BRAKING ISSUE
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New User
Joined: Feb 2012
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BRAKING ISSUE
Hello Gentleman and Ladies as well,
2005 F350 Lariat Crew Cab Shortbox Superduty 6.0 Powerstroke Diesel
When i depress the brake it feels like a thump thump thump thump...
Is that a caliper or a rotor? Or is that stupidly not enough info?
I can feel it in the pedal as well, at real slow speed it feels like catch release, catch release, catch release.....
Will a bad caliper cause that effect?
Any thoughts are appreciated, thank you.
2005 F350 Lariat Crew Cab Shortbox Superduty 6.0 Powerstroke Diesel
When i depress the brake it feels like a thump thump thump thump...
Is that a caliper or a rotor? Or is that stupidly not enough info?
I can feel it in the pedal as well, at real slow speed it feels like catch release, catch release, catch release.....
Will a bad caliper cause that effect?
Any thoughts are appreciated, thank you.
Junior User
Joined: Mar 2013
Posts: 54
Likes: 3
X2 on the rotors
Whenever I let my trucks sit for longer than a couple of weeks I get that with the brakes...especially if it rained. It usually clears up on its own after a few brake applications. However, I had a truck sit for six months and I had to replace pads and rotors to get rid of the pulsating brake pedal.
Whenever I let my trucks sit for longer than a couple of weeks I get that with the brakes...especially if it rained. It usually clears up on its own after a few brake applications. However, I had a truck sit for six months and I had to replace pads and rotors to get rid of the pulsating brake pedal.
Elder User
Joined: Oct 2001
Posts: 544
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From: Jersey Shore Not Seaside!
When a vehicle sits, especially outside, it takes along time for moisture to evaporate between the few thousands of an inch gap between the rotors and pads. An iron oxide growth of less then 0,001" is all you need to develop pulsation when braking; Iron oxide is a hard material and can take some time before it is worn away unless you have a friction material compound with a high metallic, abrasive nature.
"Warped" is a bad term to use as rotors with runout do not cause pulsation unless the calipers cannot more laterally with the runout. Thickness variation in the rotors, from oxidation in this case or wear of the high runout areas of the rotor will cause pulsation.
Tires that are starting to separate will also cause pulsation when braking, and often you can see or feel the issue when going very slow without braking with intermittent twitching of the steering wheel.
"Warped" is a bad term to use as rotors with runout do not cause pulsation unless the calipers cannot more laterally with the runout. Thickness variation in the rotors, from oxidation in this case or wear of the high runout areas of the rotor will cause pulsation.
Tires that are starting to separate will also cause pulsation when braking, and often you can see or feel the issue when going very slow without braking with intermittent twitching of the steering wheel.
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amm888
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Dec 4, 2006 09:51 AM
