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post #1 of 11 Old 11-23-2013, 11:20 AM Thread Starter
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Tech help needed.

Well this is one of them have to be hear and hear it to fully understand but I will do my best to explain. Hopefully someone here can offer some pointers.

About 7K miles ago I have 4.88s, ARB lockers, and a Truss system installed. Now at about 15-20 miles per hour I start getting a roaring noise first thought was maybe a wheel bearing but they checked out to appear ok. I did the old jack up one side, push pull test on the 16 and 6 o'clock position of the wheel. The noise tappers off a little but at about 50-55 it comes back and seems louder, if you let off the throttle the noise goes away but the instant you reapply throttle the noise comes back which leads me to think it is not a bearing. Even when coasting downhill the noise is not there till throttle is reapplied.

About 3K miles ago I did put in a K&N filter, I myself am not really a fan of K&N but that was all the store had and I was out of town having no related issues.

Like I said without being here to ride in it and experience/hear it a proper diagnose is almost impossible. But if you have any input please speak up.

Thanks,
James
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post #2 of 11 Old 11-23-2013, 11:27 AM
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Quote:
Originally Posted by HAFICON View Post
Well this is one of them have to be hear and hear it to fully understand but I will do my best to explain. Hopefully someone here can offer some pointers.

About 7K miles ago I have 4.88s, ARB lockers, and a Truss system installed. Now at about 15-20 miles per hour I start getting a roaring noise first thought was maybe a wheel bearing but they checked out to appear ok. I did the old jack up one side, push pull test on the 16 and 6 o'clock position of the wheel. The noise tappers off a little but at about 50-55 it comes back and seems louder, if you let off the throttle the noise goes away but the instant you reapply throttle the noise comes back which leads me to think it is not a bearing. Even when coasting downhill the noise is not there till throttle is reapplied.

About 3K miles ago I did put in a K&N filter, I myself am not really a fan of K&N but that was all the store had and I was out of town having no related issues.

Like I said without being here to ride in it and experience/hear it a proper diagnose is almost impossible. But if you have any input please speak up.

Thanks,
James
This is one of those problems that you'd probably have to GoPro or Contour the drivetrain, record various driving conditions, and see what is going on. Otherwise, you might need to take a few things apart. Starting with pulling the front DS (I assume this is a noise from the front, although you didn't specify) and running it that way to isolate the noise to just the front axle or further back. Probably how I would start.

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post #3 of 11 Old 11-23-2013, 02:48 PM Thread Starter
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Yes it is in the front sorry.

At 10 MPH is sounds like a tire rubbing, I have since determined the other noise is throttle related. When running at any speed and holding light steady pressure the sounds appear if you further depress the accelerator peddle or let off the sounds goes away, once back to that position about 1/4 depressed the sound reappears.

The noise at 10MPH is not a constant noise, it is in and out but non stop if you understand what I'm saying. Going to have to see about mounting a camera see if that will help determine what is going on.

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post #4 of 11 Old 11-23-2013, 03:09 PM
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I have to assume that this is in 2wd that you are hearing the noise? Pulling the DS would at least isolate the noise to the pinion and give you a starting point so you don't chase ghosts in the driveline and associated points of connection. At first you almost made it sound like a dragging caliper, but that wouldn't change much with speed. Sounds rotational based on load, which points towards bearings of some sort.

More info needed -
How many miles on the Jeep, front axle, etc?
Was the noise there BEFORE the regear, locker, and truss?
Does the noise change if you drop into 4wd and lock the front diff?

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post #5 of 11 Old 11-23-2013, 03:57 PM
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check the exhaust manifolds for cracks too and the joint where the pipe connects. Not sure it would cause a roar but its possible its a noise if its only happening on the throttle

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post #6 of 11 Old 11-30-2013, 02:57 PM Thread Starter
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As the noise has gotten a little louder and has started appearing at idle it is suspect to be a power steering pump. It has turned into a very distinct whine. Was doing some reading seems it is not a common thing like the head issue but has been talked about on the forums.
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post #7 of 11 Old 12-01-2013, 05:36 PM
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Remove the serpentine belt, start the engine and verify the noise has gone... if that confirms it (noise is gone with belt off) check the idler pulley, those damn things hate dirt and tend to make noise....
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post #8 of 11 Old 12-02-2013, 03:35 AM
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sounds like a bearing in the front diff
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post #9 of 11 Old 12-02-2013, 10:29 PM
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Quote:
Originally Posted by HAFICON View Post
As the noise has gotten a little louder and has started appearing at idle it is suspect to be a power steering pump. It has turned into a very distinct whine. Was doing some reading seems it is not a common thing like the head issue but has been talked about on the forums.
Check the power steering resistor it has a screen in it and can get plugged and starve the pump.

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post #10 of 11 Old 12-03-2013, 01:05 PM
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Check the power steering resistor it has a screen in it and can get plugged and starve the pump.
I'm thinking that was supposed to be "reservoir?" at first I thought you were making a joke. Then it clicked.

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post #11 of 11 Old 12-20-2013, 07:56 PM Thread Starter
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Check the power steering resistor it has a screen in it and can get plugged and starve the pump.
Power Steering resistor?
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