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Old 05-30-2014, 11:51 AM
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Rubber Squeaking Noise

I have a 2003 WJ w/ the 4.0L motor.

This afternoon I get in the Jeep and go to lunch with the windows down. I noticed the Jeep is making 2 weird noises. One of them sounds like a rear brake rotor not letting go and dragging on a slightly warped rotor. The other noise is one that leaves me scratching my head.

It sounds like a rubber squeaking noise coming from behind the driverís seat (on driverís side). Imagine the noise when you have a wet shoe and walk across tile, it sounds like that. Itís only a short squeak and not constant. The frequency of occurrence appears to be proportional with vehicle speed. It doesnít get any louder/softer, just more/less frequent as speed changes.

I also noticed that the noise goes away when Iím accelerating. When I let of the gas and coast to a stop, it comes back. It appears happens regardless if Iím coasting to a stop or pushing the brakes. Once I got back from lunch I crawled under the Jeep by the back wheel for a quick look. It doesnít look like thereís a lot of rubber to squeak. The rubber brake lines are where they should be and the driveshaft has no play. I did notice there is a mixture of oil and road debris on the dust shield of that wheel and it is wet, indicating new oil.

I replaced both rear main seals and bearings about 50k miles ago or about 2.5 years ago. Thatís 50k miles of about 90% or more highway.

Anyone have any ideas before I break into it this weekend? Iím going to start by taking the calipers off in an effort to fix the drag issue. Other than that I plan on checking where the leak is coming from, checking brake fluid level (for safety), and checking rear diff fluid. Iím assuming caliper or rear main seal is shot. Other than those possibilities, any other ideas on what it might be?
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Old 05-31-2014, 06:40 AM
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Re: Rubber Squeaking Noise

Did you check if there was something stuck in the tire thread? The fact that the intermittent noise is speed related, reduces the possibilities to something rotating.
Good change that the caliper has a slight leak at the piston seal or the brake line connection, it would be bad luck if the axle seal already leaks after so few miles.
Did you lubricate the caliper sliding pins before? Not doing that can cause the caliper to stick and finally seize.
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Old 05-31-2014, 07:23 AM
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Re: Rubber Squeaking Noise

Quote:
Originally Posted by Frango100 View Post
Did you check if there was something stuck in the tire thread? The fact that the intermittent noise is speed related, reduces the possibilities to something rotating.
Good change that the caliper has a slight leak at the piston seal or the brake line connection, it would be bad luck if the axle seal already leaks after so few miles.
Did you lubricate the caliper sliding pins before? Not doing that can cause the caliper to stick and finally seize.
I did grease the caliper pins last time I changed the rear brakes.

As I was driving the car home (almost 40 miles at highway speeds) the sound changed from a rubber sound to a slight metallic noise. I got the wheel, caliper, and rotor pulled off. Looked around at the caliper and it doesn't appear to be leaking, just has oil on it. The leak is definitely coming from the rear axle seal. I checked the log book and I changed it in April 2012. It only lasted 2 years and 40k miles.

With all that off I looked around. The bearing is definitely bad. I can feel and hear it's bad when I turn it by hand. I also noticed that my rear a-arm bushings are completely shot. The driver's side bushing give about 1" of vertical play when I push it by hand. The passenger's side bushing doesn't give any measurable play, but I can move it up/down a little by hand. Last night I managed to get the bushing bolts removed and loosened all the ball joint bolts. Figure I'll take it out, sand blast it, paint it, and replace the bushings/ball joint.

There was a a-arm bushing thread here not long ago. Was the consensus to use Dorman bushings? Then I'll pick up a Moog ball joint and call it a day. Then I'll take the axle and a-arm to the shop to have them press everything in place.
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Old 05-31-2014, 07:32 AM
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Re: Rubber Squeaking Noise

Yes, if you want to stay with rubber bushings, then Dorman or OEM. Never go with the Omix crap. TJXJWJ used an other brand i believe, check out his thread: Rear upper A arm bushings
But one of the members just ordered a superpro poli kit for the a-arm bushings. I wonder how that will be.
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Old 06-05-2014, 07:59 PM
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Re: Rubber Squeaking Noise

I got the rear bearing and axle seal replaced. Also got 2 new bushings and a new ball joint on the rear a-arm. Now the Jeep rides like a new animal, much improved.

I think I'm going to buy a Harbor Freight 20T press. Between the bushings, ball joint, and bearing it was $80 to the shop. For $200 I can get the press and save myself a bunch of future costs.
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