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Unread 02-12-2012, 12:21 PM   #1
Mp5ben
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2001 WJ 
 
Join Date: Feb 2011
Location: San Antonio, Texas
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Knockin sound after wheeling? Uh oh

I was wheeling at a new spot with my manager haha and it was muddy with a lot of little potholes every where, the kind where the jeep would flex a lot...if the sway bar was disconnected.. On the road it sounds like something is knocking on the bottom of the body lightly. I recently installed a 2" BB and checked everything I loosened, including the sway bar links and shaked everything under the body to see if I could recreate the sound but couldn't. Any other ideas what it could be? Would bad u joints make the sound? It seeeems like the sound appears on small bumps. Help a WJ owner out?

Thanks,
Ben

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Unread 02-12-2012, 12:26 PM   #2
smuggler
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1998 ZJ 
 
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Ah yes that is a common Jeep thing, weird noises after wheelin'. This is how you fix it. You have to go wheelin' again, but in reverse. Once you get done the clunk should be gone.
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Unread 02-12-2012, 12:36 PM   #3
cbailey_21
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Quote:
Originally Posted by smuggler View Post
Ah yes that is a common Jeep thing, weird noises after wheelin'. This is how you fix it. You have to go wheelin' again, but in reverse. Once you get done the clunk should be gone.
This response brought joy to my day...
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[QUOTE=smuggler;13038059]Ah yes that is a common Jeep thing, weird noises after wheelin'. This is how you fix it. You have to go wheelin' again, but in reverse. Once you get done the clunk should be gone.[/QUOTE]

MODS: BDS 2" coils, Bilstein 5100 struts, 17"Moab takeoffs, 245/65/17 Hankook Dynapro ATMs, Addco 1" Rear Swaybar, Energy Suspension greasable swaybar bushings, westin tail light guards, Rancho HD Steering stabilizer, Freedom Edition running boards, Spyder Halo Foglights, Rola Vortex roof rack.
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Unread 02-12-2012, 12:38 PM   #4
gcjeeping
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2001 WJ 
 
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Is the exhaust loose anywhere. Grab a hold of it at different places an try and move it. Mine would at the back where it goes over the rear axle.
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Unread 02-12-2012, 12:38 PM   #5
cbailey_21
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And im not too knowledgeable about suspensions and clunking noises, maybe check all your control arm bushings and shock bushings?? You may have wallowed them out, Im just guessing into the wind..
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[QUOTE=smuggler;13038059]Ah yes that is a common Jeep thing, weird noises after wheelin'. This is how you fix it. You have to go wheelin' again, but in reverse. Once you get done the clunk should be gone.[/QUOTE]

MODS: BDS 2" coils, Bilstein 5100 struts, 17"Moab takeoffs, 245/65/17 Hankook Dynapro ATMs, Addco 1" Rear Swaybar, Energy Suspension greasable swaybar bushings, westin tail light guards, Rancho HD Steering stabilizer, Freedom Edition running boards, Spyder Halo Foglights, Rola Vortex roof rack.
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Unread 02-12-2012, 12:46 PM   #6
Mp5ben
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I grabbed the exhaust from the back and gave it a good shaking and it didn't make any sound. But I don't think that would make the sound, the sound is like a rock hitting the under body but not loud
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Unread 02-12-2012, 01:05 PM   #7
cbailey_21
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Location: carthage, illinois
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Quote:
Originally Posted by Mp5ben View Post
I grabbed the exhaust from the back and gave it a good shaking and it didn't make any sound. But I don't think that would make the sound, the sound is like a rock hitting the under body but not loud
My jeep has this same clunking sound under the shifter/ driver seat whenever it is under 25 degrees... even if the jeep is in park
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[QUOTE=smuggler;13038059]Ah yes that is a common Jeep thing, weird noises after wheelin'. This is how you fix it. You have to go wheelin' again, but in reverse. Once you get done the clunk should be gone.[/QUOTE]

MODS: BDS 2" coils, Bilstein 5100 struts, 17"Moab takeoffs, 245/65/17 Hankook Dynapro ATMs, Addco 1" Rear Swaybar, Energy Suspension greasable swaybar bushings, westin tail light guards, Rancho HD Steering stabilizer, Freedom Edition running boards, Spyder Halo Foglights, Rola Vortex roof rack.
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Unread 02-12-2012, 04:23 PM   #8
Mp5ben
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Hm, just wondering, could this be the A arm messing up? I didn't add an a arm space after my lift
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Unread 02-12-2012, 04:41 PM   #9
robby65
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Check the rear a arm bushings? Maybe the rear ball joint?
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Unread 02-12-2012, 09:53 PM   #10
rboots
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I just did a bb and had a knocking noise similar to that, ended up being the shock mount on the rear axle that was just not tight enough. bolt was tight but just needed a little more and it went away. Thats my experience
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Unread 02-13-2012, 08:33 AM   #11
Mp5ben
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Damn. I forgot to check the shocks haha. I'll check those as soon as I get back to my Jeep
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Unread 02-13-2012, 04:11 PM   #12
Mp5ben
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Just checked the shocks and tightened them to torque specs. No change. It literally sounds like there's something dangling under the jeep and knocking around. I'm at a loss, my dads going to take it to a shop soon if I can't find the problem
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Unread 02-13-2012, 04:57 PM   #13
Mp5ben
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Found the problem. It was the front sway bar linkage. Don't know how the sound managed to sound like it was coming from the back, but I'm just glad my Jeep isn't broken
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