Knocking/clunking under floorboard - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > TJ Jeep Wrangler Forum > TJ General Discussion Forum

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 05-31-2012, 11:14 AM   #1
Jeeper
 
wavebacktothetj's Avatar
 
Join Date: Oct 2008
Location: Dothan, AL
Posts: 976
Knocking/clunking under floorboard

I have a knocking and clunking under my floorboard only at acceleration from a dead stop then goes away as I gain speed I do have some play in the front and rear driveshafts but I'm not sure how much you are supposed to have but any help would be appreciated I can't figure it out I have all new suspension sway and track bars and it's all tight

__________________
Dpg offroad ultimate kit- OME/JKS on 33's the rest is in my profile
wavebacktothetj is offline   Quote Quick Reply
Old 05-31-2012, 11:16 AM   #2
Jeeper
 
Kevbz's Avatar
 
Join Date: Apr 2011
Location: O'Fallon, MO
Posts: 1,636
zero play....i bet its tell tail when you are slowing down and you can can here, it clunk clunk clunk at a slower rate as you come to a stop. If you can grab the driveshaft and push /pull on it and there is any play in the u joint, you found your clunk!

__________________
Per Mare, Per Terram...Semper Fidelis
Kevbz is offline   Quote Quick Reply
Old 05-31-2012, 11:27 AM   #3
Newb
 
Join Date: May 2012
Posts: 3
I agree it sounds like a u joint in the drive shaft. Although I had a clunk in my tj and it ended up being a broken mount for one of my rear shocks.
benniegatlin is offline   Quote Quick Reply
Old 05-31-2012, 11:27 AM   #4
Jeeper
 
wavebacktothetj's Avatar
 
Join Date: Oct 2008
Location: Dothan, AL
Posts: 976
Ahhh ok yeah I do have play in both shafts I guess it's u joint time thanks
__________________
Dpg offroad ultimate kit- OME/JKS on 33's the rest is in my profile
wavebacktothetj is offline   Quote Quick Reply
Old 05-31-2012, 01:26 PM   #5
Jeeper

WF Supporting Member
 
yoopone's Avatar
 
Join Date: Dec 2010
Location: Suburban Chicago and the UP of Michigan
Posts: 551
Sounds like you are on the problem, hope that solves it. Mine made a clunking noise on the floorboard on acceleration and it turned out to be the inside of the cat convertor had broken loose. New cat fixed it up,
__________________
1989 YJ
1997 TJ
1999 TJ
2006 TJ
2005 TJ Rubicon
yoopone is offline   Quote Quick Reply
Old 05-31-2012, 02:54 PM   #6
Jeeper
 
arcountryboy's Avatar
 
Join Date: Apr 2011
Location: England, AR
Posts: 849
Another common problem that does that is the bushings in the t-case linkage. Next time it starts clunking, grab the lever and either slightly pull it up or push it to the side. I'd almost bet the clunking stops.
__________________
Arkansas Crawlers
BlueRibbon Coalition


arcountryboy is offline   Quote Quick Reply
Old 05-31-2012, 03:05 PM   #7
Jeeper
 
IndyJeepMan's Avatar
 
Join Date: Dec 2009
Location: Indianapolis
Posts: 3,387
I can see how that crap makes clanking noises..
Attached Thumbnails
Click image for larger version

Name:	ForumRunner_20120531_160441.jpg
Views:	109
Size:	152.8 KB
ID:	127839  
__________________
1980 CJ7
3.9L Cummins POWER!
Follow my build, its cool and stuff: http://www.wranglerforum.com/f118/project-shake-n-bake-a-cummins-cj-188515.html]
IndyJeepMan is offline   Quote Quick Reply
Old 05-31-2012, 03:21 PM   #8
Jeeper
 
wavebacktothetj's Avatar
 
Join Date: Oct 2008
Location: Dothan, AL
Posts: 976
Ok cool thanks just to be sure you are talking about the 4wd lever right?
__________________
Dpg offroad ultimate kit- OME/JKS on 33's the rest is in my profile
wavebacktothetj is offline   Quote Quick Reply
Old 05-31-2012, 04:06 PM   #9
I like beer and stuff

WF Supporting Member
 
Hammerwalk's Avatar
 
Join Date: Oct 2010
Location: Haslet, TX
Posts: 1,125
Did you get this after your lift? Mine does the exact same thing. I even got under to check everything thinking it was maybe something hitting the underside but it drives me bat shit crazy.

