Uneven rotor wear, cut lines in pads, clogged slots - Jeep TrackHawk Forum
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post #1 of 21 Old 07-25-2018, 12:51 AM Thread Starter
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Uneven rotor wear, cut lines in pads, clogged slots

8000 easy miles (4000 miles just driving Detroit to Alaska). I've been getting some shudder but it comes and goes.

I started trying to figure it out once I saw uneven wear on the rotors. These wear lines line up with the end of slots that are clogged. I'm speculating that the brake dust from the clogs are creating high spots that then cut into the pads and also create the high rotor lines.

Anyone else seeing this?

I spent a bunch of time trying to scrape out all of my rotor slots. It is a PITA getting between the dust shield and the rotor on the back side.

I know some folks are changing pads, but I'd prefer not to be doing that especially so early. The cosmetic dust isn't really bothering me that much.
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post #2 of 21 Old 07-25-2018, 01:56 AM
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Ouch! I haven't seen that on mine...yet.

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post #3 of 21 Old 07-25-2018, 08:12 AM
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This is weird…. Have you been driving down a lot of dirt roads? The only thing I can think of is some small stones worked their way into the grooves on the rotors and cut the grooves into the pads. Has this occurred on both rear rotors or just one? The rear rotors & pads are the same on the TH as they are on the GC SRT so if this was common you would think we would hear of it happening more often.

I would see if your local dealer will replace the pads and turn or replace the rotor as a manufacturer defect since you only have 8k miles on it.
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post #4 of 21 Old 07-25-2018, 08:17 AM
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Looks like you got some trash in between the pad and rotor and it cut into both over time.


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post #5 of 21 Old 07-25-2018, 12:03 PM Thread Starter
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No pebbles or anything were in the grooves - only caked-in brake dust. I'm thinking it migrates to the edge of the slot and cuts the pad in that spot. The rears were where it was most noticeable, probably due to the smaller swept area. This was not isolated to one spot.

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post #6 of 21 Old 07-26-2018, 09:04 AM
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So that happened on all 4 rotors? If trash/big deposits got hooked and started at the back of the pad, it could eat into and travel through it over time. The circular scoring in the rotor and the wear on the pads in the pics shown would suggest that.

The dust/build up transferred on the rotors would look more like heat checking with low/high spots. The pad deposits in the micro cracks on the rotor surface would cause this to happen. Looks almost like cheetah print. Heat checking is completely normal and will not cause any problems however.

How thick are the rotors? You may be able to skim cut them and reuse with new oe pads, depending on the thickness.


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post #7 of 21 Old 07-26-2018, 03:10 PM Thread Starter
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Quote:
Originally Posted by DemonSkip View Post
So that happened on all 4 rotors? If trash/big deposits got hooked and started at the back of the pad, it could eat into and travel through it over time. The circular scoring in the rotor and the wear on the pads in the pics shown would suggest that.

The dust/build up transferred on the rotors would look more like heat checking with low/high spots. The pad deposits in the micro cracks on the rotor surface would cause this to happen. Looks almost like cheetah print. Heat checking is completely normal and will not cause any problems however.

How thick are the rotors? You may be able to skim cut them and reuse with new oe pads, depending on the thickness.
With 8000 miles, I have plenty of rotor thickness left. Both sides of the rears were noticeable (easiest to see on the pads). The most obvious rotor impact shown in my photo lines up exactly with the end of a slot. Roughly 1/2 of all of my slots were at least partially impacted with brake dust.

I may take a rainy weekend and see what I can do about the worst rotor lines. I expect it will be time consuming and require a lot of care to do it right since I don't own a brake lathe and rumor has it that shops will refuse to work on slotted rotors. Living in Alaska is only going to make that part harder.
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post #8 of 21 Old 07-26-2018, 10:08 PM Thread Starter
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I brought my photos and talked to the dealer to get their opinion on warranty. Talked to someone in service and the warranty guy. They’re going to talk to the shop manager and get back to me.


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post #9 of 21 Old 07-27-2018, 08:34 AM
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If you have issues with the OEMs, you can give our 2 piece setup a try. We have a replacement that's a bit lighter with about the same price tag for the fronts, with OEM pricing in mind. The rears we offer are also a 2 piece but are significantly higher in price, when compared to the oem rear cast 1 piece units.
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post #10 of 21 Old 07-27-2018, 03:02 PM Thread Starter
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Dealer has scheduled me for an appointment to look more closely - August 7th.

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