ultraclyde
ultraclyde PowerDork
12/23/19 7:58 a.m.

The brakes on my 2013 F150 have started squealing like crazy when first backing down the driveway in the morning. Sometimes they do it for the first 20 feet leaving a parking space later in the day too. Once you get a normal stop in, like at the end of my street, they're fine. All pads look fine and have a LOT of pad left on them. They are all labeled Motorcraft and dated 2018 on the back, judging from the wear I suspect the dealership replaced them prior to selling the truck to me at the end of 2018. Rotors look fine too.  It's been fine for the year I've had it until like the last month or so.

I bought a set of Stoptech pads for the front before checking the actual wear level. I suppose I can just pick up a set for the rear and do all of them, but I hate to take out brakes that are still 90%. But it's getting really annoying and I hate for my vehicles to sound that ratchet. 

Anyone else have a set do this? Any ideas? Maybe smear the back with the disk quiet stuff? Or just ignore it?

AngryCorvair
AngryCorvair GRM+ Memberand MegaDork
12/23/19 8:00 a.m.

Seasonal allergy, due to temperature and humidity and perhaps salt in the air if you live in a salting state.

What to do? Best bet is probably to clean everything, then spooge some disc brake quiet where the pad backing plates contact the pistons and caliper fingers.

or just wait it out.

bobzilla
bobzilla MegaDork
12/23/19 8:02 a.m.
AngryCorvair said:

Seasonal allergy, due to temperature and humidity and perhaps salt in the air if you live in a salting State.

+1. All of our cars start doing it after rain/snow/humidity/fog etc. After the rust is cleaned off with that first stop they're fine. 

Keith Tanner
Keith Tanner GRM+ Memberand MegaDork
12/23/19 8:16 a.m.

Man, I was going to suggest bedding them. That’s what I do when slightly-too-aggressive pads start talking on a gently driven street car, but that’s for a totally different reason than that postulated by Angry. Still, a three quarter ton that’s been dealing with a light load and slow speeds for a while might  fall into the same category.

 The good thing is that it’s fairly easy to do :)

AngryCorvair
AngryCorvair GRM+ Memberand MegaDork
12/23/19 9:12 a.m.

+1 to Keith’s suggestion. Can’t hurt. 

ultraclyde
ultraclyde PowerDork
12/23/19 9:44 a.m.

Flash rust/ humidity was my first thought too. But it doesn't seem to be connected to weather, I'm in GA so we in the last month we've had everything from 20* to 80* and it's always humid. No salt either.

I'll try bedding them. Might not help but it's always a fun way to scare the neighbors.

bobzilla
bobzilla MegaDork
12/23/19 9:51 a.m.

Intake brown cookies to the rotors before rebedding them. Give the pads a chance 

Recon1342
Recon1342 HalfDork
12/23/19 2:02 p.m.

In reply to bobzilla :

Whaaa???

psychic_mechanic
psychic_mechanic Dork
12/23/19 2:32 p.m.

Check to make sure the e-brake actuators aren't binding causing the parking brake shoes inside the rotor to drag. Even if you don't ever use the parking brake they usually make noise first backing up in F150's of that vintage.

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