I had none of this until after my lift. Worse at going from a stop and when I am on a dirt road with small rocks. Sounds like something keeps kicking up and hitting right below my feet, like something is terribly loose. I even double checked my engine mounts and MML.
__________________
"And then one day you find
Ten years have got behind you
No one told you when to run
You missed the starting gun"
Hammerwalk is offline   Quote Quick Reply
Old 05-31-2012, 05:17 PM   #10
Jeeper
 
IndyJeepMan's Avatar
 
Join Date: Dec 2009
Location: Indianapolis
Posts: 3,387
Quote:
Originally Posted by wavebacktothetj
Ok cool thanks just to be sure you are talking about the 4wd lever right?
Yeah that is the stock erector set style linkage.
__________________
1980 CJ7
3.9L Cummins POWER!
Follow my build, its cool and stuff: http://www.wranglerforum.com/f118/project-shake-n-bake-a-cummins-cj-188515.html]
IndyJeepMan is offline   Quote Quick Reply
Old 05-31-2012, 05:35 PM   #11
Rock-Rubber

WF Supporting Member
 
GoldenSahara00's Avatar
 
Join Date: Aug 2010
Location: SCPA
Posts: 16,446
My first thought was the linkage for the tcase as well. I fought this issue myself. The boot and gasket that goes between the middle pivot rod aka the "torque shaft" and the tub on the body was gone. So the rod was free to slide in the mount and would make contact with the tub. I have this pic I shared before when helping someone. Check the area with the green x. A drop bracket may help depending on what your setup is. I didn't need one. The bushing kit might do it. I added some other pics that may help.
Attached Thumbnails
Click image for larger version

Name:	image-2974694760.jpg
Views:	164
Size:	57.9 KB
ID:	127881  
Attached Images
   
__________________
Ryan - A good eye, a light foot, and a smart rig.
Bolt-ons are boring
AMERICAN JEEPER
My Build - http://www.wranglerforum.com/f118/pr...a00-74622.html
Rausch Creek Trip: 2014 Trip Coming Soon
GoldenSahara00 is offline   Quote Quick Reply
Old 05-31-2012, 09:32 PM   #12
Jeeper
 
IndyJeepMan's Avatar
 
Join Date: Dec 2009
Location: Indianapolis
Posts: 3,387
Quote:
Originally Posted by GoldenSahara00
My first thought was the linkage for the tcase as well. I fought this issue myself. The boot and gasket that goes between the middle pivot rod aka the "torque shaft" and the tub on the body was gone. So the rod was free to slide in the mount and would make contact with the tub. I have this pic I shared before when helping someone. Check the area with the green x. A drop bracket may help depending on what your setup is. I didn't need one. The bushing kit might do it. I added some other pics that may help.
Or...

And be done with it!
Attached Thumbnails
Click image for larger version

Name:	ForumRunner_20120531_223229.jpg
Views:	101
Size:	140.7 KB
ID:	127959  
__________________
1980 CJ7
3.9L Cummins POWER!
Follow my build, its cool and stuff: http://www.wranglerforum.com/f118/project-shake-n-bake-a-cummins-cj-188515.html]
IndyJeepMan is offline   Quote Quick Reply
Old 05-31-2012, 09:53 PM   #13
Jeeper
 
wavebacktothetj's Avatar
 
Join Date: Oct 2008
Location: Dothan, AL
Posts: 976
Quote:
Originally Posted by Hammerwalk View Post
Did you get this after your lift? Mine does the exact same thing. I even got under to check everything thinking it was maybe something hitting the underside but it drives me bat shit crazy.

I had none of this until after my lift. Worse at going from a stop and when I am on a dirt road with small rocks. Sounds like something keeps kicking up and hitting right below my feet, like something is terribly loose. I even double checked my engine mounts and MML.
I had it slightly when I had my 4" on there but it's worse after doing the Dpg ultimate and I have the same exact problem your talking about, did you find a fix?


I'm checking my links tomorrow thanks for the pics!
__________________
Dpg offroad ultimate kit- OME/JKS on 33's the rest is in my profile
wavebacktothetj is offline   Quote Quick Reply
Old 05-31-2012, 10:02 PM   #14
I like beer and stuff

WF Supporting Member
 
Hammerwalk's Avatar
 
Join Date: Oct 2010
Location: Haslet, TX
Posts: 1,125
No I have not found a fix. Couldn't think of how to ask the question of what the hell it could be. I'm going to check those links tomorrow or this weekend. I had a hint it was that area but couldn't tell but I was able to replicate the sound almost on demand.

Did you install the adjustment bracket that came with the body lift for the transfer case link?

Anyway glad to see someone else with the same lift and setup with the same issue.
__________________
"And then one day you find
Ten years have got behind you
No one told you when to run
You missed the starting gun"
Hammerwalk is offline   Quote Quick Reply
Old 05-31-2012, 10:43 PM   #15
Rock-Rubber

WF Supporting Member
 
GoldenSahara00's Avatar
 
Join Date: Aug 2010
Location: SCPA
Posts: 16,446
Quote:
Originally Posted by IndyJeepMan

Or...

