Ok had a couple of probs on a day trip to Hervey Bay today, after the car had done over 2 hours drive I got a couple wobbles on bumpy road. Was worse when using cruise control, because if I wasn't and slowed down quickly it went away without getting too bad. Driving not using c/c I could feel it start and just back off a touch and it would go away. This went on for about 1/2 hr then went away?
Also have been getting brake pulsing off and on, can be driving and will get pulsing for 5 or 6 braking events then normal for the next couple of times. It's not disc rotors as got new ones not that long ago.
Any ideas please
Sounds like you have some parts that need replacing, tie-rod ends, trackbar bushes, ball joints, and control arm bushes could be a problem. A loose steering box may also be an issue too.
Get underneath while someone is rocking the steering wheel back and forth and feel for play and look for movement in any of these parts.
Brake pulsing, I'd look at rotors first, even though they've been replaced they could still be warped. If you've got access to a dial indicator this is an easy thing to check. You could have an ABS related issue, have you checked for codes?
Sounds like you need to check the rotors with a dial gauge. I fitted a new set of front DBA rotors last year & when I checked them with a dial gauge they had excessive runout. Turned out there wasn’t enough chamfer machined into the stud holes to allow for the stud shoulders so the rotor wouldn’t sit flat. Once I showed the DBA rep what the problem was he gave me a different set of rotors to fit which ran true on the dial gauge. The rep took the problem rotors & packaging with him so he could organise a recall.
Wow just goes to show you need to check everything and trust nothing until youve proved it.
Good detective work TR Laredo !
I think its worth the effort to give the hub where the disk contacts a good old clean up with the wire brush also.
Slotted and dimpled rotors are not immune to warping, unless they are $10,000 Ferrari Carbon Ceramic ones ! Have you had a good look at the brake calipers? Make sure there is nothing stuck in any of them like a rock or bit of highway trash.
You can also get warped rotors by over tightening the wheel nuts ie: tyre service place over tightening with a rattle gun. Whenever I go to a tyre place I always loosen off & re-tighten the wheel nuts with a torque wrench.
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Wobbles and pulsing brakes
