Mystery Front Brake Issue? - JeepForum.com

 
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post #1 of 15 Old 11-10-2013, 07:08 PM Thread Starter
LeoSchultz
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Mystery Front Brake Issue?

Hello,
I have a 98 Grand Cherokee Limited, 5.2. I have just replaced all the calipers, and the passenger side wheel bearing and hub assembly. When i drive it over 50 miles per hour, the front passenger side wheel feels like it is braking by itself.. WHAT could this be? This has been an issue for about 6 months now and Im out of things I can think of. Please any advise would be great!

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post #2 of 15 Old 11-10-2013, 07:21 PM
bigbill888
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Bad tire? Front end way out of alignment? I've heard (never witnessed) of the rubber portion of the brake line coming apart inside and not allowing the brake fluid to retreat after releasing the brake.

96 ZJ Laredo, 4.0, 242, 230K
95 ZJ Limited, 4.0, 242, 140K
98 XJ Sport, 4.0, 231, 140K
All work well
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post #3 of 15 Old 11-10-2013, 07:26 PM
bigbill888
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The little sliders where the brake pads rest develop a notch that shouldn't be there. Is yours so bad that the pad is forced against the rotor? I ground the "shoulders" of the grooves off in an effort to allow the pads to move back and forth unhindered.

96 ZJ Laredo, 4.0, 242, 230K
95 ZJ Limited, 4.0, 242, 140K
98 XJ Sport, 4.0, 231, 140K
All work well
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post #4 of 15 Old 11-10-2013, 07:34 PM Thread Starter
LeoSchultz
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Quote:
Originally Posted by bigbill888 View Post
The little sliders where the brake pads rest develop a notch that shouldn't be there. Is yours so bad that the pad is forced against the rotor? I ground the "shoulders" of the grooves off in an effort to allow the pads to move back and forth unhindered.
I believe there is a notch, I thought it was susposed to be there I'll take a look tomorrow and see what I can do about it.
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post #5 of 15 Old 11-11-2013, 03:58 AM
gearheadnick
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If there is a notch, repairing it is relatively easy. Just fill in the notches with a welder and grind it flat. I've already done my rear brakes, just haven't gotten around to doing the front.

My cylinder head overhaul: http://www.jeepforum.com/forum/f13/cylinder-head-r-r-picture-heavy-1348138/
My transmission overhaul: http://www.jeepforum.com/forum/f13/how-change-transmission-electronics-1560948/
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post #6 of 15 Old 11-11-2013, 05:49 PM Thread Starter
LeoSchultz
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Quote:
Originally Posted by gearheadnick View Post
If there is a notch, repairing it is relatively easy. Just fill in the notches with a welder and grind it flat. I've already done my rear brakes, just haven't gotten around to doing the front.
I have another question: can I remove the front axle shaft to turn this into a two wheel drive temporarily? Or is there more I have to do?
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post #7 of 15 Old 11-11-2013, 06:24 PM
JasonStebbins
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Quote:
Originally Posted by LeoSchultz View Post
I have another question: can I remove the front axle shaft to turn this into a two wheel drive temporarily? Or is there more I have to do?
Yes, but front drive shaft, not axle shaft. Sounds like a sticky caliper to me. Or collapsed brake line.

Poop
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post #8 of 15 Old 11-11-2013, 06:27 PM Thread Starter
LeoSchultz
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A colasped brake line would cause this even after I have not pressed the brake for over 5 miles before hitting 50 mph?
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post #9 of 15 Old 11-11-2013, 06:31 PM
JasonStebbins
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Quote:
Originally Posted by LeoSchultz View Post
A colasped brake line would cause this even after I have not pressed the brake for over 5 miles before hitting 50 mph?
Over time the rubber lines to the calipers develop a bubble that can intermittently stop flow. I say its a bad caliper still.

This happens randomly while driving even when not braking?

Poop
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post #10 of 15 Old 11-11-2013, 06:35 PM Thread Starter
LeoSchultz
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Yea. Its random. The brakes function normally otherwise. No other issues with the brakes.
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post #11 of 15 Old 11-11-2013, 06:39 PM
JasonStebbins
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Quote:
Originally Posted by LeoSchultz View Post
Yea. Its random. The brakes function normally otherwise. No other issues with the brakes.
Swap in a new caliper to rule it out. Cheap, fast and easy. Inspect the rubber line while your down there. I can't think of anything else that would make the pad drag on its own besides the grooves mentioned before.

Poop
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post #12 of 15 Old 11-11-2013, 06:41 PM Thread Starter
LeoSchultz
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Ok. Will definitely do that. Could a bad CV cause the same thing to happen? And IF I take out the front drive shaft, will that change the towing capacity?
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post #13 of 15 Old 11-11-2013, 11:28 PM
JasonStebbins
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If a CV actually broke apart, it could lock up the wheel, but you never mentioned that it seized completely. Sounds like a brake issue.

I don't see how that could affect towing capacity. But you do have all time 4wd with that transfer case, so don't drive off the road.

Why are you removing the front shaft anyway?

Poop
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post #14 of 15 Old 11-12-2013, 06:15 AM Thread Starter
LeoSchultz
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It was just a thought, I was wondering if you can.
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post #15 of 15 Old 11-12-2013, 06:18 AM Thread Starter
LeoSchultz
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And no, it has not seized up at all, just the grabbing issue. I need to find a welder and grinder so I can fix the groove and replace the rubber brake line and then we shall see what's going on.
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