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-   -   Weird Rattle Noise (http://www.wranglerforum.com/f282/weird-rattle-noise-238006.html)

thgr8alex 04-26-2013 09:23 PM

Weird Rattle Noise
 
So ive started to notice a rattle in my jeep. It doesnt happen at idle, only in motion. Happens both in gear and in neutral coasting. I dont really know what it would be, sounds to be coming from up front or under. Doesnt sound like its coming from the rear. And the noise sounds kind of like metal pieces in a blender or such. Obviously somethings wrong but im still learning and cant quite pinpoint my problem. And its a 1998 4.0 5spd with 131k. Thanks in advance if anyone can help me troubleshoot

thgr8alex 04-26-2013 10:17 PM

After a few more searches im starting to believe its my transfer case is low on fluid if not dry... Can anyone confirm this? And what type of fluid would go in it?

03Ruth 04-27-2013 05:44 AM

Hard to believe you t-case is dry or you would be having a lot more issues than noise. Have you checked into this...
http://www.4x4xplor.com/T-CaseTSB.html

thgr8alex 04-27-2013 07:04 AM

Quote:

Originally Posted by 03Ruth (Post 3688647)
Hard to believe you t-case is dry or you would be having a lot more issues than noise. Have you checked into this...
http://www.4x4xplor.com/T-CaseTSB.html

Ya i read that but thats not the noise im hearing

MLaborde 04-27-2013 07:26 AM

Quote:

Originally Posted by thgr8alex (Post 3688013)
After a few more searches im starting to believe its my transfer case is low on fluid if not dry... Can anyone confirm this? And what type of fluid would go in it?


Probably not the case but you should check it anyway. You should get to know the Jeep & it's fluids. At 131k, if you haven't changed them all, you should. It will give you a starting point for a proper maintenance schedule.

And put ATF+4 in the transfer case...

thgr8alex 04-27-2013 07:36 AM

Will do, i got the jeep december of 2011 so idk when it was changed. What else could the noise be? A bad ujoint maybe?

Nardoclark 04-27-2013 11:00 PM

I just bought a 2005 wrangler and I noticed a similar sound under my jeep. To me it sounds like a rattling sound. I thought it might be my catalytic converter or the shield rattling. My happens when I excess 30 mph. Once I go below 30 mh the sound stops. Really strange.

thgr8alex 04-27-2013 11:03 PM

Ya ive been trying to read to see if others have it and some say the jeeps tranny is just noisy like that and rattles but theres gotta be someway to fix it.. Im still on the hunt..

thgr8alex 05-02-2013 10:51 PM

So i still havent isolated a noise but im beginning to believe its a u joint or a seal. The sound is like a metal on metal grinding or metal in a blender. Not crazy loud thoughyou gotta focus to hear it (if your not me, cuzi hear it well since i drive it everyday). Got under the jeep and there is a ujoint at the general location the noise is coming from. The one that connects to the front axle. Could that ujoint be bad and causing my noise?

Patrick H 05-02-2013 10:54 PM

So the transfer case fluid level is fine...Are the U-joints tight? Did you check the catalytic converter?

thgr8alex 05-02-2013 10:57 PM

Quote:

Originally Posted by Patrick H (Post 3713082)
So the transfer case fluid level is fine...Are the U-joints tight? Did you check the catalytic converter?

I grabbed the ujoint and tried to move it and it didnt. I didnt check the cat but the noise just doesnt sound like it could be the cat. The noise happens while in motion. Whether im gassing it forward or its in neutral coasting. Only time it doesnt happen is when im stopped, even if revved.
Which led me to believe it could be ujoint... But im not sure

Patrick H 05-02-2013 11:00 PM

Front brake dust shield rubbing the rotor?

thgr8alex 05-02-2013 11:04 PM

Quote:

Originally Posted by Patrick H (Post 3713110)
Front brake dust shield rubbing the rotor?

That is a possibility since those got hit once or twice durimg my lift kit install. But the noise happened before lift too and i made sure to check them before i put tires back on. Ill check tommorrow but it just doesnt sound to be from tires. Its somewhere in the front axle/front ujoint/transmission/transfer case area. Not really on drivers or passengers side either. From what i can tell its center if not a bit towards drivers side

thgr8alex 05-04-2013 09:54 PM

What should i be looking for? Or a better question to help me learn, what all spins or rotates under the jeep while in motion from the front?

UFOtestpilot 05-04-2013 10:02 PM

I finally found my annoying rattle. It was the transfer case shift linkage bushings. It was mostly the one at the bracket. There is a redesign that came out as a TSB way back when. Part number starts with 501, but I can't find the package now. Anyhow, something to think about, $13-$25 depending. I got mine next day from a local dealership @ $23.

On the hunt for it I checked ball joints, ujoints at axle and driveshaft, end links, shock mounts, transmission and motor mounts, exhaust, AT lines under motor, flywheel inspection cover, and anything else I could think of while I was under there. Good luck with yours!

EDIT: I see 03Ruth provided a link for the TSB in post #3!

thgr8alex 05-04-2013 10:05 PM

Does your rattle match the description of mine? I.e. Only happens while in motion, not in idle even if revved? Because i really dont know where to start and dont have the money to start replacing pieces left and right. Finding the problem and replacing it til the next thing goes out is what id like to do haha.

thgr8alex 05-04-2013 10:08 PM

Quote:

Originally Posted by UFOtestpilot (Post 3720172)
EDIT: I see 03Ruth provided a link for the TSB in post #3!

