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  #37  
Old 08-09-2012, 05:21 PM
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Re: Wk2 Rear Knocking Noise Aussie GC Laredo

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Originally Posted by JRNYC View Post
from what we know they are working on the fix. I am bringing mine in Monday 8/6 and I will update you as to what I was told etc etc.
Any updates??
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  #38  
Old 08-09-2012, 08:43 PM
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Re: Wk2 Rear Knocking Noise Aussie GC Laredo

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Originally Posted by Billx4 View Post
I've had my wk2 for 6 days and already noticed the clunking sound. I guess I'll swing by the service department on Monday and see what they say about it.
After doing more research, I decided not to bother with what appears to be a futile effort. The Nivomat load leveling shocks are the culprit and we WK2 owners aren't the only ones with the problem. These same shocks are used on othe vehicles and as far as i can tell, they all make the same clunking sound. It also seems that the sound has gone away, for now.
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  #39  
Old 08-09-2012, 09:00 PM
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Re: Wk2 Rear Knocking Noise Aussie GC Laredo

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Originally Posted by Billx4 View Post
After doing more research, I decided not to bother with what appears to be a futile effort. The Nivomat load leveling shocks are the culprit and we WK2 owners aren't the only ones with the problem. These same shocks are used on othe vehicles and as far as i can tell, they all make the same clunking sound. It also seems that the sound has gone away, for now.
Could you give me some sources? I did an extensive research too, and found a lot of issues with the Nivomat but most customers complained about noise based on high milages, or the Nivomats have been worn out, defect or were just expensive.
I haven't found any source talking about new Nivomats making a clunking noise in the sense of normal operation.

I know that the internet provides billions of information and I might have overlooked it, so some sources for your statement would help me further. Thanks a lot
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  #40  
Old 08-13-2012, 06:59 AM
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Re: Wk2 Rear Knocking Noise Aussie GC Laredo

I didn't find any one piece of definitive information. I just came to my own conclusion based upon numerous threads I found through various google searches. The common theme seemed to be the Nivomats. Chrylser, Cadillac, Volvo and Mercedes (others???) use Nivomat load leveling shocks and there seems to be a common complaint of a "clunk" coming from the rear of vehicles that have them.
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  #41  
Old 08-13-2012, 07:24 AM
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Re: Wk2 Rear Knocking Noise Aussie GC Laredo

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Originally Posted by nonopr01 View Post
Any updates??
Sorry,

My dealerships mechanic did not hear the clunk.
( among other issues he did not find/working as designed )

Will keep you posted in my List of overland summit issues thread as sson as the remedy is finished. I am still confident I will have a happy resolution and a working Jeep.
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  #42  
Old 08-14-2012, 05:56 PM
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Re: Wk2 Rear Knocking Noise Aussie GC Laredo

I had the oppertunity to load my GC with stuff. Initially it had a sag, but after some driving it went up. So the leveling worked quite well.
However, the rattling/clunking was unchanged. It wasn't less, not quieter, not louder and not more. It was simply the same.
Taking the statement that the reason are the self leveling shocks because they are to short for granted, shouldn't the noise behavior change with amount of weight in the back putting more force on the shocks?
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  #43  
Old 08-14-2012, 10:56 PM
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Re: Wk2 Rear Knocking Noise Aussie GC Laredo

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Originally Posted by Suther View Post
Some news,
Received a call back from Chrysler Case Manager. He explained to me that the problem is well known within Chrysler, that they are working on a fix which will come soon. Three major things he stated:
1) The car is safe to drive and no follow on damage to be expected.
2) Reason for the clunking noise with the self-leveling shocks is, that the shocks are too short.
3) All owners of GCs with self leveling shocks will be informed when the fix is available. Definitly those who made a complain to their dealership.

