AnswerID: 483771 Submitted: Saturday, Apr 21, 2012 at 18:50
Peter - A major problem with virtually all new vehicles, is that, with the drive to keep weight down, this means that most disc brake rotors have been thinned down to the point, where they buckle when you hit floodwaters, and the rotors are hot.
The ventilated rotors are worse for this than the old solid rotors - but most solid rotors are pretty much on the way out, now, and ventilated rotors are fitted to about 95% of vehicles today.
Brake shudder is invariably buckled rotors. There's generaly little benefit in skimming (machining) buckled rotors, as there is so little metal to work with.
Couple that with high labour costs, and generally lowered prices for new rotors, and new rotors are generally the best bet.
The ABS system merely prevents wheel locking under heavy or panic braking. A sensor on each wheel senses when the wheel has stopped turning and releases the brake pressure to that wheel, then reapplies it milliseconds later. This process repeats until the heavy brake pressure is released.
The rotor thickness, type, condition, or amount of wear in your braking system is not measured or compensated by the ABS - the braking system is self-compensating for wear, and only when the brake fluid reaches a low level, will warning lights be activated.
Cheers - Ron.
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