Brake Pedal Feedback - JeepForum.com
 
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post #1 of 8 Old 08-04-2020, 12:44 PM Thread Starter
h1driver
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Brake Pedal Feedback

Hey there Jeepers- gotta question about something that really has me stumped... Used to drive my ‘06 LJ Rubi daily, and had no issues. Have driven it little over the past 3 or so years bc my daily commute got so long... When I would drive it, I started getting hot brakes (just typically just one corner, but it wasn’t always the same corner) and poor stopping ability. Now I am getting feedback in the brake pedal when applied; not light feedback, but the pedal pushes back at me pretty hard and repeats cyclically...

Already spoken (emailed with MrBlaine about big brakes), and am ordering to help stop this thing since the stock brakes are just inadequate for 35s. Is there anything else I should be looking at to help with the pedal feedback? Is that a booster issue? Vac leak? Proportioning valve?? I’m at a loss...

Help!!!


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post #2 of 8 Old 08-04-2020, 05:34 PM
Mousejockey
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Rotors are "Out of round" or warped.
Remember the old records? When they warped you would see the needle going up and down? Same thing here, Heat has warped the rotors, As the high side comes around it pushes the pad/caliper piston in, thus pushing the fluid transmitting all the way to the brake pedal. Shaking of the steering wheel hints at it being the front rotors, shake in the seat of your pants hints at rear rotors.
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post #3 of 8 Old 08-05-2020, 05:17 AM
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Blaine can tell you everything you need to know.

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GOT IT BACK 6/17. 03' Rubicon/Zone 4.25" combo lift with 4" lift coils up front/Zone hydro shocks/5.13 gears/35" Mickey Thompson MTZ P3 tires/Black Magic brakes. Jeep #17 & 19.
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post #4 of 8 Old 08-05-2020, 08:39 AM Thread Starter
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Thanks guys - Rotors being warped didn’t even cross my mind... I guess the last time I drove it, I didn’t even feel it so that didn’t cross my mind... Makes sense regarding the cyclic nature of the feedback...

Blaine is an absolute resource; a walking, talking encyclopedia of brake related knowledge.

On a diff note, Big Brakes and rear BMB setups ordered. :thumbs up:

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post #5 of 8 Old 08-05-2020, 01:59 PM
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Blaine can tell you everything you need to know.
Haven't seen Blaine on here in some time.

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post #6 of 8 Old 08-05-2020, 07:53 PM
Jerry Bransford
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Blaine is gone elsewhere. Your rotors are very likely not warped. Really. Think washboard dirt roads. From improper braking technique like always braking too gently (think limousine stops) or keeping the brake pedal held down firmly when stopped at red lights when the brakes are hot. That can cause a transfer of brake pad material to the rotors which can build up in a pattern like a washboard road. That will cause a pulsating brake pedal as the pads encounter the washboard buildup on the rotors.

Braking very aggressively at regular intervals and reducing pedal pressure when at a stop can stop pulsating brakes. I used to have regular issues with pulsating brakes but not since Blaine explained why it was happening. It has been 15-18 years since I saw the light and haven't experienced the problem since.

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post #7 of 8 Old 08-05-2020, 11:36 PM
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If he is replacing his brakes< he is either replacing the rotors or resurfacing the ones he has. Either way the issue should be solved
Unless he has a bad hub bearing, bent flange or build-up on the hub
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post #8 of 8 Old 08-17-2020, 09:04 AM Thread Starter
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Originally Posted by Jerry Bransford View Post
Your rotors are very likely not warped. Really. Think washboard dirt roads. From improper braking technique like always braking too gently (think limousine stops) or keeping the brake pedal held down firmly when stopped at red lights when the brakes are hot. That can cause a transfer of brake pad material to the rotors which can build up in a pattern like a washboard road. That will cause a pulsating brake pedal as the pads encounter the washboard buildup on the rotors.
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Originally Posted by Jerry Bransford View Post
Braking very aggressively at regular intervals and reducing pedal pressure when at a stop can stop pulsating brakes. I used to have regular issues with pulsating brakes but not since Blaine explained why it was happening. It has been 15-18 years since I saw the light and haven't experienced the problem since.


Interesting – Makes sense to me… I guess it still begs the question as to what is causing them to get hot initially?? Just regular stopping? Is that a byproduct of overworking them to stop the vehicle against increased torque applied by the larger diameter, heavier tires??

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If he is replacing his brakes< he is either replacing the rotors or resurfacing the ones he has. Either way the issue should be solved. Unless he has a bad hub bearing, bent flange or build-up on the hub


I hope so… (solving the issue, that is).

This whole process (and the expense) is raising a new question… I’ve been having hot brakes for some time. I have had them completely lock up in the front twice; once each side. Then I started having a hot brake in the rear (always the passenger-side). Now I’ve got the pulsating pedal... The washboard road example explains that pretty well; Thanks Jerry

Is there a causal issue that I’m missing? As I prepare to pull the front apart and replace outer Cs, Ball Joints, Unit Bearings, Rotors, Calipers, and U-joints (might as well replace the ball joints and U-joints while it’s all apart, right? ). And as I prepare to replace calipers and rotors in the back, I can’t help but think…

AM I MISSING SOMETHING?!?! Am I spending all of this time and money, just to have the same problems (hot brakes) because I missed the cause?? Or is the cause just old, over-worked brakes?? Thoughts? Is there something else that it could be?

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