Constant rattling when hitting bumps from middle of jeep - JeepForum.com

 
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post #1 of 8 Old 03-22-2009, 05:31 PM Thread Starter
itr1446
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Location: Sussex Nj
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Constant rattling when hitting bumps from middle of jeep

I have been getting this annoying rattling noise when ever i hit a bump in the road with my jeep. It sounds like its coming from right underneath the passenger seat so i checked the trans cross member bolts, the johny joint on the long arm, and the metal hanger thing for the exhaust but everything seems ok. The lift was almost new so i don't think its the johny joint but is there any other way to check it? I need to get rid of this noise


2000 wj inline 6 quadra drive with 242 swap
IRO 5.5" front long arm suspension and mx6 shocks
JKS track bar and disco's
OME dual steering stabilizer
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post #2 of 8 Old 03-22-2009, 07:02 PM
amonostereo
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1993 ZJ 
 
Join Date: Aug 2007
Location: Golden, CO
Posts: 334
Maybe a broken weld on an exhaust shield somewhere? If there was enough space between it and the exhaust pipes I could see that causing a hellish rattle.

'93 5.2L V8, Laredo, 242 TC swapped from a 249, 3" Coils up front and Front coils in the Rear, JKS Adjustable Track bar, K&N Cold Air Intake with Amsoil filter, Rear cargo area shelving, and KOR's Steering Gear Brace, IRO's Over-The-Knuckle Steering, Top Light Rail, Top Tire Carrier... for now...
OR If you prefer acronyms: 93 5.2 V8, 249>242, 3" FC, ~2" RC, JKS Adj. TB w/ KOR TB Bracket, K&N CIA w/ Amsoil filter, Shelves, KOR SB, IRO OTK HD steering
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post #3 of 8 Old 03-22-2009, 07:15 PM
Mickey_D
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My dad had this same problem in his Suzuki Samurai. Turned out there was a small stone in his catalytic converter heat shield.

1997 ZJ 5.2 Orvis, Baby!
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post #4 of 8 Old 03-22-2009, 07:41 PM
ChvyKc
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2006 XK Commander 
 
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Location: Columbia, SC
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I know that you said it was coming from the middle of the Jeep but did you check the brake pads? I had a problem like this with my DSM and it ended up being one of the metal retaining clips on the back brake pad was borken and the pad was rattling around against the rotor.

-ChvyKc
'06 XK 3.7L (Stock for now)
'07 WK HEMI Limited (Wife's)
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post #5 of 8 Old 03-22-2009, 08:05 PM
benspilk09
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1997 ZJ 
 
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make sure EVERYTHING is tight, if a shock or control arm is the slightest bit loose, it will make whole lot of noise. They probably should be torqued to around 100-150 foot lbs.
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post #6 of 8 Old 03-22-2009, 08:50 PM
mosespaul
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1997 ZJ 
 
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Location: Reynoldsburg
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grab the exhaust just befor or after the cat (AFTER IT COOLS DOWN!!!!) and shake it, maybe its the cat's honey comb.
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post #7 of 8 Old 03-22-2009, 10:25 PM Thread Starter
itr1446
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Location: Sussex Nj
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I don't think its the brakes its perfectly quiet when on a smooth road, I double checked and tightened shocks and control arms. I haven't tried to shake it when its cold but when i shake the exhaust hard the whole trans and transfer case and everything swings back and forth from drivers to passenger side, the mount looks good but should i get a new one?

2000 wj inline 6 quadra drive with 242 swap
IRO 5.5" front long arm suspension and mx6 shocks
JKS track bar and disco's
OME dual steering stabilizer
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post #8 of 8 Old 03-22-2009, 10:56 PM
amonostereo
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1993 ZJ 
 
Join Date: Aug 2007
Location: Golden, CO
Posts: 334
Did you just say that your transmission and transfer case move when you shake the exhaust? Maybe I am wrong here, but I am pretty sure that is VERY bad. Maybe you meant the catalytic converter and muffler swing back and forth?

'93 5.2L V8, Laredo, 242 TC swapped from a 249, 3" Coils up front and Front coils in the Rear, JKS Adjustable Track bar, K&N Cold Air Intake with Amsoil filter, Rear cargo area shelving, and KOR's Steering Gear Brace, IRO's Over-The-Knuckle Steering, Top Light Rail, Top Tire Carrier... for now...
OR If you prefer acronyms: 93 5.2 V8, 249>242, 3" FC, ~2" RC, JKS Adj. TB w/ KOR TB Bracket, K&N CIA w/ Amsoil filter, Shelves, KOR SB, IRO OTK HD steering
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