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Old 07-21-2019, 09:02 AM
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Power Stop Brake Question

I installed Power Stop K2798-36 Z36 brake kit on my unlimited several months ago with no problems. Recently I took the jeep down a steep grade (16%) and was breaking pretty heavily. It was a short run downhill. Maybe 5 miles maximum. The brake pedal started to become spongy and I began to loose breaking power. I got off the brakes, they cooled and braking force returned.

I called power stop and they said it is normal when you overheat a z36 pad. To be honest, it seemed to me a little too easy to overheat them and I have never lost braking power with a semi-metallic (I could smell them getting hot). Is this normal? Has anyone else had this problem with a carbon-fiber ceramic pad?

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Old 07-21-2019, 10:04 AM   #2
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I would say if you were heavy on the brakes for that long it is normal. I shift down to control my speeds on long downhill stretches.
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Old 07-21-2019, 12:04 PM   #3
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You might want to check the condition of your brake fluid too.
https://www.aa1car.com/library/bfluid.gif
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Old 07-22-2019, 09:05 AM
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Thanks guys. The fluid is all good. We flushed when we installed the brake kit. I didn't think I was on the brakes too much at all, that's basically what this post is about. Just seems like they gave up on me really quick.
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Old 07-22-2019, 09:51 AM   #5
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Quote:
Originally Posted by thompsdw View Post
Thanks guys. The fluid is all good. We flushed when we installed the brake kit. I didn't think I was on the brakes too much at all, that's basically what this post is about. Just seems like they gave up on me really quick.
How old are your brake lines? They start to get stretchy after 4 years. Fluid gets hot, swells, brake line goes with it.
I guess I'm due for lines...

I have the Z36s on my JKU and they haven't experienced any fade at all. I do tow a trailer in steep hills but I have a manual trans ---- gears help the brakes.
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Old 07-22-2019, 08:27 PM   #6
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That recently happened to me. Steep down grade, power stops on the front only. Pedal got spongy and smelled. I was also down shifting but still had to brake. It was steep. Glad I am not the only one. Gonna replace with something else next time.

Not my first vehicle with power stop brakes, but first problem that I don’t want to repeat.


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Old 07-24-2019, 05:51 PM
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I agree completely. That was not a good feeling to have!

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