UNTS1

I was driving at about 80kms last night and a dog or fox ran across the road, I instinctively slammed on the breaks and I didnt realise but my wheels must of locked up for about 30 metres, I looked back and I could noticably see smoke. Anyway I start to drive and it feels like my tyres have a flat spot because the car shakes with each rotation of the wheel and the noise gets faster with speed, but it could be something else?

Could it be the diff or axels that are causing the problem?
Could it be a flat spot in the tyres?
What else could be the problem with the car?

1981 Shark

I would check to see if you ran over something that is lodged in the tire or if a belt sprung out of the tire. You may also have thrown a weight off of one of the tires, causing it to be unbalanced.

UNTS1

What do you mean by thrown weight off one of the tires, causing it to be unbalanced?


I checked the tires, nothing it lodged in the wheels.

Stan.Shaw@Excell.Net

Sounds like you flat spotted them to me, 30 meters is a long way.

1981 Shark

The weights that are placed on the weels when balancing them. If one came off, that would make a huge difference. May not be the problem, but one more place to check and eliminate.

Stan is right, though, 30 meters is a long way to have them locked up.

UNTS1

yeh thanks for the advice, I've never locked up my breaks before and I normally push down on them pritty hard. I guess just because the dog was a real surprize I must of just panicked and slammed down without realising how much pressure I put on.

danglerb

What does "shakes" mean?

A flat spot I would expect a clip/clop noise and a once per rev impulse type of vibration.

If much more or much different is going on, I would want it looked over carefully before driving it.

30 meters could really damage a tire too, a LOT of heat in one spot. Depending on the tire etc of course.

danglerb

That panic reaction is 100% normal, and also the reason for taking a good driving class to unlearn (on disposable tires

UNTS1

By shakes I mean like a bumping, it feels like im driving on a cracked/uneven road. It isnt really noticable with music on in the car, but if ur in the passenger seat and ur feet are touching the floor under the glovebox you can feel the vibration in your feet. At first I thought I ran over a nail because I have done that before and it gave a similar effect

Imo000

Sounds like the tires are flat spotted. You can try putting them on the back and burning them off but at the end you'll probalby have to replace them.

Mike Frye

Couldn't it also be damage to the disks?

1slo928

I think you flat spotted your tires You might want to check your front tie rod ends. Could one of the rear bushings been pulled apart? this is an older car pre 86 being that it doesn't have ABS any decent tire shop can inspect for suspension damage I would try getting estimantes rom a couple just to be sure ask them to show you what they find if something is loose they won't need to try and convince you the part is bad you will know check the bolts for obvious sign of tampering if you can't watch them work on the car from the start most shops see $$$ when a 928 pulls up.

Chris

Charley B

Jack the car off the ground and spin each tire with a little brake pressure and with out. If no problem, then issue is with a tire or tires. Feeling it on your feet on the passenger side would point to a rear tire on that side of the car.

Imo000

Just take the car to a tire shop, they know how to inspect for flat spots.

JG928S4

If it is just the backs a big burnout may help get them back to spec. I had a similiar situatiion in my Toyota Seqouia and warped the rotors as well.