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Old 10-26-2013, 03:46 PM   #1
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clunking and rattleing noise

Hello, I have an 03' Wrangler with an auto trans and 4.0. I have a pretty bad clunking noise that I can feel in the floor board where the hump in the floor is for the trans. I can only feel and hear it when going really slow, but it is pretty loud. Cannot for the life of me figure out what it is. Thought I would ask here before I start tearing into stuff and see if anyone else has had this issue.
Thanks in advance.

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Old 10-26-2013, 06:29 PM   #2
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I hear/feel this on my 99' also but only when i first pull out in the morning or after it sits a while and then not everytime but somewhat often. Its no terrible loud but it's there. 4.0 Auto too... Would like to hear other's chime in on this!

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Old 10-26-2013, 10:09 PM   #3
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When does the noise occur?? All the time? Only cold?? Only when engines warm???
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Old 10-26-2013, 10:28 PM   #4
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I only hear it when i pull out... usually for a few seconds then its gone.
example... i start my JEEP back out of my driveway put it in gear hit maybe 5 mph and i hear the clunk/spinning of something right under the hump/gear shiftier area almost like it's kinda of hitting the floorboard almost. Not sure if this even makes sense but it happens... Again it doesnt happen everyday only sometimes???? For me anyway not sure about PO


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Old 10-26-2013, 10:36 PM   #5
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Old 10-26-2013, 10:44 PM   #6
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Old 10-26-2013, 10:54 PM   #7
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^ I had same symptoms on my '99 and that's exactly what it was. Bought the kit from the dealer, installed the bushings and spring boot, no more issue. Though the OP may have an exhaust issue or something else entirely given the description.

Billydales describes what my shift linkage issue sounded like.
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Old 10-27-2013, 07:49 PM   #8
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That sounds exactly what the problem is. I hear it when I am going really slow over bumps, the clunking is really fast most of the time. I hear it when I pull into my driveway too, slight uphill grade from asphalt to concrete.
Thanks for the responses.
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Old 10-27-2013, 08:14 PM   #9
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U joints?
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Old 10-27-2013, 08:51 PM   #10
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Quote:
Originally Posted by UFOtestpilot View Post
^ I had same symptoms on my '99 and that's exactly what it was. Bought the kit from the dealer, installed the bushings and spring boot, no more issue. Though the OP may have an exhaust issue or something else entirely given the description.

Billydales describes what my shift linkage issue sounded like.
If not fixed is there any foreseeable problems other than the noise? Is this a "MUST FIX"? Just want to make sure that it won't cause more problems in the future if I ignore it. Thanks!!
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Old 10-27-2013, 11:28 PM   #11
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Quote:
Originally Posted by Junky_One View Post
U joints?
Had the same issue and it was my front u joint
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Old 10-28-2013, 09:44 AM   #12
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The problem I described above is 100% NOT a U Joint issue. U Joints do not knock on the hump of your floor board lol.
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Old 10-28-2013, 09:48 AM   #13
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Quote:
Originally Posted by billydales_9 View Post
The problem I described above is 100% NOT a U Joint issue. U Joints do not knock on the hump of your floor board lol.
I could feel mine in the floorboard and when it flexed or got put under that initial load it would bang and rattle. Chances are nothing is hitting your floor board
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Old 10-28-2013, 09:57 AM   #14
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Quote:
Originally Posted by billydales_9 View Post
If not fixed is there any foreseeable problems other than the noise? Is this a "MUST FIX"? Just want to make sure that it won't cause more problems in the future if I ignore it. Thanks!!
Eventually it might, maybe, get bad enough to where the linkage comes apart and you can't shift into 4wd, and that's a big iffy maybe. I think the real-world honest answer is that the worst that will likely happen is you have an annoying noise every time you take off from a stop. This is of course IF your issue is the t-case bushing TSB listed above.

For $13-$20 and an hour (max) of your time though...
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Old 10-28-2013, 02:07 PM   #15
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Originally Posted by UFOtestpilot View Post
Eventually it might, maybe, get bad enough to where the linkage comes apart and you can't shift into 4wd, and that's a big iffy maybe. I think the real-world honest answer is that the worst that will likely happen is you have an annoying noise every time you take off from a stop. This is of course IF your issue is the t-case bushing TSB listed above.

For $13-$20 and an hour (max) of your time though...
Good point! This is on my shortlist weekend projects before it get zero degrees outside!
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Old 10-29-2013, 07:01 PM   #16
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Also if your cheap and want to know if its the linkage theres a black bushing that a rod goes info in the linkage pull the linkage down pack the bushing with grease and see if that works
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Old 12-11-2013, 08:14 PM   #17
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I'm thinking this is what my noise may be too. I've had people tell me it is clutch chatter, but it just doesn't seem right. I'm looking more into this. Thanks for the write-up.

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