Bad vibes over 50 mph

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May 20, 2012 | 01:00 PM
  #16  
Quote: Ok have you checked your Harmonic Balancer? If the rubber is coming out of the balance or is missing this will cause a vibration at speed. Just replace one for a customer and it fixed his issue with vibration. Try that and the Brown Bag set up is nice installed some pretty clean set up. But check that
Thanks for the idea, I'll make sure I check that first things today.
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May 20, 2012 | 03:23 PM
  #17  
No problem let me know if that helped your XJ.
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May 30, 2012 | 12:04 PM
  #18  
Anything?
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May 31, 2012 | 09:22 AM
  #19  
I am out of state working for the summer, so I don't have time to go over the jeep. But since I am coming into money I am just letting parts accumulate. I'm going to change out all the suggested parts. I have already ordered the motor mounts from brown dog and they're being fabbed as we speak. Next pay check is going to be for new hub assemblies, and transmission mount. And as the summer goes a new harmonic balancer, check the geometry of the drive shafts, and correct accordingly and possibly a balance of the shafts. And for kicks and giggles I'll rotate the tires and have them rebalanced. All this needs to be or will need to be done soon, so I figured why not, seems how it is my daily driver it needs to get me around reliably.
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May 31, 2012 | 06:08 PM
  #20  
Sweet do one thing at a time so you find 100% what it was/is, that way other people will have there answer (hopefully)
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May 31, 2012 | 07:52 PM
  #21  
Needs to be flush at crank, other wise it will eat up seal and wear into crank gear for timing. And I dont think its thread jacking no worries
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May 31, 2012 | 07:55 PM
  #22  
Quote: Sorry, not trying to THREAD JACK here but i am replacing my harmonic balancer, i used an install tool, it seemed that i couldnt get any more turns out of it and it appears to be seated against the back, but the hub of the balancer is a touch past the face of the crank (where the bolt goes) is this okay or does the hub need to be flush with the face surface of the crank??

Read last post Garb Man
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Sep 18, 2012 | 11:38 PM
  #23  
Its been a long while, but I have since been able to do the majority of the repairs and well.......I'm still getting vibrations. I first swapped out the motor mounts and tranny mount, drove it for awhile hoping once the mounts broke in the vibes would go away, only some of the vibes went away. I then replaced both hub assemblies and drove around for awhile, I was able to eliminate the vibes at slower speeds and get rid of a low growling sound at higher speeds. I have rebuilt the u-joints on both drive shafts as well. So as of today I am getting some semi bad vibes when the jeep gets over 50 mph and it kicks into overdrive. Then when I let off the gas and coast the vibes get even worse.
I checked the harmonic balancer and its not cracked and the rubber isn't working its way out, I checked my pinion angle, with a cv drive shaft it should be parallel, and its maybe a hair past parallel, I haven't replaced the axle u-joints for a long time, how ever would those contribute to vibes? I recall them making clunking sounds when the go bad? I am running out of ideas, the only others is a bad pinion bearing which with plans to regear soon I don't want to really deal with until then or a bearing in the t-case. I am not about to give up but any ideas would be very helpful
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Sep 19, 2012 | 01:36 PM
  #24  
Yes axle shaft u joints can cause vibrations. Also have someone drive behind / next to you and see if there's something shaking violently.
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