Strange Brake Issue.. - JKowners.com : Jeep Wrangler JK Forum
 
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post #1 of 15 Old 03-01-2019, 05:52 PM Thread Starter
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Strange Brake Issue..

08 JKU with 2.5" lift and 33s.

Brake pads replaced around 3k miles ago. Driving today and the right front (passenger side) brake caliper started dragging and you could smell the pads getting hot, turned around and took it home.

Took wheel off and removed caliper and pads and all seemed ok, put it back together and went for a test ride and the freaking left front (Drivers side) caliper started dragging and heating up the pads just like the right side had done.

Any ideas why or what would cause this?
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post #2 of 15 Old 03-01-2019, 06:02 PM
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Are you on the original calipers? If so would imagine some funk buildup in the caliper is now in play post the pad replacement. I have lost count on what # I am on replacement wise in the rear. I have a big brake kit up front and dont have issues with those calipers at all. The stock ones are crap.

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post #3 of 15 Old 03-01-2019, 06:22 PM
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Over the years, has the brake system ever been flushed, or at least bled until new fluid comes out?
If not, corrosion on the brake pistons may be the problem. With the new pads, the piston gets pushed back to an area in the caliper that it hasn't been in years. If there is corrosion in the caliper bore, it can make the pistons stick.

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post #4 of 15 Old 03-01-2019, 07:01 PM Thread Starter
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Its the original calipers. Just strange it would drag on the right then after checking and putting it back together it started on the other side the same way..

All I did was compress the caliper and reinstall the pads. What is the possibility of both calipers failing at the same time??
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post #5 of 15 Old 03-02-2019, 06:56 AM
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Quote:
Originally Posted by viaqua View Post
Its the original calipers. Just strange it would drag on the right then after checking and putting it back together it started on the other side the same way..



All I did was compress the caliper and reinstall the pads. What is the possibility of both calipers failing at the same time??
Pretty common depending on local. Here in the NE brine zone is pretty bad. You can buy some time by spraying behind the seal with copious amounts of brake clean when you do pads. Based on the timing I would suspect like noted above you got some sticking after pushing the caliper cups back in when u did the pads.

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post #6 of 15 Old 03-02-2019, 11:25 AM
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Mine used to do that from time to time. Mostly heading down my dirt driveway. But it would apply a single front brake. I could feel it drag for 10' or so, then it would let off, another 20' reapply. Sometimes it would apply the brake hard enough to lock it up.

Couple times when driving around town it did it too.

This was all without me ever touching the brake peddle.

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post #7 of 15 Old 03-02-2019, 03:56 PM
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I'd recommend removing the mounting pins, cleaning thoroughly and reinstalling with new boots and brake lubricant.

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post #8 of 15 Old 03-02-2019, 04:22 PM Thread Starter
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Replaced calipers and flushed system, seems to be working ok for now.


Other than buying new calipers from Autozone and getting them home and one of them was an old core someone had put in a new box..
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post #9 of 15 Old 03-03-2019, 03:57 PM Thread Starter
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Angry New Development!!

Drove to work all was fine.

On the way home (3 miles) light stop-go traffic and by the time I get home its pulling/snatching to the right again..
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post #10 of 15 Old 03-03-2019, 05:14 PM
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When you changed the calipers did you pinch off the brake hoses?

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post #11 of 15 Old 03-03-2019, 06:55 PM Thread Starter
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Didn't pinch hoses, let them run fluid until I connected the new caliper. Hoses do look to be the factory hoses. They aren't stretched or pinched or anything.
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post #12 of 15 Old 03-04-2019, 05:41 AM Thread Starter
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What is going on with these brakes??

So I decide to drive to work only 3 miles from home.

Brakes feel a little spongy but still work fine, soon as it feels like its starting to pump up and build pressure after a few roundabouts and red lights it starts pulling again to the right.

Why would it be fine until it builds pressure? Only thing I haven't replaced so far is the hoses..
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post #13 of 15 Old 03-04-2019, 06:42 AM
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Hoses can be difficult to diagnose. The few times that they were the culprit for me it took cutting them up to see what was wrong.
I would jack the vehicle up and pump the shit out of he brakes until they were dragging, then crack the bleeders to see if they release.

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post #14 of 15 Old 03-04-2019, 07:01 AM Thread Starter
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Quote:
Originally Posted by rlee View Post
Hoses can be difficult to diagnose. The few times that they were the culprit for me it took cutting them up to see what was wrong.
I would jack the vehicle up and pump the shit out of he brakes until they were dragging, then crack the bleeders to see if they release.
Thanks,

I will try that for sure. It seems to be something mechanical since there's no dash lights or brake light warnings popping up.
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post #15 of 15 Old 03-04-2019, 03:18 PM Thread Starter
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Was told by a guy I work with that he had a similar problem but it was wheel sensors.

Anyone have any experience with wheel sensors causing this?
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