Something's "clunking" under the jeep! - JeepForum.com

Reply
 
LinkBack Thread Tools
post #1 of 31 Old 08-23-2012, 08:13 AM Thread Starter
cgseanp
Registered User
 
Join Date: Aug 2011
Location: petaluma
Posts: 103
Something's "clunking" under the jeep! Update post 15

Morning!

For as long as I've had my jeep (only been 3 or so months now), I've had this clunking or banging noise under the jeep, usually happens when I back up and then stop, but I guess it also happens when I'm just driving and then slow down or stop. At first I thought it was normal, maybe do to having a lift or something (don't know a whole lot about Jeeps).. Anyways, to better describe what it does here's an example..

Backing out of driveway and when I use the brakes, something underneath moves and bangs up against the floorboard. I can't tell if its drivers or passengers side, but it's fairly loud. It's like something down there is suspended, but not bolted down, so as I take off or stop, it is swinging around. I'm sure somebody knows what this is! Help me out! thanks

cgseanp is offline  
Sponsored Links
Advertisement
 
post #2 of 31 Old 08-23-2012, 08:17 AM
Jeepsr4me
Registered User
 
Join Date: Dec 2004
Posts: 8,831
Get under there and grab the rear of the transfer case and lift up and down see if it moves a good bit, but my bet is the trans mount.
Jeepsr4me is offline  
post #3 of 31 Old 08-23-2012, 08:18 AM
Dragonwitch
Registered User
1995 YJ Wrangler 
 
Join Date: Jul 2012
Location: Windsor
Posts: 68
we had a clunking noise that turned out to be the rear sway bar wasn't attached to anything...bracket on the axel had broke

try everything at least once before you form an opinion
Dragonwitch is offline  
post #4 of 31 Old 08-23-2012, 08:24 AM Thread Starter
cgseanp
Registered User
 
Join Date: Aug 2011
Location: petaluma
Posts: 103
Thanks for quick replies.. so, if it is the Trans mount, is this an easy fix? Is it just that a bolt broke and needs to be reattached, or is something actually broke? Thanks!
cgseanp is offline  
post #5 of 31 Old 08-23-2012, 08:41 AM
Jeepsr4me
Registered User
 
Join Date: Dec 2004
Posts: 8,831
Just get under there. You will know more and we will be able to help you a little better.
Jeepsr4me is offline  
post #6 of 31 Old 08-23-2012, 08:49 AM Thread Starter
cgseanp
Registered User
 
Join Date: Aug 2011
Location: petaluma
Posts: 103
roger, well ill report back when i can get down there!
cgseanp is offline  
post #7 of 31 Old 08-23-2012, 10:18 AM
sdotcarter
Registered User
1995 YJ Wrangler 
 
Join Date: Nov 2011
Location: Fort Kent
Posts: 803
Could be the exhaust too
sdotcarter is offline  
post #8 of 31 Old 08-23-2012, 11:21 AM Thread Starter
cgseanp
Registered User
 
Join Date: Aug 2011
Location: petaluma
Posts: 103
Havn't been able to check yet, but I do think there may be something lose with the exhaust as it rattles sometimes so Ill check that out also
cgseanp is offline  
post #9 of 31 Old 08-23-2012, 11:21 AM
seattle_yj
Registered User
1993 YJ Wrangler 
 
Join Date: Jun 2012
Location: Issaquah
Posts: 946
Same problem was happening to me for a long time, just got around to fixing it this week.

Like Jeeps4m and sdotCarter were saying, my issue was a mixture of worn trans mount and tcase insulator arm (aka isolator arm, pin, etc) and the cat was clinking against the skid plate.

The transmount is an easy fix. I bought a part from napa for $23 but you can buy it cheaper here: http://www.quadratec.com/products/56003_0024.htm

The insulator arm is a main culprit here because it is not always put back correctly when the skid plate is removed. I also replaced this "pin" and the bushings. The parts I used are here: http://www.mountainoffroad.com/_e/Je...2_95_Jeeps.htm

The cat issue smacking against the skid plate was fixed by installing a new exhaust found here: http://www.jeep4x4center.com/exhaust...tor-35460.html
seattle_yj is offline  
post #10 of 31 Old 08-23-2012, 12:01 PM
Luuca
Typical /f12 Hooligan
 
Luuca's Avatar
2005 LJ Wrangler 
 
Join Date: Apr 2012
Location: Corona
Posts: 5,069
Mine would do the same as the OP. It was the Transmission mounts. Funny enough, I just recently heard an exhaust rattle as well, looked around under there, and found one of my hangars had come out. The rubber bushing inside the rear hangar mount was bad. My local muffler shop had a bushing that worked and $10 later, they had it installed and hung properly.

