Chirping Sound in the Rear... Bad wheel bearing? - JeepForum.com
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Unread 03-31-2015, 03:23 PM   #1
ciphershort
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Chirping Sound in the Rear... Bad wheel bearing?

Hello all,

I've had a chirping sound for quite some time but it comes and goes. Well now its back and it sounds like a freaking bird chirping when I'm coasting, braking, and sometimes accelerating. Brake system looks good. The sound does slightly change when mildly braking. I'm thinking it may be a bad wheel bearing as it sounds like its from my rear drivers side wheel. Question is...how do I confirm? I know if its a bad hub/bearing up front, you can jack the vehicle up and see if your wheel moves on the hub but I doubt this is a valid test for the rear. Any ideas would be greatly welcome.

Thanks!

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Unread 03-31-2015, 03:32 PM   #2
goodwrenchdave
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check your u-joints for seizing. most likely that is the chirp. remove the driveshaft (easy) and check articulation.
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Unread 03-31-2015, 03:34 PM   #3
JeepersDigest
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If one is capable of removing the rotors.. they might noticed a build up of mud etc in the drum part within the rotor. This drum part/area is there for the Emergency brake.. if left unclean or unchecked (routinely) the buildup of mud and debris can force the e-brake to lock up and disintegrate the brake pads completely. Remove the rotors, clean the area and grease the e-brake cable.
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Unread 03-31-2015, 03:43 PM   #4
goodwrenchdave
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Quote:
Originally Posted by JeepersDigest View Post
If one is capable of removing the rotors.. they might noticed a build up of mud etc in the drum part within the rotor. This drum part/area is there for the Emergency brake.. if left unclean or unchecked (routinely) the buildup of mud and debris can force the e-brake to lock up and disintegrate the brake pads completely. Remove the rotors, clean the area and grease the e-brake cable.
Yes the e-brake shoes rubbing is a possibility and very easy to check first... almost forgot . slightly pull on it while slowly rolling and see if the sound goes away. No need to remove all right away
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Unread 03-31-2015, 03:52 PM   #5
JeepersDigest
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goodwrenchdave, NP.. in our case.. the rear brake pads were completely gone, reduced to a leaf, and once the caliper was removed, the pad (or what was left of them) simply floated to the ground..
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Unread 04-01-2015, 09:14 AM   #6
ciphershort
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Sound doesn't change when applying the e-brake. I had that thought last week and tried it. I've had someone hang out the back of the Jeep while the sound was being made and they confirmed that it is definitely coming from the driver's side rear wheel. I'll see if I can take the rotor off and see if its dirty though.
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Unread 04-01-2015, 01:00 PM   #7
Neo1130
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Mine was a loose shock bolt. Check them by hand...
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Unread 04-01-2015, 07:15 PM   #8
Neo1130
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Or rock the jeep from side to side with a friend...
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Unread 04-01-2015, 07:32 PM   #9
jwmbishop
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Quote:
Originally Posted by Neo1130 View Post
Mine was a loose shock bolt. Check them by hand...
Best way is by wrench...
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Unread 04-01-2015, 07:42 PM   #10
Neo1130
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Applying a wrench would be a way to fix. I was giving a no doubt to troubleshooting...
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Unread 04-02-2015, 06:37 AM   #11
ciphershort
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thanks for all the help guys. rocking the jeep back and forth doesn't make the sound. shock bolts are tight as well. its only when the wheel is spinning. it really starts going off in the 30-40mph range on a flat straight road maintaining a constant speed. seems to be something circular as it happens at a certain point of the revolution of the tire for example when driving faster the chirps are closer together and when driving slower the chirps are farther apart if that makes sense.
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Unread 04-02-2015, 12:34 PM   #12
jwmbishop
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Originally Posted by Neo1130 View Post
Applying a wrench would be a way to fix. I was giving a no doubt to troubleshooting...
Well yes - but if you knew what a wrench party was...

It when the race crew gathers one last time pre race and every one gets a wrench. Then makes sure every damn bolt matching their wrench on the car is tight. That's really the ONLY way to know...

I was jus being facetious...
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Unread 04-02-2015, 12:51 PM   #13
romank
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If those are disks and not drums it should be the metal tang that alerts you to the pads getting near replacement time. Easy test is lift the rear, chock off at least 2 of the other wheels, put in neutral and spin that tire. If you hear it then it's not the driveshaft and doubtful it's a bearing. Bearings tend to growl more than chirp. Odd because the fronts typically go first but.........
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Unread 04-02-2015, 02:42 PM   #14
ciphershort
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Quote:
Originally Posted by romank View Post
If those are disks and not drums it should be the metal tang that alerts you to the pads getting near replacement time. Easy test is lift the rear, chock off at least 2 of the other wheels, put in neutral and spin that tire. If you hear it then it's not the driveshaft and doubtful it's a bearing. Bearings tend to growl more than chirp. Odd because the fronts typically go first but.........
They are disks. I checked the pads a while back and they still had plenty left. The only thing that has me thinking it isn't the brakes is I hear the chirp even when I'm not braking. Plus, brake pad squealers usually make a constant noise (not a chirp) since it is the metal in the pads making contact with the rotor.
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Unread 04-02-2015, 02:56 PM   #15
Kiwi Jeeper
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I had harmonic chirping like that from the right rear wheel recently. I took off the brakes and cleaned everything really well. Then greased the slid pins. Noise is gone for now.

One shop said my wheel bearings were gone. Another shop said disc was out of round or warped. I tried the simplest way first before spending money. For me it was a noise that went away when brakes were fully applied. No shudder or growling.
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