Thanks but that describes the noise as "creaky/thumping". Mine is not like that. Mine sounds like glass in a blender or little metal pieces being spun around.

UFOtestpilot 05-04-2013 10:15 PM

Mine happened when I first took off, but not over bumps (I think there are varying degrees of wear here). Anyhow, I had the suspicion that the t-case bracket was the culprit, but the noise would shift around just enough to give me doubts. I got under the jeep a couple weeks ago and unhooked the front links, then drive around the block, noise still there. I unhooked the front driveshaft and, still there. I reached up to the linkage from behind the skid plate and wiggle the rod pretty firmly in all directions, shaking front to back then side to side. I heard what I believed to be the same exact noise but from a different perspective. That is when I made the decision to replace the t-case linkage bushes.

When I took it apart, cleaned everything up, and realized how they had improved on the design I just knew that it was going to at least be better. They added a boot with a spring, the gasket has a full cup for the torque rod to recess into that doesn't allow crud to build up on it.

Crawl under there and wiggle the rod around, see if you hear something resembling your noise.

UFOtestpilot 05-04-2013 10:16 PM

Quote:

Originally Posted by thgr8alex (Post 3720188)

Thanks but that describes the noise as "creaky/thumping". Mine is not like that. Mine sounds like glass in a blender or little metal pieces being spun around.

So did mine, that's why it took me so long to find it. What I was hearing didn't match the TSB description.

thgr8alex 05-04-2013 10:19 PM

Quote:

Originally Posted by UFOtestpilot (Post 3720209)

So did mine, that's why it took me so long to find it. What I was hearing didn't match the TSB description.

Ok thanks so much! Ill be getting under her tomorrow morning and wiggling that part around. If it moves at all its bad right? It should be tight and stationary for it to be not the problem?

UFOtestpilot 05-04-2013 10:29 PM

Quote:

Originally Posted by thgr8alex (Post 3720220)

Ok thanks so much! Ill be getting under her tomorrow morning and wiggling that part around. If it moves at all its bad right? It should be tight and stationary for it to be not the problem?

No, it moves and it should, but it shouldn't rattle. If you wiggle the rod hard and you hear a noise that if produced in rapid succession could sound like your noise then you are likely at the cause. Mine sounded like gears slipping a chain a bit, and/or a light rapid tapping of metal, almost like a binding coil spring pinging.

thgr8alex 05-07-2013 02:25 PM

Update: i got the transfer case shifter tsb part from the link in the 3rd post from the dealer and installed it this afternoon. The noise is NOT gone. Sounds just the same as it did before. What else could it be? Maybe a bearing or something in the front ujoint?

UFOtestpilot 05-07-2013 03:48 PM

Have you opened up your front diff to look for chunks, or checked your axle ujoints, or the axle inners?

thgr8alex 05-09-2013 09:59 PM

I havent gone that far. Just replaced transfer case shifter. The noise isnt loud. Anyone besides me can barely hear it if they even hear it at all. Only reason i can is because i drive her everyday haha but it drives normal so im going to continue to drive until it gets louder and more noticeable. Could just be me overthinkin it and it could just be nothing. When it gets louder or starts causimg trouble ill post up again

Kssun 05-30-2013 07:26 PM

I notice you said you were pretty sure it wasn't your front u-joints but the noise you are describing is very similar to what I am hearing and I just found my front passenger u-joint is definitely bad now that I found it.

I could only hear my noise when a wall was on the passenger side of the jeep, or if there was a vehicle with a fairly low road clearance but tall side (like mini vans) was on my passenger side. Most of the time I cant hear it in the vehicle at all. Whether in gear or not, while in motion. It sounded to me like metal squares were being shaken in a small metal coffee can.

I found it when I rotated the front shaft back and forth, I heard a clanking on the front passenger wheel location. Looked closer and found the axle u-joint is clearly not firm and rattles when moving it. Now I just need to find the replacement parts and I figure I have my project for this weekend. I think this could be the cause of some vibe I feel at 50mph too, so crossing my fingers. Good luck though.

pi55edoff 05-30-2013 09:18 PM

Do you have the CV bearing between your two center I joints? I had the same thing on my 2000. This might not be the correct name for it but if you call up a driveline shop they could help or maybe someone on here has more info on it. Think I got the new bearings for $50. An entire replacement is over $300. It's a pain in the butt but its worth it to save on the $$$$.

Arsonistsavior 05-30-2013 10:00 PM

Wow. I'm glad I found this thread. Now I know what I was hearing and how to look for it. I too hear what seems to be metal shavings in a metal can shaking only when I'm near a wall or lower vehicle as well. Now to look into to get out of this rut.

thgr8alex 05-30-2013 10:08 PM

Ya thats kind of what i thought it was but never got around to doing it as it still drives fine. But over the summer in the next few weeks it will get addressed

okie41 05-30-2013 10:34 PM

i have put it on jack stands ,engage front axle,put it in gear, with engine running, take 3 foot peice of garden hose put one end next to your ear & lesson for noise ,I have done this, u may not feel cofortable doing this. Works locating 4 wheel drive problems to .

Kota7x 05-31-2013 12:37 AM

Check your U joints. I had a grind like that and only found it when I changed my driveshaft. I took the end cap off of the old U joints and they were completely dry.


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