What’s crazy is my breaks squeak non stop very loud and the dealership. I got it from says it’s normal because high performance breaks lol
Can be right. High performance brakes shed more brake dust and the dust can cause problems. More below.
But it doesn't have to be high performance brakes, necessarily. The brakes squeak on my M-B cargo van when pulling into or out of a parking space. While the van brakes are quite adequate I don' think they qualify as high performance.
My Scat Doesn't get that much use (7K miles since Nov. 2020) but occasionally I'll hear a bit of squeak/squeal when coming to a stop.
I know I post this often but I have "cured" noisy brakes with a brake wash. I use the DIY car wash and spray down the wheels/brake hardware in the soap setting, then use the rinse setting then finish with the no spot rinse.
After the washing I drive the car and use the brakes hard enough to get them hot to ensure they are completely dry.
The washing removes the brake dust build up every where but in this context the dust build up on the piston dust boots is the key. This dust can weigh down the boots enough to cause them to interfere with the natural tendency of the pistons to slightly retract when the brake pedal is released. This retraction action comes from the piston seals and their hysteresis which tends to cause the pistons to slightly retract when the brake pedal is released.
If the pads don't pull back they rub against the rotor and after some time will cause a mild glazing. This gives rise to squeak/squeal or sounds of "rubbing" especially at low speed and when turning and when lightly applying the brakes.
My van is the worst because it is my daily driver and spends more time in stop and go driving and in all kinds of weather/road conditions.
If the brake rotors otherwise look ok then a brake wash may eliminate the noise.
I know many owners are quick to blame the diff and I'm sure in some cases it is to blame. But my Hellcat I swore had a noisy diff -- was particularly bad at speed (75mph+). And the noise sounded "unhealthy". Would have probably taken the car in for this but found another cure...
Long story short turned out to be tire noise. Had to replace the factory fitted Pirelli all season tires on the rear due to a puncture at around 13K miles. I had owned cars before which were known for tire noise so tire noise was not new to me but the tire noise from the Hellcat was quite remarkable.
The rear tires were not that worn either. Nor did they show any signs of misalignment. The rear tires in fact had the same amount of tread left as the fronts. And I never had the tires rotated since the wear was even front to rear. Roughly I'd estimate the tires were worn down to 60% tread remaining. I was probably one of the handful of Hellcat owners that wasn't that hard on tires and this includes the rear tires.
