Rattle underneath

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Mar 22, 2010 | 02:07 PM

#16

jon_89

Seasoned Member

Joined: Jul 2009

Posts: 398

Likes: 0

From: Bremerton

Year: 87

Model: Cherokee

Engine: 4.0

Got the same problem only when I am stopped. Every time I get out it goes away. Now I have some ideas of what to look for.

Mar 22, 2010 | 02:51 PM

#17

spahr69

Senior Member

Joined: Jun 2009

Posts: 562

Likes: 0

From: pennsylvania

Year: 1995

Model: Cherokee

Engine: 4.0 liter

im thinking its the exhaust hanger.

Mar 22, 2010 | 09:29 PM

#18

96liftedXJ

Thread Starter

Member

Joined: Jan 2010

Posts: 118

Likes: 0

From: Xenia, Ohio

Year: 1996

Model: Cherokee

Engine: 4.0

Yea. That does make sense. But when im out of it, it looks like it wouldnt touch it. But i have never heard it while just in park its only when im in gear, then when i put it in park it goes away. But i never thought about looking at the exhaust hanger thats right there. And man am i glad that im not the only one hearing this noise. Must be a jeep defect. haha....Well i will check that next.

Mar 22, 2010 | 10:17 PM

#19

AJAX

Newbie

Joined: Mar 2010

Posts: 18

Likes: 0

From: Minnesota

Year: 98

Model: Cherokee

Engine: 4.0

Quote:

Originally Posted by 96liftedXJ

I have something rattling under my jeep and its not the exhaust. I cant figure out what it is. When i crawl under it while its running i still cant see whats rattling. I grab stuff and shake it and nothing rattles. Its got me. I hear it when im sitting at a stop and slightly while im taking off. Does anyone know what it might be or experienced this problem? Any info would help out. Thanks.

I had the same thing happening with mine a few years ago. I kind of rattled and sped up with throttle, but only then. A friend of mine who is a mechanic said it was the flex plate bolts. I thought he was nuts, it had about 100k on it and I thought that if that was going to happen it would have done it long before this. But, sure enough, they were loose. The end

Feb 16, 2016 | 10:48 PM

#20

All Proven No Promises

Newbie

Joined: Feb 2016

Posts: 1

Likes: 0

Model: Cherokee

Youre totally right.... I have an all 4wd... I put the 4w in neutral (basicly what u did...and the noise stopped)...so obviously theres a problem with the 4w but the noise stopped

Quote:

Originally Posted by halmotors

There's an exhaust hangar right near the crossmember that the tranny sits on, and it's pretty common for it to rot away and let the pipe sit on the crossmember. At higher RPM the amount of vibration isn't enough to cause a loud knocking, but when you're sitting still or just taking off, there's enough vibration to cause that knocking sound.

Alternatively, when you hear it and you're sitting inside the vehicle, try grabbing your 4WD selector handle and wiggling it around a bit to see if it stops the noise, too.