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  #1  
Old February 27th, 2019, 03:17
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xdarrows xdarrows is offline
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'99XJ - Passenger Side Clunking

In the last couple of weeks, I've noticed a pretty prominent clunking sound coming from under the front passenger floor board (in the vicinity of the LCA frame mount).

I have new JKS adjustable LCAs installed.

Any ideas on how to diagnose and eliminate?

Thanks!
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  #2  
Old February 27th, 2019, 04:33
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Re: '99XJ - Passenger Side Clunking

Obviously, you are going to have to crawl under and locate the worn out suspension bushings, or steering parts, and replace them. Without your Jeep in my driveway, that's the best guess you are going to get.
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Old February 27th, 2019, 21:02
notyourdaddys_cadi notyourdaddys_cadi is offline
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Re: '99XJ - Passenger Side Clunking

a clunking, to me, i found out was the actual shock absorber...you might might want to consider setting a go pro up, or grabbing it and seeing what slop you might have, in the left to right or front and back motion. it wont be noticeable in the up and down travel, but essentially in every other way.
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Old February 28th, 2019, 10:22
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Re: '99XJ - Passenger Side Clunking

I would consider shock bushings to be part of the suspension, but as suggest already, be sure to look closely at them as well.
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Quote:
Originally Posted by bimmerjeeper

Go ahead and slam the liftgate down on a blanket, and see how long you are laughing.
Quote:
Originally Posted by soyjer

Tim MAY be 100% correct, but why would a person automatically pick him as the expert .....
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Old March 2nd, 2019, 16:13
bwinter1946 bwinter1946 is offline
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Re: '99XJ - Passenger Side Clunking

I had a similar clunking on my XJ. When we swapped the JKS lower arms side to side the noise moved from the passenger to the drivers side.
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Old March 3rd, 2019, 12:49
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Re: '99XJ - Passenger Side Clunking

Quote:
Originally Posted by bwinter1946 View Post
I had a similar clunking on my XJ. When we swapped the JKS lower arms side to side the noise moved from the passenger to the drivers side.
Interesting!

Thanks for everyone's input ... there is a ton of new stuff underneath, so "worn" parts are hopefully not part of the equation.

I've got (in the last few months):
- New OME shocks
- New JKS adjustable LCAs and UCAs
- New JKS adjustable track bar
- New OME springs
- New JKS ACOS

So, is this clunking with the JKS LCAs a known issue?
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Old March 3rd, 2019, 15:21
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Re: '99XJ - Passenger Side Clunking

The axle side suspension bushings are new ? Have you checked torque on all the new parts ? Have you inspected the exhaust system for loose/damaged parts, and failed exhaust hangers ? The motor and transmission mounts are all newer ? The 4x4 shifter mechanism bushings are all there and are tight ?
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Quote:
Originally Posted by bimmerjeeper

Go ahead and slam the liftgate down on a blanket, and see how long you are laughing.
Quote:
Originally Posted by soyjer

Tim MAY be 100% correct, but why would a person automatically pick him as the expert .....
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  #8  
Old March 4th, 2019, 14:43
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Re: '99XJ - Passenger Side Clunking

with that many new parts, good chance something loosened up or was not tight enough to begin with. start checking the new stuff.
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  #9  
Old March 4th, 2019, 22:52
bajabronco bajabronco is offline
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Re: '99XJ - Passenger Side Clunking

I was at KOH this year and heard this crazy clunking from my drivers side, it ended up being one of the jam nuts on one of the adjustable arms had come loose and the arm was clunking as it moved in and out slightly. Check the jam nuts!
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  #10  
Old March 7th, 2019, 08:51
Brown Dog Brown Dog is offline
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Re: '99XJ - Passenger Side Clunking

Transmission mount
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  #11  
Old March 7th, 2019, 10:26
bentroia bentroia is offline
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Re: '99XJ - Passenger Side Clunking

Quote:
Originally Posted by xdarrows View Post
Interesting!

Thanks for everyone's input ... there is a ton of new stuff underneath, so "worn" parts are hopefully not part of the equation.

I've got (in the last few months):
- New OME shocks
- New JKS adjustable LCAs and UCAs
- New JKS adjustable track bar
- New OME springs
- New JKS ACOS

So, is this clunking with the JKS LCAs a known issue?
Yes, on my 97 with a very similar set up... Did a very slow brake depress release exercise with a hand on the LCA to confirm it. Replaced them with Metal Cloak and the noise was gone. The two arm sections were moving slightly at the threads. Sold the old arms on craigslist fast...
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