And be done with it!
That's the expensive way

I would do the cable shifter every time were I a rich man.

You can make your own shift boot pretty easily as well.


Anyways for you guys. It seems to happen when you added a tcase drop and then remove it. Because that's when I got mine. After installing the bl and Mml and removing the tcase drop. Check out the areas I pointed out and let me know what you find.
__________________
Ryan - A good eye, a light foot, and a smart rig.
Bolt-ons are boring
AMERICAN JEEPER
My Build - http://www.wranglerforum.com/f118/pr...a00-74622.html
Rausch Creek Trip: 2014 Trip Coming Soon
GoldenSahara00 is offline   Quote Quick Reply
Old 06-01-2012, 08:42 PM   #16
Jeeper
 
wavebacktothetj's Avatar
 
Join Date: Oct 2008
Location: Dothan, AL
Posts: 976
Yeah I will because I had a 2" tcase drop removed that completely up to the frame then did all the bl and mml and lowered my previos suspension and now I've got this knock I'm going to get under on my weekend (mon and tues) and I'll post up what I find
__________________
Dpg offroad ultimate kit- OME/JKS on 33's the rest is in my profile
wavebacktothetj is offline   Quote Quick Reply
Old 06-02-2012, 12:00 PM   #17
Rock-Rubber

WF Supporting Member
 
GoldenSahara00's Avatar
 
Join Date: Aug 2010
Location: SCPA
Posts: 16,446
Sounds good you can give me a pm when you do in case I miss the post in this thread.
__________________
Ryan - A good eye, a light foot, and a smart rig.
Bolt-ons are boring
AMERICAN JEEPER
My Build - http://www.wranglerforum.com/f118/pr...a00-74622.html
Rausch Creek Trip: 2014 Trip Coming Soon
GoldenSahara00 is offline   Quote Quick Reply
Old 06-02-2012, 12:09 PM   #18
Jeeper
 
Join Date: Feb 2011
Location: Texas
Posts: 3,161
Quote:
Originally Posted by arcountryboy
Another common problem that does that is the bushings in the t-case linkage. Next time it starts clunking, grab the lever and either slightly pull it up or push it to the side. I'd almost bet the clunking stops.
I'd put money on this being the problem. Especially if you did a BL
You'd be damn surprised how much noise that stuff can make.
KidRock171 is offline   Quote Quick Reply
Old 06-02-2012, 12:13 PM   #19
Jeeper
 
Join Date: Feb 2011
Location: Texas
Posts: 3,161
Quote:
Originally Posted by wavebacktothetj
Yeah I will because I had a 2" tcase drop removed that completely up to the frame then did all the bl and mml and lowered my previos suspension and now I've got this knock I'm going to get under on my weekend (mon and tues) and I'll post up what I find
A definitive way to see if this is the problem is to drive it. Find the knock, then tension the 4wd lever. It will go away. Then you KNOW your problem is the linkage. I definitely recommend the Novak cable shifter if you got the spare change.
KidRock171 is offline   Quote Quick Reply
Old 06-03-2012, 09:17 AM   #20
I like beer and stuff

WF Supporting Member
 
Hammerwalk's Avatar
 
Join Date: Oct 2010
Location: Haslet, TX
Posts: 1,125
I haven't had a chance to get under and look but I did hold down the 4wd shifter down when I felt the knocking and it seems to be the cause of the noise. Will be Getting the Novak cable shifter but will be low on my priority list now that I know it's nothing major.
__________________
"And then one day you find
Ten years have got behind you
No one told you when to run
You missed the starting gun"
Hammerwalk is offline   Quote Quick Reply
Old 06-03-2012, 11:20 AM   #21
Jeeper
 
Join Date: Feb 2011
Location: Texas
Posts: 3,161
Mines been knocking for six months or so. It's annoying but I'm not gonna fix mine till someone gets it for Christmas or birthday.
KidRock171 is offline   Quote Quick Reply
Old 06-03-2012, 12:58 PM   #22
Rock-Rubber

WF Supporting Member
 
GoldenSahara00's Avatar
 
Join Date: Aug 2010
Location: SCPA
Posts: 16,446
Fixed mine for 15 bucks.