Welcome to the wonderful world of YJs.. you'll soon learn how to listen, feel, and smell your way into vehicle diagnostics.

91 YJ "Alice" 4.0L, AX-15, NP 231 w/HnT Flange, Adams Driveshafts F/R, 2.5" OME 36Rs, 5/8" /f12 Booms, 32" Yoko ATs, 4.10 D30/35 Aussie Lockers F/R
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
YJOTM never
05 LJ Rubicon "Ghost"

Luck Favours The Prepared
Luuca is offline  
post #11 of 31 Old 08-23-2012, 01:09 PM
Rproject
Registered User
1987 YJ Wrangler 
 
Join Date: Aug 2008
Location: Sandwich, IL
Posts: 2,759
Quote:
Originally Posted by Luuca View Post
Welcome to the wonderful world of YJs.. you'll soon learn how to listen, feel, and smell your way into vehicle diagnostics.
Amen to that.

When someone's riding with me and asks, "what's that noise/smell/etc" I can almost always come right back with an answer. Over time we become very intimate with our rigs. LOL

1996 White ZJ
1987 Maroon YJ (sideways build)
1996 Forest Green XJ

The "sideways" build thread:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Rproject is offline  
post #12 of 31 Old 08-24-2012, 08:09 AM Thread Starter
cgseanp
Registered User
 
Join Date: Aug 2011
Location: petaluma
Posts: 103
well I got under my jeep and apparently I don't even have the transmission mount. I could be wrong, but I was checking out the skid plate and there is only one bolt going through the plate (not counting the 6 holding it up) and i thinik it is the " torque arm stud" from looking at the FAQ section. So, no other bolts coming through would equal no transmount? or a broken one? I'm going to try to get to it this weekend if I can find a part local, otherwise Ill order it and do it when I can.
cgseanp is offline  
post #13 of 31 Old 08-24-2012, 08:16 AM
sdotcarter
Registered User
1995 YJ Wrangler 
 
Join Date: Nov 2011
Location: Fort Kent
Posts: 803
Yea I'd be easy on driving it too. Any parts store will have it.
sdotcarter is offline  
post #14 of 31 Old 08-24-2012, 11:48 AM
seattle_yj
Registered User
1993 YJ Wrangler 
 
Join Date: Jun 2012
Location: Issaquah
Posts: 946
Here is a pic of my skid plate. If your missing the two 'trans mount' bolts, that would be bad. When you look at the part, they are actually studs that protrude from the rubber. They could have been over torqued and maybe pulled out of the bottom. Oh well, easy enough fix.
Attached Thumbnails
skid_plate.jpg  
seattle_yj is offline  
post #15 of 31 Old 08-27-2012, 02:25 PM Thread Starter
cgseanp
Registered User
 
Join Date: Aug 2011
Location: petaluma
Posts: 103
I went out and bought a new trans mount and installed it this weekend.. Unfortunately, I DID have a trans mount, but for some reason mine looks a little different then in the pictures. The two trans mount bolts don't stick out as far as in this picture, they are almost flush with the skid plate. The area of the skid plate that the bolts go through is like recessed a little, so that's why the bolts don't stick out past the skid plate. Anyways, like I said, I did have a mount already, but I still went and changed it since it looked old and was only a 20$ part. Problem not fixed though. It's hard to tell, but this morning I thought the banging noise came from passenger side in the back.. Maybe it is my exhaust moving around, but I pushed on it and couldn't really tell if it would move or not when I was driving.
cgseanp is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.



Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Jeep Forums Replies Last Post
1997 TJ -- Rear Wheel "Clunking Noise"...??? tank29 TJ Wrangler Technical Forum 15 06-10-2011 07:12 PM
Slop in front driveshaft....causing "clunking" under load arcticchilla TJ Wrangler Technical Forum 3 04-02-2010 02:50 PM
Is This "clunking" Sound Normal??? MrKing TJ Wrangler Technical Forum 5 05-25-2009 09:15 PM
Rear spring is "clunking" NYwranglanator TJ Wrangler Technical Forum 19 06-16-2006 11:18 PM
HELP...rear end sounds "loose" -clunking noise ninjajeep TJ Wrangler Technical Forum 6 10-18-2004 12:12 AM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome