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Old 02-19-2013, 06:11 PM   #1
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Another Vibration Problem! I Need Help Pease!

I have an 05 4.0 6 speed Wrangler that I love. When I get to 65 mph I get a vibration that's not all in the steering wheel. I hav been on this site and others reading every tthread that I could find to get ideas on how to fix this. In the last 3 months here is a list of what I have done:

Timken unit bearings both L&R
Moog Trackbar
Moog TR & TRE's
Moog Draglink
Moog Sway Bar Endlinks F&R
Moog Sway Bar Bushings
Moog Front LCA, UCA Bushings
Moog Rear UCA & LCA
Moog Upper & Lower Balljoints (Driverside)
Spicer U Joints (Both Axles & Driveshafts)
New Rotors & Pads
New Bridgestone Dueler Revo 2 (31x10.5,Factory Wheels)
Balanced & Aligned 4 Times At Different Shops (Roadforce Balance Last Time 0.0)
Removed Front DS Still Had Vibration
New Motor & Tranny Mounts
Monroe Yellow Shocks (I know not the best)


I am out of ideas of what it could be. I have no lift. My toe-in is set at 1/8" also. Any help would be appreciated, Thanks.

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Old 02-19-2013, 06:38 PM   #2
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Lose a balancing weight off the driveshaft? Bent rim maybe?

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Old 02-19-2013, 06:49 PM   #3
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The vibration is still there when i remove ds. I rotate wheel quite regular and can't seem to tell a difference.
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Old 02-19-2013, 09:05 PM   #4
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What are your DS angles? I know it may sound crazy but I had vibrations in the front right at 55 mph. I replaced my old shocks with new ones and for some reason it went away. Did you have the vibrations before you started replacing everything?
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Old 02-19-2013, 09:24 PM   #5
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Originally Posted by aekey View Post
The vibration is still there when i remove ds. I rotate wheel quite regular and can't seem to tell a difference.
You removed the rear ds as well?
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Old 02-20-2013, 07:29 AM   #6
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Originally Posted by Bigkidneys View Post
What are your DS angles? I know it may sound crazy but I had vibrations in the front right at 55 mph. I replaced my old shocks with new ones and for some reason it went away. Did you have the vibrations before you started replacing everything?
Yes. Thats what started this whole journey. I have not checked my angles. I was thinking that I read if my jeep is not raised then I dont have to worry about DS angle / pinion angle. Is that correct?


I have not removed my rear DS. Can that cause the front to vibrate?
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Old 02-20-2013, 07:55 AM   #7
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Bad ujoints n the rear ds, or bent, out-of-balance, or out-of-phase rear ds will cause vibes. The vibe source from a rear ds may be felt in different ways and seem like the source is somewhere other than the rear ds...
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Old 02-20-2013, 09:01 AM   #8
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I can cruise down the freeway at 70-75 and never feel any vibration, it's only when i get on a stretch of newly pave road that I feel it. The vibration will start as soon as I get to 65 mph. It seamslike when it's really cold out, like this a.m. 25 degrees, it doesnt to to vibrate as bad. It also seems to ride better when I have a full tank of gas.

Does any of that make sense? It doesn't to me. I've wrenched on cars for ever, this jeep is flipping me for a loop.
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Old 02-20-2013, 09:03 AM   #9
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Originally Posted by lynn View Post
Bad ujoints n the rear ds, or bent, out-of-balance, or out-of-phase rear ds will cause vibes. The vibe source from a rear ds may be felt in different ways and seem like the source is somewhere other than the rear ds...
I have changed out all the u joints in the rear ds as well. I have not had it checked for being out of balance.
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Old 02-20-2013, 11:33 AM   #10
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What is the air pressure in your tires?
What brand of tires (and load range) are you running?

ANY road at 65 mph, or only one road in particular and not others at 65 mph ?
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Old 02-20-2013, 01:44 PM   #11
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What is the air pressure in your tires?
What brand of tires (and load range) are you running?

ANY road at 65 mph, or only one road in particular and not others at 65 mph ?
28 psi.

Bridgestone Dueler AT Revo 2 (3 months old) Load Range - 2270 lbs.

We have 2 newly paved roads that I travel on going to work. It will vibrate on both of them. Understand that the freeways and other roads are not in very good shape here in Alabama. They may be masking the vibration. It may be that I just happen to feel it on the fresh pavement.
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Old 02-20-2013, 01:54 PM   #12
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Sometimes I feel vibes on fresh pavement/newly installed macadam.
It's the only place I get those vibes; it's definitely the result of variations in the new road surface cause by the machine that applies the macadam and/or the rollers that compress the macadam.

Try to find some good road that has some age to it, and compare. Your vibes could simply be from the variations in the new road surface.

Good luck !!
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Old 02-20-2013, 02:07 PM   #13
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Thanks I'll try some other roads out.
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Old 02-25-2013, 11:16 PM   #14
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Quote:
Originally Posted by aekey
Thanks I'll try some other roads out.
Sooooooo
What did you find out?
Any answer to your problem?
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Old 02-27-2013, 07:00 AM   #15
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Nothing yet. I am still working on it. I am going to do a lot of measuring around the frame to make sure suspension is square. I am still at a loss on it.
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Old 03-14-2013, 07:56 AM   #16
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Update! I increased my tire pressure to 36 psi and had no vibrations!!! Here is a recap of what has been done:

Timken Unit Bearing (L&R)
Moog Trackbar (Front & Rear)
Moog TR & TRE's
Moog Draglink
Moog Sway Bar Endlinks (Front & Rear)
Moog Sway Bar Bushings (Front & Rear)
Moog Front LCA, UCA Bushings
Moog Rear UCA & LCA
Moog Upper & Lower Balljoints (Driverside)
Spicer U Joints (Every U-Joint Changed)
New Rotors & Pads
New Bridgestone Dueler Revo 2 (31x10.5,Factory Wheels)
Balanced & Aligned 4 Times At Different Shops (Roadforce Balance Last Time 0.0)
Removed Front DS Still Had Vibration
New Motor & Tranny Mounts
Monroe Yellow Shocks (I know not the best)

All of this and it ended up being the stupid tire pressure. I have never had to go up so high on tire pressure. Oh well, should be in good shape for a while.
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Old 03-14-2013, 09:40 AM   #17
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You shouldn't have to run tires at 36. There is probably uneven wear on one (or more) of your tires that is being bridged by the the high pressure.
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Old 03-14-2013, 10:33 AM   #18
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My thoughts exactly, but the tires only have about 5000 miles on them. They have been rotated 4 times because I was kept thinking it was a balancing issue so I would take it to different shops and have them rotated and balanced. The last time it was Roadforce balanced and had 0.0.

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