Brake Issue/Noise - Ford Mustang Forum
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post #1 of 12 (permalink) Old 07-28-2019 Thread Starter
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Brake Issue/Noise

I have a 2014 Mustang GT that has Wilwood's all the way around. They started squealing when coming too a stop so it was recommended by a local shop to replace the rear pads as they were worn. I also just went ahead and had them do the front pads as well. They replaced them with Wilwood's BP10 which is what Wilwood recommended. Anyways, I have the car back now and it's making a groan/moan sound after you release the brakes after they have warmed up. I can't tell if it's coming from the front or back as my loud exhaust is making it difficult to determine. It did not do this with the old pads. It does not do it everytime you release the back, I would say about 50% of the time. The shop said to "break" the pads in for a while and see if it goes away. I've always been told any break noise is bad and it should be check out. The best way I can describe this moan is it sounds like if you are pushing a heavy piece of furniture against a hard floor slowly and it makes a moan/groan sound from the friction. Or if you are driving down the highway and drive over those noise strips they have on the side of the road that makes your tires make that moan sound. I'm not a mechanic so I'm going to have to take this to someone, I guess my concern is if this is normal after a pad change or if something is truely wrong?

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post #2 of 12 (permalink) Old 07-28-2019
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did the shop provide the "bedding" instructions? Wilwood link:
https://www.wilwood.com/techtip/techpadbedtip


It might not cure it, but I would try bedding the brakes before I got too worried about the noise.


The other potential easy thing to try is to make sure the calipers are clean and pistons are moving freely; also put some grease on the back of the pads (between the pad and the pistons) . . . hopefully the shop did this when they changed the pads.

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post #3 of 12 (permalink) Old 07-28-2019
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If a local shop installed the pads, it shouldn't make any noise. It sounds like a warranty item and if you do anything yourself, you could void any possible warranty repairs.
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post #4 of 12 (permalink) Old 07-28-2019 Thread Starter
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They told me they ran the pads threw a heat cycle while they were testing it for driveability. I don't know if they put grease on the pad of the pad, I do know they told me they put anti squeak on back of the pads to help in the future. The wilwood pads do not have any shims on them, Another guy told me to order some shims and have those installed. I have ordered some shims and plan on calling the shop again on Monday to see what they want to do. I've never heard a brake make this type of noise before.
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post #5 of 12 (permalink) Old 07-29-2019
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I think "anti squeak" is a fancy name for grease, sounds like that should be all set.


If the old pads had shims on them, they should have been re-used with the new pads; not sure why the new pads would need them if the old ones didn't.



I am not exactly sure what "threw a heat cycle" means, but it does not sound like a complete bedding procedure. If it was my car, I would complete the whole procedure per the instructions at the link that I posted, before going on to more difficult and expensive things. It will take about a half hour or so, but you do need a stretch of road with very little traffic where you can speed up and slow down a lot, like it says in the instructions in the link.
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post #6 of 12 (permalink) Old 07-29-2019
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Try Backing up and applying the E-Brake a few times, it sounds almost like the noise mine made when I put brakes on the rear, the adjusters might not be all the way out on the parking brake.

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post #7 of 12 (permalink) Old 07-30-2019 Thread Starter
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Quote:
Originally Posted by JBert View Post
I think "anti squeak" is a fancy name for grease, sounds like that should be all set.


If the old pads had shims on them, they should have been re-used with the new pads; not sure why the new pads would need them if the old ones didn't.



I am not exactly sure what "threw a heat cycle" means, but it does not sound like a complete bedding procedure. If it was my car, I would complete the whole procedure per the instructions at the link that I posted, before going on to more difficult and expensive things. It will take about a half hour or so, but you do need a stretch of road with very little traffic where you can speed up and slow down a lot, like it says in the instructions in the link.

I found on Wilwoods site regarding the bedding procedure. I did this Sunday evening as close to their recommendations as I could. It did not fix the moan/groan however. I will try the ebrake thing tomorrow and see if that changes anything. I'm thinking maybe the caliper is not fully releasing for some of things I've read on the internet. In regards to the other comment on the shims. The pads that was on did not have shims.
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post #8 of 12 (permalink) Old 07-31-2019
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So, unless I misread the post, you mentioned new pads but didn’t say anything about the rotors. I’m assuming they were resurfaced when the pads were replaced. If not, that’s a problem, and a strong possibility for groaning noise.

If this was all done as it should have been, I would return the car to the shop and have them listen to the noise as you demonstrate. Non-bedded breaks shouldn’t be super noisy, but it’s not unusual for some slight groaning. Also, If chemicals got on the surfaces while installing, creeks and groans do happen sometimes.

If you allow the car to creep with a partially applied break. For instance... setting at a red light on a decline, and slightly releasing the break peddle to allow the car to creep forward a little. A little groaning there means nothing much, and could be considered normal. Demonstrate the noise to the shop’s technician, and get his take on it. A quick inspection won’t cost them more than a few minutes to confirm a problem, or put your mind at ease...
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post #9 of 12 (permalink) Old 07-31-2019
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Question,Are the brakes HOT after a normal drive,is one brake hotter than the rest.That will tell you if one or all of them are dragging,or not releasing as they should.Just a thought.
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post #10 of 12 (permalink) Old 08-03-2019 Thread Starter
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They only make the sound after they get hot. I can't really tell if one is hotter then the other, If I put my hand up against them they just feel hot. I finally got an appointment to the shop that put them in later next week as they are very busy. My best thought is a caliper is sticking and not fully releasing right away as it's really only doing this right after you release the break and begin to roll. So i'm believing a pad might be rubbing against the rotor. Regarding the other about the rotors. They took sandpaper and scuffed the rotor. These rotors are straight and in perfect condition, No reason to resurface or replace.
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post #11 of 12 (permalink) Old 4 Weeks Ago Thread Starter
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I'm bringing this back up again. The groaning is now gone, However not the brakes squeal after they heat up and are braking around town. It does it at about 20 mph down to a stop with light to medium pedal pressure. If you push the pedal down hard, The squeal goes away. I've had this to various shops now and have spent an arm and a leg as we've had pad replacements, two rotor replacements that weren't even warped and various inspections. I've about given up with this stupid car and these ****** Wilwoods. Would I be better off having them take this crap off and put on a powerstop kit? I don't even drive the car anymore because of these noisy brakes and debating just selling it instead of putting more money into the brakes.
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post #12 of 12 (permalink) Old 3 Weeks Ago
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Are you using Wilwood’s street pads? Did you contact them.


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