another squealing brake thread
Thread Starter
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Fleet Mechanic
Joined: Jun 2015
Posts: 1,632
Likes: 564
another squealing brake thread
This one has me scratching my head. Truck squeaks when only turning to the right. Dead silent when turning left. Only happens at low speeds with a slight turn to the right. If I barley touch the brake pedal it goes away. As soon as I let off the brakes or straighten the truck up it goes away. I've checked the dust shields and it's not them. New motorcraft calipers and pads (less that 2,000 miles on them). Pads coated in brake quiet. Brand new motorcraft rotors. New hardware kit (pad clips and "V" springs that keep the pads from dragging). Everything is so new; I have no idea what it could be. I was reading earlier, and some folks talked about sanding/filing the inner edges of the pads (where they contact the rotor) creating a very slight bevel and supposedly that helps. Any thoughts?
Lead Driver
Joined: Oct 2005
Posts: 6,129
Likes: 1,919
From: Ponca City, OK
Have you checked hub and rotor temps w/ an IR gun? I had a brake dragging so slightly that a temp gun was the only way I found it. It was consistently 10 or so degrees hotter than the other side. Couldn't tell it by feel but the gun picked it up. Also never hurts to flush the fluid. Unless you've changed it, it could be factory original.
Thread Starter
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Fleet Mechanic
Joined: Jun 2015
Posts: 1,632
Likes: 564
Have you checked hub and rotor temps w/ an IR gun? I had a brake dragging so slightly that a temp gun was the only way I found it. It was consistently 10 or so degrees hotter than the other side. Couldn't tell it by feel but the gun picked it up. Also never hurts to flush the fluid. Unless you've changed it, it could be factory original.
Lead Driver
Joined: Oct 2005
Posts: 6,129
Likes: 1,919
From: Ponca City, OK
Hmm, maybe time for a new stereo, so you don't hear the brakes.
Thread Starter
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Fleet Mechanic
Joined: Jun 2015
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Removed both sets of pads off the front and beveled the edges where it meets the rotor. Went for a drive and the squeak is still there but maybe not as bad. Think I’m just gonna have to live with this one. I have such odd, unexplainable and hard to solve problems at times. I think my expectations are much too high with my vehicles. 
It's a Van Gogh
Joined: Feb 2010
Posts: 7,798
Likes: 1,330
From: Elk Grove, CA
Working the pad tabs was going to be my suggestion. 
Next on my list is bending the V springs a bit to increase tension separating the pads.
After that re-greasing the slide pins on your new calipers.
Next on my list is bending the V springs a bit to increase tension separating the pads.
After that re-greasing the slide pins on your new calipers.
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Fleet Mechanic
Joined: Jun 2015
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So, living with the brake squeal is not an option. Can't stand it. @aawlberninf350 what do you mean by "working the pad tabs"? I have already greased the slide pins.
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Thread Starter
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Fleet Mechanic
Joined: Jun 2015
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Likes: 564
Recap,
Brake squeal when only turning to the right. Goes away with light brake pressure applied. When driving straight, no brake noise. And no, I did not replace all these parts chasing this noise. Truck is under a major overhaul. Noise is a product of all my hard work lol.
new parts:
New master cylinder
new brake lines
new fluid
new rotors
newer pads and calipers
new brake hardware kit
slide pins cleaned and greased
dust shields checked
I noticed when installing the brake pad clips into the caliper that one or two was a little loose. Maybe these are contacting the rotor when force is applied by turning? can these clips be tightened?
Brake squeal when only turning to the right. Goes away with light brake pressure applied. When driving straight, no brake noise. And no, I did not replace all these parts chasing this noise. Truck is under a major overhaul. Noise is a product of all my hard work lol.
new parts:
New master cylinder
new brake lines
new fluid
new rotors
newer pads and calipers
new brake hardware kit
slide pins cleaned and greased
dust shields checked
I noticed when installing the brake pad clips into the caliper that one or two was a little loose. Maybe these are contacting the rotor when force is applied by turning? can these clips be tightened?
It's a Van Gogh
Joined: Feb 2010
Posts: 7,798
Likes: 1,330
From: Elk Grove, CA
To the pad tab idea; if the tabs are slightly too large and fit too snugly into the caliper they will not retract properly. Remove any extra paint or hit the tabs with a flat file so they are no longer snug.
For the loose pad clips you might be on to the problem. I associate brake noise with shoes/pads not retracting fully, but maybe the clips are sloppy. Do you still have the originals?
I ran into both issues when doing pads on my daughters Jeep recently. New clips did not fit as well as the old ones, and one pad tab had a paint goober.
For the loose pad clips you might be on to the problem. I associate brake noise with shoes/pads not retracting fully, but maybe the clips are sloppy. Do you still have the originals?
I ran into both issues when doing pads on my daughters Jeep recently. New clips did not fit as well as the old ones, and one pad tab had a paint goober.
FTE Chapter Leader
Joined: Jan 2005
Posts: 13,087
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From: Henderson, NV
Have you tried applying a thin film of brake grease between the spring clips and the carrier and also between the pad tabs and the spring clips?
Thread Starter
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Fleet Mechanic
Joined: Jun 2015
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I have not. What kind of brake grease? Like slide pin grease?
FTE Chapter Leader
Joined: Jan 2005
Posts: 13,087
Likes: 4,699
From: Henderson, NV
Yeah. The favorite on here is the Permatex ceramic stuff. Just a thin film will suffice.
Permatex 24125 Ceramic Extreme Brake Parts Lubricant, 8 oz., Pack of 1 https://smile.amazon.com/dp/B0018PSA...P812PJSXZPY5ZW
Wow they now have a Silicone Ceramic grease.
Permatex 80653 Silicone Extreme Brake Parts Lubricant, 8 fl. oz. https://smile.amazon.com/dp/B01MTNJ0...DH1S530B4FYD14
Permatex 24125 Ceramic Extreme Brake Parts Lubricant, 8 oz., Pack of 1 https://smile.amazon.com/dp/B0018PSA...P812PJSXZPY5ZW
Wow they now have a Silicone Ceramic grease.
Permatex 80653 Silicone Extreme Brake Parts Lubricant, 8 fl. oz. https://smile.amazon.com/dp/B01MTNJ0...DH1S530B4FYD14