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Old 06-22-2012, 11:10 PM   #1
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Squeak? Rattle? Driving me nuts!

So about a week ago I'm riding next to another car and hit a bump, hear a rattle that sounds like something is loose (metallic sound) and I think man, that car next to me needs something tightened. Then I pass another car and hear the same thing! Now I notice it on almost every bump. I can't recreate the sound when parked and it only happens on rough bumps or cracks in the road. Any idea what it could be?

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Old 06-22-2012, 11:18 PM   #2
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Could be a number of things, maybe exhaust mounts?

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Old 06-22-2012, 11:21 PM   #3
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I tried shaking the exhaust and couldn't get any noise out of it, any other ideas?
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Old 06-22-2012, 11:25 PM   #4
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Can you isolate if it is inside/outside the cabin?
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Old 06-22-2012, 11:26 PM   #5
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I think its outside because if I'm riding next to a concrete barrier or car I can hear it more
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Old 06-22-2012, 11:39 PM   #6
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It can be hard to run down the source of a squeak. If I'm having trouble locating the source, sometimes I'll either have someone ride with me and listen, or drive so I can listen. They/you may have to sit up front and switch to the back seat to hear where it's coming from. If you can pin down which side it's coming from and whether or not it's coming from the front, back or center, it'll be easier to diagnose.
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Old 06-22-2012, 11:43 PM   #7
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I'll fold the top down tomorrow and try to find it. Would greasing the zerks help?
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Old 06-23-2012, 04:23 AM   #8
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Could be a bad cat, or the shift linkage bushing pooping out. Try pushing down on the 4x4 lever and see if it stops. Mine is worn and rattles all the time, especially over bumps and stuff.
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Old 06-23-2012, 06:30 AM   #9
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The rattle you hear is the cat. You better change it now it will only get worse and make your jeep run like crap (black smoke, absolutely no power...) I let mine go and now it can't get out of its own way
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Old 06-23-2012, 08:37 AM   #10
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I had a rattle much like you describe. I crawled under the truck with a flash light and found the rattle. The fuel / brake lines that run down the driver side frame rail popped out of the plastic holder and were laying against the frame. The plastic holder looks a little like a spark plug wire separator. It is a push in part like a door panel has to hold it in place. I pushed it back in place but it would not stay. To fix the problem, I used a large tie wrap around the frame and lines and rattle is gone.

I tried to buy a new line holder from the dealer and discovered that you have to buy the lines to get the line holders. The cost for the lines was around $70.00. The tie wrap worked and was a cheap fix. I had one other rattle and it was a mounting bolt for the Best Top side step hitting the bottom of the cab. I tack welder the steps to the frame and removed the bolts. My jeep is currently rattle free...

Hope this helps,
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Old 06-23-2012, 12:49 PM   #11
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I'll check the fuel/brake lines today. Is there anyway to verify that the cat is bad before I replace it?
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Old 06-23-2012, 01:40 PM   #12
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I'll check the fuel/brake lines today. Is there anyway to verify that the cat is bad before I replace it?
Some cats have a heat shield that comes loose. While you are under there, inspect it. You may be able to tap on it with you hand to see if anything sounds loose.

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Old 06-23-2012, 02:04 PM   #13
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I get alarmed when my TJ stops squeaking and rattling.. then I have to search for what fell off/broke
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Old 06-23-2012, 02:52 PM   #14
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I wouldn't assume anything and start changing parts. The noise has to be coming from somewhere. It may take time and patience to find it, but it could save you a bunch of money in the long run.
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Old 06-23-2012, 02:54 PM   #15
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For sure, I don't wanna throw money at it until I know what exactly is going on
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Old 06-23-2012, 03:48 PM   #16
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Just shook everything I could under the front end and nothing was loose/all bushings in place. It sounds more like a rattle and seems to be coming from the passenger side.
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Old 06-24-2012, 09:09 PM   #17
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If you don't want to change the cat just run it. You will notice a huge power loss and black smoke. Then you know its the cat. This is what I did lol.
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Old 06-24-2012, 09:46 PM   #18
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Well, I had a squeak and it was the hood latch sliding up and down against metal...the little plastic slide that it rides against had broken, it was hard to find!
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Old 06-24-2012, 11:32 PM   #19
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Climbed under it again today and still couldn't find anything. I can't recreate the noise sitting still and compressing/rocking the suspension. It sounds like something loose that rattles when I hit bumps. Only really notice it when my passenger window is down...
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Old 06-25-2012, 12:01 AM   #20
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Sway bar links? Did you check those? Also check your shock mounts. If its happening when you go over bumps only that'd be the first places id look.
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Old 06-25-2012, 12:05 AM   #21
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If you're just shaking the exhaust, it may not be enough to make the cat rattle if that's where it's coming from. Take the heel of your hand and hit the underside of the exhaust as close to the cat as you can. If something is loose inside, it should rattle.
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Old 06-25-2012, 01:12 AM   #22
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Sway bar links? Did you check those? Also check your shock mounts. If its happening when you go over bumps only that'd be the first places id look.
that's what mine was, sounded like a pocket full of change everytime I went over a bump. Rear sway bar link was loose.
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Old 06-26-2012, 09:37 AM   #23
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Ill double check the sway bar links today. I drove off a ledge today at different angles and its definitely coming from the front passenger side.
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Old 06-26-2012, 01:22 PM   #24
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Mine does the same thing but only after it warms up. We think is on the passenger side under the floorboards. Sounds like the exhaust pipe is loose.
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Old 06-26-2012, 01:38 PM   #25
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There is a heat shield above the exhaust and they may be hitting the muffler or cat
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Old 06-26-2012, 01:43 PM   #26
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Well, I had a squeak and it was the hood latch sliding up and down against metal...the little plastic slide that it rides against had broken, it was hard to find!

Thats what was wrong with mine too!! driving me crazy until i loostened my hood latches to check the oil and boom there was my squeak. searched for weeks
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Old 06-26-2012, 01:44 PM   #27
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when mine banged like that, it was my stupid front bumper. One weld broke and it cause the whole bumper to move about 1/4 inch front to back. Every bump and you'd have thought I had a wheel about to come off it banged so loud!!!

Have to check everything!
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Old 06-26-2012, 09:19 PM   #28
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Just make sure you check the shift linkage as I stated earlier. All three of my jeeps made a rattle/bang noise from it. It's so easy to eliminate it by pressing down on the lever before going over bumps. I just fixed my 99's lever with AA's shift bracket. No more rattle.
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Old 06-26-2012, 09:27 PM   #29
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I tried that the other day and no change. I'll try it again tomorrow
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Old 06-26-2012, 10:39 PM   #30
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Just make sure you check the shift linkage as I stated earlier. All three of my jeeps made a rattle/bang noise from it. It's so easy to eliminate it by pressing down on the lever before going over bumps. I just fixed my 99's lever with AA's shift bracket. No more rattle.
I had the same problem with my transfer case linkage...the plastic bushings kept popping out and the loose linkage would thump against the skid plate. Turns out the reason they wouldn't stay in was because of a bad rear tc/trans mount.

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