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  #253  
Old 03-31-2014, 08:47 PM
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Re: Wk2 Rear Knocking Noise Aussie GC Laredo

Quote:
Originally Posted by gazzzzzza1 View Post
Hi Anarawa9

My jeep has load levelling suspension, I did not know that quadra lift suspension has a similar problem. I checked out dobinsons prings link, but their site indicated that towing capacity with their products dropped back to 2500kg - too low for us.

The "walkaround on Edmunds" link was interesting but seemed to only concentrate on the front suspension.

As mentioned earlier, I test drove a 2012 JGC with 30000km & a lot of towing. Still has orig rear shockers but virtually no noise. Now suspect jeep has a fix for our problem, but not fixing older jeeps - maybe fixed a mismatch between rear springs & shockers
Gazzzzzza1,

"walkaround on Edmunds" was interesting, keen to know what shocks they are using. If you look closely they have got Bilsteins on the rear as well. I was on the Bilstein Australia website. Apparently, they will custom make any shock absorber. I do not know whether that statement holds true for Jeeps. Custom make = $$$$$$.

Right now warranty is your main issue. If you go over your warranty period which ends in November Jeep will charge you an arm and a leg. Are you able to buy extended warranty? That is the thing I do not get as well, some Jeeps do not clunk and some do. It definitely wreaks bad batch parts from OEM.

Somewhere someone was talking about Bilstein 5100 series ride height shocks. I do not know if they will fit. Best bet is if you have any old OEM shocks lying around, is to go to a Bilstein dealer and see if they match up. If the top/lower mounting matches up it would be a good resolution but otherwise its back to square one. I know it is a lot of running around but if Jeep cannot find a solution I guess we all have too. I am going to pull mine off over the weekend to measure up the dimensions.

Yeah, most Quadra lifts have got them too, they clunk and rattle. I have an airbag damper where the spring would normally be and the shock is mounted from the the chasis to the suspension without spring. (no coil overs)

I spoke to Monroe Australia about the 911304 shocks, they are not available locally in Australia. If you don't want to pay freight charges they will order it in for you, but there is approximately 12 week wait. Those shocks will not lower the towing capability according to Monroe. Also, they are Monroe's own design and not based on the OEM internals.

I am not sure how your load leveling shock mount is at the bottom. Are they clevis type or eye type?

If you can, get in touch with Dobinsons, I am sure they will be keen to help. They want to try out a new type of shocks they are making which has a possible fix for the rattle /clunk. But needs 6 months or so of testing.

Meanwhile here are the Bilstein;

5100 series
Part Number: 24-187367
Part Number: 24-186988

4600 series
Part Number: 24-186261
Part Number: 24-187343

If Jeep do not sort this out, this will be my last JGC, its a shame because they are a nice vehicle otherwise.
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  #254  
Old 03-31-2014, 09:02 PM
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Re: Wk2 Rear Knocking Noise Aussie GC Laredo

thanks!!! a lot to take in!
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  #255  
Old 03-31-2014, 10:05 PM
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Re: Wk2 Rear Knocking Noise Aussie GC Laredo

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Originally Posted by anaraya9 View Post
Gazzzzzza1,

Yeah, most Quadra lifts have got them too, they clunk and rattle. I have an airbag damper where the spring would normally be and the shock is mounted from the the chasis to the suspension without spring. (no coil overs).
You might be confusing two issues. This thread is about knocking experienced by owners of GCs with steel suspensions that have self-leveling shocks. All Aussie steel suspensions have self-leveling shocks. I'm not sure that this is the case in the States. Quadra-lift cars can also knock but for an entirely different reason. GCs have a fully independent suspension. This limits suspension travel compared to older fourbies with live axles. When traveling at normal ride height the suspension has roughly the same travel up as down. However, when set at OR1 and particularly OR2, the car has a lot of travel up but little down. So when traveling at anything over about low range speed, when the wheel drops into hollows or off the back of a rock, the suspension tops out and a knock is heard. This is the shock absorber's plunger hitting the end stop as the shock reaches its full extension. This is one reason the cpmputer won't let the car stay in OR1 or OR2 above certain speeds. The other reason is of course stability, which people should keep in mind if considering a lift kit.
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  #256  
Old 03-31-2014, 10:37 PM
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Re: Wk2 Rear Knocking Noise Aussie GC Laredo

