in for them to rectify a few minor snags.

Since its return, I've noticed wheel-wobble at 50 - 60 mph (I take my hands off the wheel and watch it wobble) - and the wobble can sometimes (but not always) get pretty violent when braking, though this seems possibly dependent ...

• on road surface,
• on whether braking from say, 55, or braking from 70-ish
• on how hard I'm braking.

All tests done in the dry.

I'll check out the ideas posted here. Thanks to all.

 

[matthewb]

Thanks Maurice

Actually, this had occured to me too (honestly). The balancing was apparently done by OPC Reading (who are just around the corner from Specialised Paintwork) so I'd have expected a good job!

Do you think that only the front wheels would need doing, or can an imbalanced rear wheel cause the same effect?

I'll get it done asap.

Cheers
Matt the Porsche

 

[craig2105]

Couldn't help picking up on the OPC wheel balancing issue for a general ramble. Our region (19!) has a monthly meet at the Reading OPC and we recently had a demo of the tyre fitting & balancing kit. It's quite impressive - they seem to have invested in some really good kit, and the chap running it knows what he's doing. having had a set of tyres fitted this week elsewhere and two rims damaged in the process, I'll be going to th eOPC in future as I'll be much more confident in their kit. For info, I believe the tyre fitting work is contracted out to an external company - can't remember who though I'm afraid, but they should take a look at the problem if you ask them. Let us know the outcome.

 

[Johnny C]

I had this a while back. First time it happened I thought I had a puncture and pulled onto the hard shoulder. It got worse. Then the steering rack went. I got the steering rack replaced a few months back, and it's disappeared.