Shake/Vibration 80mph+ - JKowners.com : Jeep Wrangler JK Forum
 
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post #1 of 11 Old 02-26-2012, 10:06 PM Thread Starter
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Question Shake/Vibration 80mph+

Ive noticed a shake/vibration/wobble kinda thing happening around 80mph+ speeds. I have recently installed 4.88 gears. Could it be related?
The shake/vibration/wobble thing is felt through the body of the jeep. Steering wheel is very stable and does not shake or vibrate at all. I'm thinking one of the drive shafts has something wrong in it? Oh the vibration is intermittent. When at 80mph+ speeds you can feel the vibration coming and going, like on for a few seconds, then off for few seconds. Stays that way until i reduce speeds. Thx!

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Last edited by Rafic; 02-26-2012 at 10:10 PM.
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post #2 of 11 Old 02-26-2012, 11:16 PM
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harmonics of the jeep? drive slower? thats all i have

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post #3 of 11 Old 02-27-2012, 01:29 AM
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Originally Posted by leman View Post
harmonics of the jeep? drive slower? thats all i have
No way, I rock 80 on the hwy with my rig all the time with no issues. Odd that you don't feel it through the wheel. I'm just guessing here, but I doubt its a drive shafts. If they are out of balance you'd have felt that at a much slower speed. And no way is it the regear. Might have the tires looked at. That's my best advice.

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Last edited by TEXASKEV; 02-27-2012 at 01:33 AM.
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post #4 of 11 Old 02-27-2012, 07:42 AM
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Originally Posted by TEXASKEV View Post
No way, I rock 80 on the hwy with my rig all the time with no issues. Odd that you don't feel it through the wheel. I'm just guessing here, but I doubt its a drive shafts. If they are out of balance you'd have felt that at a much slower speed. And no way is it the regear. Might have the tires looked at. That's my best advice.
Yeah, I roll around at 80 too. Mine shakes some at that speed. Definitely feels like tires or something to that effect. Not DS's at all. All the rubber I have taken off of these tires and not had them balanced, Im sure thats what the issue is, but Im too lazy to get it taken care of.


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post #5 of 11 Old 02-27-2012, 12:53 PM
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There is so many silly little things that could contribute to the cause of this "vibration/wobble". Could be tires as stated above, maybe unit bearings or pinion bearings. Does the sound or vibration come from the front or the rear? What suspension and tires are you running?

EDIT: I saw the answer to the lift and tires in your sig after I wrote this. I still say check the easy and inexpensive things first like tires and work your way from there checking anything and everything that could possibly cause the condition you describe.

Jersey

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post #6 of 11 Old 02-27-2012, 01:08 PM
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I'm bettin' on tires, too, since this sounds just like what I'm going through. Try getting the tires balanced/checked.


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post #7 of 11 Old 02-27-2012, 03:22 PM
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Slow down, it'll all go away. Thanks.

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post #8 of 11 Old 02-27-2012, 04:58 PM
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i had a vibration on mine at 80 mph too, re balanced the drive shafts, and that was the end of it.

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post #9 of 11 Old 02-27-2012, 05:03 PM
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The driveshaft is spinning significantly faster with your new gear ratio, it may need to be rebalanced...

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post #10 of 11 Old 02-27-2012, 05:04 PM
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Check your rotors too. Last wheelin trip I was on, one of my calipers siezed shut. Was pulling left like a bitch. Once I got it unstuck (poured water on it. Worked like a charm) I found my feont end was vibrating like crazy around 75-80mph.

Pretty sure my rotor on that side is prolly warped. Could be something to look into. Or, maybe having one wheel braking for so long caused uneven wear to the point they're no longer balance.




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post #11 of 11 Old 02-27-2012, 10:25 PM Thread Starter
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Thank you all for the input and ideas, I took the JK to the dealership yesterday to have my diff oils changes after the run in period of the new rings & pinions. We noticed a small oil leak coming out from the front drive shaft right where it goes into the diff. So that is on the list of fixes. Tires and wheels are brand new and have just been balanced, so I dont think its the tires but I will rebalance them just to be sure. I have searched on the forum for similar issues, and the driveshaft balancing seems to be a viable culprit as well as having the retaining clips removed from the wheel bolts/rotors when installing aftermarket wheels. I believe these are still on the Jeep. I will tackel all these issues today and see how things go.

Cheers!

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