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Brake hum when backing up after a rain storm #5354280 02/19/20 09:54 AM
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vortex Offline OP
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Will lubrication along the brake pad shoe rails solve an issue with the brake pads humming when being applied and backing up after a rain storm? (The brakes quiet back down after driving a short distance going forward)

Re: Brake hum when backing up after a rain storm [Re: vortex] #5354317 02/19/20 10:36 AM
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mclasser Offline
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That's common. Moisture on the pads/rotors will create funky noises until everything dries up.


2018 Hyundai Elantra VE
2013 Honda Pilot EX-L 4WD
2002 Honda Accord EX-L

Re: Brake hum when backing up after a rain storm [Re: vortex] #5354318 02/19/20 10:37 AM
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ragtoplvr Offline
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surface rust on the rotor will make various funny sounds depending on brake pad composition.

Rod

Re: Brake hum when backing up after a rain storm [Re: vortex] #5354428 02/19/20 12:24 PM
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JTK Online Content
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If anything, I would think putting some brake grease on the backs of the pads at the metal/metal contact points might help.


2019 Nissan Pathfinder SV
2017 Ram 1500 4x4, 3.6L.
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Re: Brake hum when backing up after a rain storm [Re: JTK] #5354484 02/19/20 01:27 PM
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Originally Posted by JTK
If anything, I would think putting some brake grease on the backs of the pads at the metal/metal contact points might help.


Certain types of friction material are more susceptible to moisture. No amount of grease will fix this. Glazing on the rotor surface can also be a contributing factor.


2011 Toyota Prius 1.8L - 206K - Valvoline Premium Blue Restore 10W-30
2007 Honda Accord 2.4L - 144K - Valvoline Premium Blue Restore 10W-30
Re: Brake hum when backing up after a rain storm [Re: vortex] #5354557 02/19/20 02:52 PM
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meep Offline
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^^^ agree.

Another thing I've run in to: brake shoes/pads exposed to leaking brake fluid get very grabby when wet. They will chatter or lock up with minimal pedal pressure. Fixing the leak and using new pads/shoes is the fix there.


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