Pulsing Vibe from 50-60 mpg - JeepForum.com
 
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post #1 of 11 Old 12-03-2009, 02:08 PM Thread Starter
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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post #2 of 11 Old 12-03-2009, 02:14 PM
mdm
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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.

Keep in mind that free advice can frequently be worth less than you pay for it.
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post #3 of 11 Old 12-03-2009, 04:51 PM Thread Starter
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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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post #4 of 11 Old 12-03-2009, 04:59 PM
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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

Last edited by 2006_Sport; 12-03-2009 at 05:14 PM.
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post #5 of 11 Old 12-03-2009, 05:33 PM
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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.

OlllllllO
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post #6 of 11 Old 12-03-2009, 05:36 PM
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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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post #7 of 11 Old 12-03-2009, 05:44 PM
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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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post #8 of 11 Old 12-03-2009, 10:09 PM Thread Starter
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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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post #9 of 11 Old 12-03-2009, 10:10 PM Thread Starter
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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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post #10 of 11 Old 12-03-2009, 10:15 PM
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Originally Posted by missionAvs View Post
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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post #11 of 11 Old 12-03-2009, 11:01 PM Thread Starter
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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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