Not sure how too short shocks actually can cause this, but the case manager seemed to be well educated on the matter so I feel well treated and informed. Just hoping they bring out the fix fast.
Thank you for the update! I definitely want this fixed as well.
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  #44  
Old 08-14-2012, 11:12 PM
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Just a couple of questions
1 if the load leveling shocks are too short, how would this create the noise when the vehicle unladen, where the shock is in its centre position?
2 if the shock is too short it would restrict down wards wheel travel, and the noise would occur when at full articulation, which it not, it occurs in the centre/ normal ride position?
This statement about the noise being caused by the shock being too short is BS, it's just a dealer making s&!t up because he has know idea
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  #45  
Old 08-15-2012, 08:19 AM
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Re: Wk2 Rear Knocking Noise Aussie GC Laredo

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Originally Posted by yoda42 View Post
Just a couple of questions
1 if the load leveling shocks are too short, how would this create the noise when the vehicle unladen, where the shock is in its centre position?
2 if the shock is too short it would restrict down wards wheel travel, and the noise would occur when at full articulation, which it not, it occurs in the centre/ normal ride position?
This statement about the noise being caused by the shock being too short is BS, it's just a dealer making s&!t up because he has know idea

It kind of makes sense to me. I notice on mine the clunk doesn't happen on compression but on rebound. If the shock were too short then it would not have enough room to travel on rebound (when it's stretched out) and top out causing a noise. I'm not a mechanical engineer but it seems like a reasonable explanation.

Also, under load when I'm towing I never notice it and my suspension rides so much smoother. This would support the above theory because under load the shock would not rebound as far and hence no noise.
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  #46  
Old 08-15-2012, 04:14 PM
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Re: Wk2 Rear Knocking Noise Aussie GC Laredo

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Originally Posted by yoda42 View Post
Just a couple of questions
1 if the load leveling shocks are too short, how would this create the noise when the vehicle unladen, where the shock is in its centre position?
2 if the shock is too short it would restrict down wards wheel travel, and the noise would occur when at full articulation, which it not, it occurs in the centre/ normal ride position?
This statement about the noise being caused by the shock being too short is BS, it's just a dealer making s&!t up because he has know idea
Honestly, I wonder myself how and what can cause the noise on shocks that are too short. However, have you actually looked at the rear suspension? There are so many moving parts, bushings, links plus the flexible mounting of the cradle that anything can cause this noise. So I can understand that it takes a lot of time to investigate this issue and it might well be that shocks that are too short cause this.

Just to be clear in this, the information that the self leveling shocks are too short came from Chrysler directly as the technician called me back. The dealer just stated that Chrysler knows about this clunking and is working on it. So I called Chrysler and they promised to call back when they have more detail. So did they, took a couple of days but I finally got it.

Nevertheless, like I every telephone game there could be some misunderstanding even on my side
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  #47  
Old 08-15-2012, 07:29 PM
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The noise accrues on the black top, unless you are on the worst roads in the world or hitting a speed bump at 80 you will not top out this suspension, if you where the car would be bouncing all over the road, jack your car up and see how much wheel travel you have, this noise comes from minor road defects not major suspension travel, it is the sharp quick movements that cause the rattle/clunk
I have had my rear shocks replaced twice and the noise returns after about 300km on the new shocks
As an ex-mechanic I will state that it is not the shock coming to the end of its travel top or bottom making this noise, it is a problem with the internal valveing of the shock not the length
And yes I have had a very good look at the suspension, I have a 50mm lift that I installed my self
If this rattle/clunk was caused by the shock being to short it would be noticed more off road, I have had our GC off road many times and the noise does not occur when articulating the suspension off road, only on the black top with minor road imperfections where the suspension does not work through its full range of travel
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  #48  
Old 08-16-2012, 07:17 AM
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Quote:
Originally Posted by Billx4 View Post
I didn't find any one piece of definitive information. I just came to my own conclusion based upon numerous threads I found through various google searches. The common theme seemed to be the Nivomats. Chrylser, Cadillac, Volvo and Mercedes (others???) use Nivomat load leveling shocks and there seems to be a common complaint of a "clunk" coming from the rear of vehicles that have them.

Thanks for your research. I found a lot of threads on the clunking Nivomats also, but they were always talking about older ones with tens of thousands miles on it. So they were worn out or damaged and they wanted to replace them and were surprised they didn't have standard shocks and how expensive they were.

I haven't found one thread talking about new and functioning Nivomats doing this clunking other than in the WK2.
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