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Old 11-11-2019, 09:41 AM
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Strange vibration while driving

I have a strange vibration while driving along with a rumbling type sound. It almost feels and kind of sounds as if I am driving down a gravel road. Jeep just got inspected and everything checked out for safety inspection. It is more noticeable at speeds above 30mph. Any suggestions on where I should start troubleshooting? As always thanks for any advice or suggestions.

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Old 11-11-2019, 09:49 AM   #2
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I too am experiencing this. You didn't give a description of your vehicle- mine is a 2001 Wrangler 4.0L 6cyl with 250k miles.


I've heard wild theories ranging from axles to differentials to (gulp) the long block. I'd be curious as to what the WF gurus think.



To be more clear on the sound: it is a guttural, warbling oscillation in the lower frequency band that does not resonate on a frequency consistent with RPM or MPH. It does increase frequency when accelerating, then blends into background air noise around 50MPH. The frequency at 30MPH is around 1.5HZ and speeds up with acceleration to around 3-4 Hz. If Jeeps were aerodynamic at all, you probably would still hear it, however since Jeeps were designed to have the aerodynamics of a brick wall, it's impossible to hear anything above 45 MPH.
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Old 11-11-2019, 09:59 AM
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My jeep is a 1997 with a 4 popper that has a repalcement engine installed with about 130k on it. I can feel the rumbling through the steering wheel and even though the seat.
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Old 11-11-2019, 02:09 PM   #4
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Last time you had tires balanced?
Is the Jeep lifted?
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Old 11-11-2019, 04:19 PM
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Re-Balanced about two years ago when troubleshooting death wobble issue.
Jeep has a 3 inch suspension lift.
Just started earlier this year.
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Old 11-11-2019, 06:11 PM   #6
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I had a vibration like that, drove me crazy trying to find it, turned out my front drive shaft was out of balance. I only found it because I had pulled the front DS to service it and had to drive to the parts store for grease and with the DS out, the vibe was gone. My suggestion is to pull your drive shafts one at a time and go for a drive and see if the vibe goes away.
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Old 11-12-2019, 08:47 AM   #7
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Since it's free, I'd do as suggested above, might be a failing u joint in drive shaft. But 2 years is a long time to go between balance and rotate.
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Old 11-12-2019, 07:47 PM   #8
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That sounds serious.. and how can you go for a DRIVE after removing the DRIVE SHAFTS? I'm all kinds of confused. Do you mean the Sway bar or the track bar, or the drag link... don't the drive shafts transfer power from the engine to the wheels somehow? How can you drive after removing them? Unless you can put it in 4WD and then you're only pulling 2 without the shafts? I don't know what I'm talking about
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Old 11-12-2019, 08:28 PM   #9
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Quote:
Originally Posted by squishy2001 View Post
That sounds serious.. and how can you go for a DRIVE after removing the DRIVE SHAFTS? I'm all kinds of confused. Do you mean the Sway bar or the track bar, or the drag link... don't the drive shafts transfer power from the engine to the wheels somehow? How can you drive after removing them? Unless you can put it in 4WD and then you're only pulling 2 without the shafts? I don't know what I'm talking about

Remove One at a time....
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