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Originally Posted by joey
I have stock 18" wheels and when I brake hard to a full stop I sometimes get some real strange sounds from my front brakes. Almost like metal-on-metal grinding. Maybe the noise is coming from the ABS system. I have yet to feel the usual pulsing ABS feedback in the brake pedal that I get in my other cars.
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That's probably the ABS engaging.
Unlike other cars you may have driven in the past, the modern ABS in the Chrysler 300C does not give as much pedal feedback. This was designed in because many drivers reflexively lift off the brakes when they get that feedback in the pedal, resulting in longer stopping distances during a panic stop.
Most people think the flutter they feel in the brake pedal is the result of the hydraulic pressure being released and then reapplied to the calipers. It's not. When the dump valve solenoid opens up to relieve pressure from the caliper in order to prevent the wheel from locking up, that fluid has to go somewhere. It's collected in a cylinder called the accumulator. Eventually, the fluid needs to be pumped back into the master cylinder reservoir by an accumulator pump. It is the action of that pump that you feel through your brake pedal. There's just as much drama taking place at the caliper on your new Chrysler as there was on your car 10 years ago, but much less feedback in the pedal due to improved accumulator pump design.