Annoying Rattle/Vibration - JKowners.com : Jeep Wrangler JK Forum
 
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post #1 of 16 Old 02-23-2015, 11:35 PM Thread Starter
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Annoying Rattle/Vibration

every since I bought my Jeep last September it has had an annoying rattle/vibration. I first noticed it when it only occasionally did it upon acceleration from a dead stop. even then it didn't do it all the time, only when I took off fast from a dead stop.

lately it started doing it even when I take off in a normal fashion and it will sometimes even do it when I accelerate after already in motion. it sounds like it comes from the front half of my Jeep and only lasts about 1 to 2 seconds. I can barely feel it in the steering wheel and floor boards when it does it.

I know it's not from the tires because it has done this through 2 sets of tires and they have all been balanced and properly rotated. I have also recently replaced both ring and pinions along with all of the axle bearings and seals. the vibration/rattle was heard and felt before and after these were replaced also.

I have heard people say they have had a rattle from a heat shield but I don't think that is my case. if it was I believe I could hear/feel this when my Jeep is in park/neutral when reving the engine but I can't duplicate it this way. it only wants to make the noise when I am in motion.

I am lost on what to check now. does anyone have any idea's? oh forgot to mention this is a 2011 JKUR with an automatic transmission.

2011 Wrangler Unlimited Rubicon
- 3.5" Rubicon Express lift /w 1.25" BL
- 5.38 Yukon gears
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post #2 of 16 Old 02-24-2015, 05:29 AM
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Could be your fender liners

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post #3 of 16 Old 02-24-2015, 07:10 AM
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Also if you have an aftermarket exhaust you can also check if the piping is rubbing anywhere, the exhaust shifts in the mounts when the engine is under load. Mine was rubbing the frame but only under hard acceleration or when reversing. (It was hitting the factory transfer case skid and also the frame above the rear axle.)
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post #4 of 16 Old 02-24-2015, 11:05 AM
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is yours a manual? do you feel like its coming from around the stick? I get this, mostly in 3rd gear, sometimes 4th... It seems to come and go... I havent enough data to be sure, but I feel like when I have a passenger it doesnt do it. I have read a few things that infer it might be wiring under the interior trim that can be buffered to stop it, but I havent had the chance to get in there yet.
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post #5 of 16 Old 02-24-2015, 11:09 AM
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If it is your exhaust it will not duplicate idling in park. Maybe try and and apply some gas in park to see if you hear the rattle then. This is how I diagnosed my exhaust rattle. Annoying as shit. And would only do it taking off or accelerating. Took it to an exhaust shop and they made an adjustment. No longer have issue. Good luck
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post #6 of 16 Old 02-24-2015, 03:00 PM
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I had this problem and it was a broken weld on the heat shield. Get underneath it and check all the welds where it connects. I fixed mine with a hose clamp.

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post #7 of 16 Old 02-24-2015, 08:16 PM Thread Starter
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Quote:
Originally Posted by PhrogMech46 View Post
Could be your fender liners
it did this before I cut my fenders and it only does it intermittently. I will investigate it though.

2011 Wrangler Unlimited Rubicon
- 3.5" Rubicon Express lift /w 1.25" BL
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post #8 of 16 Old 02-24-2015, 08:17 PM Thread Starter
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Quote:
Originally Posted by Biginboca View Post
Also if you have an aftermarket exhaust you can also check if the piping is rubbing anywhere, the exhaust shifts in the mounts when the engine is under load. Mine was rubbing the frame but only under hard acceleration or when reversing. (It was hitting the factory transfer case skid and also the frame above the rear axle.)
it's still my stock exhaust. I haven't had the funding to upgrade it yet. I will crawl under it and shake it to see if it makes contact with anything.

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- 3.5" Rubicon Express lift /w 1.25" BL
- 5.38 Yukon gears
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post #9 of 16 Old 02-24-2015, 08:18 PM Thread Starter
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Quote:
Originally Posted by WhiteBoy View Post
is yours a manual? do you feel like its coming from around the stick? I get this, mostly in 3rd gear, sometimes 4th... It seems to come and go... I havent enough data to be sure, but I feel like when I have a passenger it doesnt do it. I have read a few things that infer it might be wiring under the interior trim that can be buffered to stop it, but I havent had the chance to get in there yet.
it's an automatic

2011 Wrangler Unlimited Rubicon
- 3.5" Rubicon Express lift /w 1.25" BL
- 5.38 Yukon gears
- 40" Pro Comp MT2's
- Lot's of extra's
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post #10 of 16 Old 02-24-2015, 08:22 PM Thread Starter
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Quote:
Originally Posted by da20captain View Post
If it is your exhaust it will not duplicate idling in park. Maybe try and and apply some gas in park to see if you hear the rattle then. This is how I diagnosed my exhaust rattle. Annoying as shit. And would only do it taking off or accelerating. Took it to an exhaust shop and they made an adjustment. No longer have issue. Good luck
i'm thinking it might be something in my exhaust. it almost feels like when you start to take off with knobby mud tires and you can feel the knobs of the tires hitting the pavement but it only last a second and then quits. like I previously said, it has done this through 2 different sets of tires (AT's and MT's) so I have ruled tire vibrations out. you can just barely feel it but you can hear it fairly well.

