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Thread: Brakes squeal when in reverse

  1. #1
    Registered Member

    Mazda CX-9

    Join Date
    Dec 2015

    Brakes squeal when in reverse

    Just changed out brakes and rotors and now makes noise when backing up


  2. #2
    Registered Member

    Mazda CX-9 Grand Touring 2016

    Join Date
    Sep 2016
    Washington, the state
    Did you use a brake caliper lube on the metal-to-metal contact points on the pads' backing plates? That's probably the source of your noise.

    Look on line for disc brake bedding or break-in procedure. That might help. The new rotors need a thin film of pad friction material deposited on them to work right.

  3. #3
    Biggie T Skinny helbigtw's Avatar
    CX-3, CX-5 & CX-9 Moderator

    08 CX-9 GT Fwd, Bose/Nav, BSM,Compass/Homelink, Pwr Lift,Tow

    Join Date
    Feb 2011
    Pittsburgh, PA
    I had this same problem when backing out of the garage with my 08' for years. It was horrible. I tried brake quiet goop on the back of the pads, smeared the stuff on the backing plate, the knuckle, all over the place to no avail. I was able to solve the issue with my latest set of rotors by using high temp siliconized grease on the caliper pins (the pin that the caliper slides on, 3/8 inch thick pin or so) That seemed to do the trick for me, although they are starting to squeak again a little, when backing out of the garage. But I've got a good amount of miles since latest rotor & pad change. The tubes of high temp siliconized grease are not exactly cheap, but worked great for me.

    08' CX-9 GT FWD
    Gray Mica with Black Interior
    Nav/Bose/Sunroof/Bluetooth /Rack&Crossbars/BSM/Pwr Lift/Homelink Mirror/Tow Pkg/All Weather Rear Mats
    K&N drop-in filter/Centric E-Coated rotors & Centric Posi-Quiet Ceramics /2 Yakima ForkLift Bike Trays/ Weathertech front mats
    Tires: Nitto NT421Q
    Oil: Mobile One Full Synth & Mobile One Extended Performance filter
    Problems to date: Blower motor relays replaced once, intake manifold rear brace was missing from factory build, headlamp motors weak, windshield wiper plastic cap, rear strut leak.
    Mileage: 100k
    Location: Pittsburgh, PA
    Job: Material Damage Adjuster


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