RPGR90s Posted December 26, 2024 Report Share Posted December 26, 2024 Hello everyone. I have a 2019 ST with 70k with the stock brake calipers. The car has been flawless and completely trouble free since purchased new. I installed new PowerStop rotors and pads about 10k miles ago and initially there were no issues, (Evolution Slotted and Drilled, Zinc Plated https://www.powerstop.com/product/po...lotted-rotors/) However, in the last 4 or 5k miles, there is some braking noise when stopping from 45mph to about 25mph. There isn't any vibration or pedal pulsing, but just an audible "hum/noise" that seems to come from the front or maybe even the front left wheel. And again, if I'm braking from say 60 or 70mph, the noise only gets loud in the 45 to 25mph range and then gets quiet again as I come to a full stop or continue to brake through that range of speed. I rotate the tires every oil change (6-9k) and everything looks fine on inspection. I also re-torque the lug nuts within 100 miles after a tire rotation and do annual brake fluid flushes. Appreciate any help. Rick Quote Link to comment Share on other sites More sharing options...
STBEAST Posted December 27, 2024 Report Share Posted December 27, 2024 I don't have an answer other than sometimes aftermarket products do not produce the same results as OEM. I have always felt that some aftermarket products are better than OEM, but most are not. Contact the manufacturer and maybe they have had similar complaints and know what the fix is. Quote Link to comment Share on other sites More sharing options...
dabangsta Posted December 27, 2024 Report Share Posted December 27, 2024 Since mine is a daily driver, I skipped the slotted and drilled rotors, but I did do the Power Stop coated rotors with ceramic pads. I was tempted to since the $110 rebate made them well under $300 for all corners, but I would probably be doing them every 18 months, which is not something I want to do. I put the Power Stop Z23 kit (slotted rotors, carbon fiber-ceramic pads) on my 2012 Fusion and I wear pads out every 30k miles, which was fine when it was my beat around weekend car, but now it is a daily driver, so next set won't be these again. Mine get noisy when others drive the vehicle for a few hundred miles. A few hard stops (which are my norm) and they stop the slight chatter and groan. That is were the slots come in (like a cheese grater heh). 1 Quote Link to comment Share on other sites More sharing options...
dolsen Posted December 28, 2024 Report Share Posted December 28, 2024 I'd have to agree with @dabangsta in that drilled/slotted isn't really the way to go. It could easily be the source of the noise, OR if you went with aggressive brake pads, those are notorious for squeaking. Frankly, unless you're racing the vehicle, hard, at a track, I would avoid drilled and/or slotted rotors altogether. Too many issues and too much wear 1 Quote Link to comment Share on other sites More sharing options...
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