2011 Wrangler Unlimited Rubicon
- 3.5" Rubicon Express lift /w 1.25" BL
- 5.38 Yukon gears
- 40" Pro Comp MT2's
- Lot's of extra's
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post #11 of 16 Old 02-24-2015, 08:24 PM Thread Starter
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Quote:
Originally Posted by jk_perdido View Post
I had this problem and it was a broken weld on the heat shield. Get underneath it and check all the welds where it connects. I fixed mine with a hose clamp.
most people are suggesting this. I just figured if it was the heat shield it would do it while in park or neutral while hitting the gas but it doesn't. I guess I will investigate this as a possible cause also. exactly where do I need to look while underneath?

2011 Wrangler Unlimited Rubicon
- 3.5" Rubicon Express lift /w 1.25" BL
- 5.38 Yukon gears
- 40" Pro Comp MT2's
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post #12 of 16 Old 02-24-2015, 08:28 PM Thread Starter
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so far the consensus is heat shield or exhaust. on my next couple days off, tomorrow and Thursday I will try to get under my Jeep and look specifically at these two area's weather permitting. thanks for the idea's guys!

2011 Wrangler Unlimited Rubicon
- 3.5" Rubicon Express lift /w 1.25" BL
- 5.38 Yukon gears
- 40" Pro Comp MT2's
- Lot's of extra's
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post #13 of 16 Old 02-25-2015, 11:38 AM
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Do you have D-C drive shafts , if so check centering ball . IIRC Stub had some issues with noise also as you are describing . Good Luck ......regards k.
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post #14 of 16 Old 02-26-2015, 06:30 PM
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Not sure if this is close, but did the 11 Rubicons have that tinfoil little cross bar that my 14 did right under the exhaust up front (I have no idea what Jeep calls that part, just a thin metal bar, not the transmission crossmember and it certainly wouldnt qualify to be called a skid)? I had a similar noise on acceleration. I had clunked that bar on the trail and the exhaust was rattling on it. I solved the problem by getting real skids which removed the bar.

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post #15 of 16 Old 02-26-2015, 07:04 PM
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re:annoying rattle /vibration

before you dig around w/ mechanical components ( & understanding that 'noise from front half of my Jeep ' could encompass a wide range of culprits) , go for a couple of rattles thst I've trouble-shot and that made noise / vibes that you wouldnt expect to be that prominent & were . One i even felt as you mention & was surprising in what it was and what it caused ;
check the heat shield bolts that cover the exhaust manifolds ( for that matter you are gonna wanna lay under / hang over / contort around and check every heatshid by wiggling w/ your hand in as close a manner as can resemble the tone of higher RPMs ....if not a heat shield ( & there's a bunch of those ) , check the steering wheel shaft from where she exits firewall down to the joint that has a bolt and wiggle it well at that bolt in the folding joint beside your brake lines in engine bay.
Next , still not discovered ? I actually had one of the torques-headed bolts on the cowling slightly loose that caused the metal cowling to vibrate at just the right tonal note in the rpm band that drove me bonkers for 6months ...nylon washers behind these took care of that .
Also (I hope you're seeing that there is much troubleshooting and gettin is to your Jeeps crannies to do ) the air vent just between windshield hinge and hood? in the center that allows fresh air in? it has a crosshatched grate of plastic that can rattle even tho that probably wouldn't be felt near your feet....the surprising one I discovered and mentioned was the visor above the driver had a bolt slightly needing torque and the whole assembly was jiggling just ever so slightly, and whn it rattled the A-pillar plastic cover acted the same as a sub woofer tube would and amplified the noise - tightened that and it was gone .
it goes without saying to check that you don't have any loose shackles or bolts or obvious stuff but that should get you hunting it down


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post #16 of 16 Old 03-09-2015, 07:22 PM Thread Starter
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I still haven't pin pointed my rattle yet but it seems to be getting worse. I can duplicate it now by putting my Jeep in drive and holding the brake down while giving it a little bit of gas. it still won't do it in neutral. it's either got to be a heat shield or exhaust because it is doing it with no moving parts (axles, wheels, driveshafts, etc). the rattle still happens when the vehicle is stationary.

2011 Wrangler Unlimited Rubicon
- 3.5" Rubicon Express lift /w 1.25" BL
- 5.38 Yukon gears
- 40" Pro Comp MT2's
- Lot's of extra's

Last edited by CamoCop; 03-09-2015 at 07:25 PM.
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