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Unread 12-03-2009, 02:08 PM   #1
missionAvs
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Pulsing Vibe from 50-60 mpg

I have a pulsing vibe that appeared a few months ago and just won't go away. I have read imped's thread and the symptoms seem to be similar to his vibes. For some reason, however, if I turn the OD off then the vibes go completely away which leads me to believe that it is different. Any thoughts as to what I should look at first? I've already checked, and rechecked the pinion angle and CA bushings and all seem to be in good order.

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Unread 12-03-2009, 02:14 PM   #2
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Do you have a transfer case drop, MML, or SYE/CV drive shaft?

Remove the rear drive shaft and drive in 4HI to see if the vibration is still there.
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Unread 12-03-2009, 04:51 PM   #3
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Quote:
Originally Posted by mdm View Post
Do you have a transfer case drop, MML, or SYE/CV drive shaft?

Remove the rear drive shaft and drive in 4HI to see if the vibration is still there.
No tcase drop but I do have an SYE/CV drive shaft. I'll try removing the drive shaft tomorrow.
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Unread 12-03-2009, 04:59 PM   #4
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Here is your answer

I have the same issue even after a inch t case drop and a 2.5 inch suspension lift. Read posts 13 and 20. It has to do with the Jeeps skid plate and firing order when OD is engaged.
http://www.jeepforum.com/forum/f9/ha...8/#post5970075
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Unread 12-03-2009, 05:33 PM   #5
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If you have an auto, I'd bet that's it. BTW, I fixed all vibes. Earlier this week, I got the jeep up to 100 (yes, 100) mph on a back road with no wobbles or vibes. It felt rock solid....even with my hands off the steering wheel.
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Unread 12-03-2009, 05:36 PM   #6
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You crazy mofo!!!!!!!!!! 100 on 35s Although that's awesome you ditched the vibes man...good job!
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Unread 12-03-2009, 05:44 PM   #7
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You crazy mofo!!!!!!!!!! 100 on 35s Although that's awesome you ditched the vibes man...good job!
I thought you knew. I made a thread about it a while back and was helping people through their vibes. So you can call me the vibe guru..... It was just a loose rear output nut causing the rear output yoke to move ever so slightly. I couldn't move it with my bare hands nor could I tell the nut was loose until I got a wrench on it. I actually went to remove it to replace the rear output seal (killed by the vibes) and when I went to loosen it (preparing to have to hang on the wrench), it instantly loosened with no real effort. So I said AHHHHHHHHHHH!!!!!!! Tightened her to 180 ft lbs, went for a drive and no vibes. And yeah, 100mph was actually quite civilized. Well built jeeps will do just fine at higher speeds.... (besides the single digit mpg's). I usually don't go faster than 65 but decided to see how she would do. No worries safety freaks, I was on a wide open highway with a couple miles of open road late at night.
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Unread 12-03-2009, 10:09 PM   #8
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Quote:
Originally Posted by 2006sport View Post
Here is your answer

I have the same issue even after a inch t case drop and a 2.5 inch suspension lift. Read posts 13 and 20. It has to do with the Jeeps skid plate and firing order when OD is engaged.
http://www.jeepforum.com/forum/f9/ha...8/#post5970075
Wow sounds exactly like my issue, didn't even think to blame it on the skid plate. O well, guess its time for a new skid . Thanks for the help guys!
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Unread 12-03-2009, 10:10 PM   #9
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Quote:
Originally Posted by imped4now View Post
If you have an auto, I'd bet that's it. BTW, I fixed all vibes. Earlier this week, I got the jeep up to 100 (yes, 100) mph on a back road with no wobbles or vibes. It felt rock solid....even with my hands off the steering wheel.
Congrats on fixing your vibes man!!
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Unread 12-03-2009, 10:15 PM   #10
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Wow sounds exactly like my issue, didn't even think to blame it on the skid plate. O well, guess its time for a new skid . Thanks for the help guys!
can you say Rokmen?

I couldnt believe it either. But im glad its that and not something else you know?
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Unread 12-03-2009, 11:01 PM   #11
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Quote:
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can you say Rokmen?

I couldnt believe it either. But im glad its that and not something else you know?
I hear you man. I have been stumped by these vibes for a little while now and to know that its the skid plate really makes me feel more at ease.
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