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post #1 of 11 Old 08-10-2020, 05:51 PM Thread Starter
2013GCWK2
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Question Mystery Rattle

Hello, I have a 2013 Grand Cherokee Laredo X. 114,000 miles. I've noticed a mystery rattle/vibration coming from the rear somewhere. I attached a video with sound. It's somewhat hard to hear, but I have no other way to describe it.

I tried taking everything out of the spare tire area, that didn't work.

I jacked it up and removed the tires, couldn't find anything that was loose.

I've shaken the tailgate as best I could, no luck with that.

It seams like it is coming from the rear passenger side, around where the shock would mount, but the shocks look like they are in good shape (albeit 7 years old).

The noise sounds like something is very loose, and vibrating/knocking around loosely. Its not a large clunk, rather something moving back and forth. It just doesn't seam like a shock mount, but i could be wrong.

The other thing is that i noticed one time that the sub-woofer was loose and rattling, but I tightened it, and the noise is still present. Maybe something inside the sub-woofer housing?

Anyone else have this?

It's one of those things I can only hear when driving over bumps.

Thanks,

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post #2 of 11 Old 08-10-2020, 07:32 PM
ColdCase
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The shock mounts, even when looking good, can rattle. Some have reported worn/rusted suspension bushings and the bushings between suspension gage and body. Skid plates can rattle. There has been quite a bit of discussion over the years. If no one jumps in here by the time I get back, I'll see if I can find a good one.

It doesn't seem to be a one size fits all...

I just got lost in thought. It was unfamiliar territory;
Current: 2011 Grand Cherokee Overland V8, 2009 Liberty Rocky Mt V6
Previous: 2000 Grand Cherokee Laredo I6, 1979 CJ7 I6 Quadratrac
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post #3 of 11 Old 08-10-2020, 10:33 PM
emacca
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Ok try this, have a look at the top of the rear springs, the upper two coils should be wrapped in plastic tubing, if that is missing, or perished flacking off that will cause a clunking, rattle over road irregularities

In my case I cut a strip of carpet, jacked the body up and jammed it between the two top coils

Stoped the noise immediately

I had previously tried

New rear shock mounts
New rear shocks
New rear sway bar end links
Removed shocks and lubricate upper moi ts

Remove rear shocks and put packing in rear shock mount
Stripped out the luggage area and spare TYRE

Removes luggage area side panels
Removed rear lift gate internal lining

Cleaned tightened placed noise deadening materials in luggage area

I even tried running lower TYRE pressure ( 20 inch wheels)

But the original 18 inch wheels on, bought new rear disc pads

I sprayed silicone lubricant every where including the exhaust mounts

Still couldnít fix it

I was at the point of giving up

And thought one more try, so got under the vehicle and saw the wear marks where the spring upper coils were contacting, did the carpet thing and immediately no noise

All quite now for months

I will probably replace springs with lowered ones, but at the moment happy to have no noise
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post #4 of 11 Old 08-11-2020, 12:19 PM Thread Starter
2013GCWK2
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Thanks guys, I'll take a closer look.

Heres a link to a video of the sound. Not sure it will work as a hyperlink, you may have to copy and paste it.

youtube.com/watch?v=WraQXz9DI7E
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post #5 of 11 Old 08-11-2020, 01:20 PM
ColdCase
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New members have a probationary period where links are not permitted, you can thank the spammers for that.

I just got lost in thought. It was unfamiliar territory;
Current: 2011 Grand Cherokee Overland V8, 2009 Liberty Rocky Mt V6
Previous: 2000 Grand Cherokee Laredo I6, 1979 CJ7 I6 Quadratrac
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post #6 of 11 Old 08-11-2020, 08:33 PM Thread Starter
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Yea that's too bad. I'll try taking a look at the coil springs, may try the carpet. The noise has been driving me crazy.
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post #7 of 11 Old 08-13-2020, 08:14 PM
Jasonoff
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Anyone know if there's anything that can make a thin metal (like a heat shield) rattle noise hidden under the fuel tank or transfer case skid plates on the Trailhawk?

I have a rattle on both sides when going over washboard type bumps. Nothing exposed that I can touch rattles. All the skid plates are solid when I bang on them. Exhaust all good. Could possibly be a brake rotor heat shield, but it seems to be more central.

2017 Grand Cherokee Trailhawk (Tow Pig)
2010 C63 AMG Race Car (Track Pig)
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post #8 of 11 Old 08-13-2020, 08:53 PM
9496ZJs
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A stone chip that has bounced up on top of the skid plate.
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post #9 of 11 Old 08-13-2020, 09:25 PM
tampamark
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My JGC will make a most obnoxious rattle banging sound from the rear that at first made me question my rear shock. Only to determine when someone reclines the rear seat and then leaves the vehicle the rear seatbelt bouncing around against the pillar. When I put the set back up to vertical the seatbelt is suppressed.

2000 TJ Sahara (sold)
2015 Grand Cherokee Summit - 6 cylinder Gas
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post #10 of 11 Old 08-14-2020, 06:26 AM
Jasonoff
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Quote:
Originally Posted by 9496ZJs View Post
A stone chip that has bounced up on top of the skid plate.
I have banged on all the skid plates with a rubber mallet. I did dislodge a couple stones but it wasn't the source of the noise. It's more like a heat shield clanging against the frame type sound.

2017 Grand Cherokee Trailhawk (Tow Pig)
2010 C63 AMG Race Car (Track Pig)
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post #11 of 11 Old 08-14-2020, 08:24 PM
b16z6+s20
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mine had a rattle sound when braking or accelerating coming from the passenger side, it was heat shield that got lose after tire change, moved it with my hand away of any metal and never again. only sound now is a squeaky sound coming from the rear, tried driving with hatch/latch open took out everything in the trunk, adjusted side panels and nothing, starting to live with it
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