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-   -   intermittent rub / moan upon accelerating from a stop or <5mph (http://www.jeepgarage.org/f107/intermittent-rub-moan-upon-accelerating-from-a-stop-or-5mph-28887.html)

bbpink 09-22-2011 11:31 PM

intermittent rub / moan upon accelerating from a stop or <5mph
 
I have a intermittent rubbing noise that is slight but can be heard with a/c on and low radio volume that lasts less then 2 seconds and that I think is coming from the drive train.

I saw some pretty extensive remarks about a moaning / rubbing noise while braking at ~5mph but my issue happens when starting from either a stop or rolling slowly. I do not seem to have any unusual noise when braking.

I have a JGC Laredo 3.6L 4x4 QTII with about 650miles on the odo. It is a fairly early 11/2010 build bought from a low volume dealer about 3-weeks ago. Since its slight and only happens about 1/5 starts, I am not sure I want to bring it to the part monkey's at the dealer yet and play pick a part or 'can't replicate', any ideas of what it could be or has anyone had a similar issue/experience?

Besides the noise, I do not see any performance issues, I am more worried about reliability(thus I may just sit back and rely on the PT warranty) and cause. Also, I have the factory tow package with the load-leveling shocks, which seem to be excluded from TSBs about a similar issue. Double also, I checked the spare and its tight in the cargo bay.

jp467 09-22-2011 11:56 PM

Re: intermittent rub / moan upon accelerating from a stop or <5mph
 
I had a 2011 Limited 3.6 with QTII with this problem. It was built sept 2010. When rolling at 5 mph it would make this rubbing noise and sometimes on the takeoff it would make it for a second as it passed through that speed of 5 mph. I spent 3 months back and forth to the dealer with this. At one point it was there for 3 weeks. They replaced the rear Diff and axle shaft the rear brakes, driveshaft and rear wheel bearings and finally the transfer case which turned out to be where it was coming from. Two weeks after it was finally fixed I got rid of it for a 2011 Overland. There have been others that have posted on here with the same issue and the transfer case seems to be where the noise comes from. If your is a early build I would make sure it has all the software updates your performance will be alot better.

Kevlars 09-23-2011 12:00 AM

Re: intermittent rub / moan upon accelerating from a stop or <5mph
 
The Overland that you purchased -- did you get the 3.6 or Hemi?

bbpink 09-23-2011 12:04 AM

Re: intermittent rub / moan upon accelerating from a stop or <5mph
 
JP467, so if I was to roll at a constant 5mph and had a similar issue, I should hear the rubbing for longer then a second or two? Would it be continuous? Did it happen every time?

jp467 09-23-2011 12:58 AM

Re: intermittent rub / moan upon accelerating from a stop or <5mph
 
Quote:

Originally Posted by Kevlars (Post 488847)
The Overland that you purchased -- did you get the 3.6 or Hemi?


I got the Hemi.

jp467 09-23-2011 01:04 AM

Re: intermittent rub / moan upon accelerating from a stop or <5mph
 
Quote:

Originally Posted by bbpink (Post 488850)
JP467, so if I was to roll at a constant 5mph and had a similar issue, I should hear the rubbing for longer then a second or two? Would it be continuous? Did it happen every time?

It only made the noise at 5 mph so if I would take up to 8 or 9 mph and then just let it roll it would make the noise as soon as it hit 5 and would only last a couple seconds until it dropped below that. If I were to touch the gas it would stop. It did not do it all the time but if was quite often I would notice it a lot in stop and go traffic and parking lots. Then other time it would make the noise real quick when accelerating from a stop also at 5 mph just for a second as it passed through that speed.

bbpink 09-23-2011 01:16 AM

Re: intermittent rub / moan upon accelerating from a stop or <5mph
 
Was there ever determined to be an actual faulty piece in the transfer case that could cause a performance failure or was it just a noisy unit?

How many miles did you put on with the noise before getting the drive train components changed out?

Thanks.

jeepin4ever 09-23-2011 09:57 AM

Re: intermittent rub / moan upon accelerating from a stop or <5mph
 
I had the noise in my November Build 2011 Overland with the V6 and Quadra Trac II. Only at 5mph. The transfer case was replaced, which led to more driveshaft problems and vibrations. The noise was diminished but still very much there. I was told after that it was normal by a Field Engineer. I test drove another 2011 built in May and it did not do the same rubbing noise. I was told Jeep was releasing a statement that the noise was normal and it was the electronics doing a torque sensing test. I find it unacceptable on a 40k+ vehicle.

jp467 09-23-2011 11:53 AM

Re: intermittent rub / moan upon accelerating from a stop or <5mph
 
Quote:

Originally Posted by bbpink (Post 488865)
Was there ever determined to be an actual faulty piece in the transfer case that could cause a performance failure or was it just a noisy unit?

How many miles did you put on with the noise before getting the drive train components changed out?

Thanks.


The noise was there from day 1 but I first took it in at about 4000 miles. The dealer could not find the noise and after replacing several parts chrysler sent out a couple field engineers that used some sound listening equipment to find the noise. They replaced the whole transfer case with a new unit and the noise was gone. Then I had a vibration in the drivetrain after the repair I took it back and they replaced one of the driveshafts. The frist time I took it in for the problem was Nov and it was march by the time it was fixed. I decided I was not keeping it because of all the work that had been done on it and 2 weeks later I got an Overland with the Hemi.

jp467 09-23-2011 12:02 PM

Re: intermittent rub / moan upon accelerating from a stop or <5mph
 
Quote:

Originally Posted by jeepin4ever (Post 488985)
I had the noise in my November Build 2011 Overland with the V6 and Quadra Trac II. Only at 5mph. The transfer case was replaced, which led to more driveshaft problems and vibrations. The noise was diminished but still very much there. I was told after that it was normal by a Field Engineer. I test drove another 2011 built in May and it did not do the same rubbing noise. I was told Jeep was releasing a statement that the noise was normal and it was the electronics doing a torque sensing test. I find it unacceptable on a 40k+ vehicle.


If it is a normal type noise I think mine was louder than others because I drove a couple where I didn't hear the noise. If it is normal Jeep should have put the statement out over a year ago instead of having customers in the shop having half the drivetrain replaced.

bbpink 09-23-2011 12:38 PM

Re: intermittent rub / moan upon accelerating from a stop or <5mph
 
After taking it out again, I hear the droning that occurs when rolling down through 5 mph but I have to have the windows down. I think I agree that it is related to the quick noise that occurs when accerlating through 5mph. I am unsure what to do next.. As I said the main problem I have is when starting I can hear and kinda feel this low-fequency rub intermittently even in moderatly loud situations.

As a side note, I took the jeep to a dirt lot and put the QTII through all it settings with no issue, except a clunk / loud ping that occurs when going into 4wd low. This seems normal, right?

jp467 09-23-2011 04:13 PM

Re: intermittent rub / moan upon accelerating from a stop or <5mph
 
Yes a clunk when going into 4 low is normal. As far as the noise on mine I was able to hear it with the windows up. It only lasted for a couple seconds at 5 mph but was enough that other people in the car with me would ask what was that noise. If you are dealing with a low volume dealer they may or may not have worked on this issue. You could take it in and have them contact the STAR engineering team and see if they can figure out if the noise is within normal limits.


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