I heard today (01/04/14) not a joke, from my dealers head mechanic that Jeep Aust are close to finalising a fix for the knocking in the steel suspension self levelling shock combo, it is in final testing phase, this mechanic is aware of all the other trial and error testing like trying different part numbered shocks etc but believes the fix related to the top mount, (weak point) he said he hoped for the info to be rolled out very soon. Lets hope.
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  #257  
Old 04-01-2014, 12:08 AM
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Re: Wk2 Rear Knocking Noise Aussie GC Laredo

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Originally Posted by AussieJeep View Post
I heard today (01/04/14) not a joke, from my dealers head mechanic that Jeep Aust are close to finalising a fix for the knocking in the steel suspension self levelling shock combo, it is in final testing phase, this mechanic is aware of all the other trial and error testing like trying different part numbered shocks etc but believes the fix related to the top mount, (weak point) he said he hoped for the info to be rolled out very soon. Lets hope.
Thanks for up date great news it's nice of you to share that with us.
Good to hear they are close to a fix let's hop it's permanent this time.
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  #258  
Old 04-01-2014, 01:47 AM
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Re: Wk2 Rear Knocking Noise Aussie GC Laredo

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Originally Posted by BobT View Post
You might be confusing two issues. This thread is about knocking experienced by owners of GCs with steel suspensions that have self-leveling shocks. All Aussie steel suspensions have self-leveling shocks. I'm not sure that this is the case in the States. Quadra-lift cars can also knock but for an entirely different reason. GCs have a fully independent suspension. This limits suspension travel compared to older fourbies with live axles. When traveling at normal ride height the suspension has roughly the same travel up as down. However, when set at OR1 and particularly OR2, the car has a lot of travel up but little down. So when traveling at anything over about low range speed, when the wheel drops into hollows or off the back of a rock, the suspension tops out and a knock is heard. This is the shock absorber's plunger hitting the end stop as the shock reaches its full extension. This is one reason the cpmputer won't let the car stay in OR1 or OR2 above certain speeds. The other reason is of course stability, which people should keep in mind if considering a lift kit.


BobT,

Thanks for your input. I fully concur that this thread is about GC owners with Load leveling suspension. I was just merely saying that my Quadra lift suspension clunk and rattle too.

So far the shock experts I have spoken to tell me that the design of the shock is causing the rattle be it load leveling or the Quadra lift.

I have spoken to a few shock manufacturers, they are not interested in making aftermarket replacements for GC because of the way Jeep suspension is setup. Got a call from Suspension Supplies Australia this morning, they are not interested in doing shocks for GC, they directed me to Dobinsons.

Just trying to help out. End of the day most of us have a clunk/rattle on the GC.

Thanks.
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  #259  
Old 04-06-2014, 02:18 AM
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Hi Aussie Jeep. Do you have an update on the shock saga?
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  #260  
Old 04-06-2014, 07:43 PM
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Re: Wk2 Rear Knocking Noise Aussie GC Laredo

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Originally Posted by Sandjones View Post
Hi Aussie Jeep. Do you have an update on the shock saga?
Yes there have been two articles in the Melbourne herald Sun Cars Guide one 28th March and one 4th April. The last one refers to a fix currently under trial in a Jeep Owned by Neil Wood. Lets hope it's ready for the rest of us soon.

PS there is a bit here also 2014 Grand Cherokee information - Australia
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  #261  
Old 07-24-2014, 06:45 PM
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Question Re: Wk2 Rear Knocking Noise Aussie GC Laredo

My 2014 Wk2 with tow pkg AXK has load leveling rear shocks. These shocks have made noise over low speed bumps since new and only become worse. Not a complement to Chrysler that similar complaints have come from owners going back many model years - at least back 4 model years. Similar complaints with similar misinformation from dealers in U.S. and Austrailia too? I can't comment on issues with air ride suspension. My dealer explained these shocks tend to be noisy and tech explained it's because they're designed to be under load for towing and w/o load they make thumping noise like "tennis balls in a bucket". So the dealer says this is "normal". My reaction is why would Jeep not have changed OEM part suppliers by now. If the shocks are crap, then get a different supplier. I saw only 260 posts on this subject covering 4 model years - does Jeep understand customer feedback?? I'm ready to go back to dealer for other issues and note there is a newer TSB and wonder if this is a fix. See TSB 17-002-14 "Noisy shocks". The bulletin repair focuses on replacing the upper shock mounts so maybe the problem is not the shock itself, but the mount? I'll let you know the outcome. Hate to be negative, but I'm skeptical this will be a fix.
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