Novak will be a nice upgrade though.
__________________
Ryan - A good eye, a light foot, and a smart rig.
Bolt-ons are boring
AMERICAN JEEPER
My Build - http://www.wranglerforum.com/f118/pr...a00-74622.html
Rausch Creek Trip: 2014 Trip Coming Soon
GoldenSahara00 is offline   Quote Quick Reply
Old 06-04-2012, 01:11 PM   #23
I like beer and stuff

WF Supporting Member
 
Hammerwalk's Avatar
 
Join Date: Oct 2010
Location: Haslet, TX
Posts: 1,125
You got any better pics of what you did for your fix? I tried to look at what you posted but when you zoom in, it's all distorted. If all I need to do is buy $15 worth of parts to make a boot or whatever is needed, I'm all for that.
__________________
"And then one day you find
Ten years have got behind you
No one told you when to run
You missed the starting gun"
Hammerwalk is offline   Quote Quick Reply
Old 06-04-2012, 03:13 PM   #24
Rock-Rubber

WF Supporting Member
 
GoldenSahara00's Avatar
 
Join Date: Aug 2010
Location: SCPA
Posts: 16,446
You can buy the linkage TSB from jeep for not too much. Or push the shaft over and wrap it in electrical tape. Hahaha. I ran that for like 3 months. Those aren't my pics they are ones I have found or edited. Sorry about quality they are bad on my phone for some reason.
__________________
Ryan - A good eye, a light foot, and a smart rig.
Bolt-ons are boring
AMERICAN JEEPER
My Build - http://www.wranglerforum.com/f118/pr...a00-74622.html
Rausch Creek Trip: 2014 Trip Coming Soon
GoldenSahara00 is offline   Quote Quick Reply
Old 06-04-2012, 09:34 PM   #25
Jeeper
 
wavebacktothetj's Avatar
 
Join Date: Oct 2008
Location: Dothan, AL
Posts: 976
ok so I was under there and I think I might have found the problem, but I dont know how to fix it... im not the name of the part but any way so I get under the Jeep and start grabbing the links and when I pull down on the piece that Goldensahara had a red circle on the nut it pops ever so slightly but it sounds and feels about where im getting it on the floor board so I think that might be it! so how do I fix this I really dont want to dip into my bank account I just threw down some cash on armor last week so im done for the mean time, any suggestions? all the bushings look ok some dry rotting and squeaking nothing to bad
__________________
Dpg offroad ultimate kit- OME/JKS on 33's the rest is in my profile
wavebacktothetj is offline   Quote Quick Reply
Old 06-04-2012, 10:06 PM   #26
Jeeper
 
somis's Avatar
 
Join Date: Dec 2011
Location: Somis, CA
Posts: 584
I get a knock at idle sometimes after some while on the highway or after offroading. Its a stand still though and I feel it by my feet.
__________________
When in doubt...FLAT OUT!
somis is offline   Quote Quick Reply
Old 06-04-2012, 10:44 PM   #27
Rock-Rubber

WF Supporting Member
 
GoldenSahara00's Avatar
 
Join Date: Aug 2010
Location: SCPA
Posts: 16,446
Look at the second picture I have, the white one with labeled parts. Did you have the "boot" and "gasket" in tact on your linkage. Those are the pieces that allow the thump to happen.
__________________
Ryan - A good eye, a light foot, and a smart rig.
Bolt-ons are boring
AMERICAN JEEPER
My Build - http://www.wranglerforum.com/f118/pr...a00-74622.html
Rausch Creek Trip: 2014 Trip Coming Soon
GoldenSahara00 is offline   Quote Quick Reply
Old 06-04-2012, 11:00 PM   #28
Jeeper
 
wavebacktothetj's Avatar
 
Join Date: Oct 2008
Location: Dothan, AL
Posts: 976
yeah I have the boot and gasket still installed...
__________________
Dpg offroad ultimate kit- OME/JKS on 33's the rest is in my profile
wavebacktothetj is offline   Quote Quick Reply
Old 06-04-2012, 11:18 PM   #29
Rock-Rubber

WF Supporting Member
 
GoldenSahara00's Avatar
 
Join Date: Aug 2010
Location: SCPA
Posts: 16,446
Alright. Could be smacking off the back side like the other side of the mount. Your better off than me, my gasket was gone and the boot had a big hole lol.
__________________
Ryan - A good eye, a light foot, and a smart rig.
Bolt-ons are boring
AMERICAN JEEPER
My Build - http://www.wranglerforum.com/f118/pr...a00-74622.html
Rausch Creek Trip: 2014 Trip Coming Soon
GoldenSahara00 is offline   Quote Quick Reply
Old 06-04-2012, 11:19 PM   #30
Rock-Rubber

WF Supporting Member
 
GoldenSahara00's Avatar
 
Join Date: Aug 2010
Location: SCPA
Posts: 16,446
Do you have a drop bracket installed?

__________________
Ryan - A good eye, a light foot, and a smart rig.
Bolt-ons are boring
AMERICAN JEEPER
My Build - http://www.wranglerforum.com/f118/pr...a00-74622.html
Rausch Creek Trip: 2014 Trip Coming Soon
GoldenSahara00 is offline   Quote Quick Reply
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Jeep Wrangler Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

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.



Thread Tools

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 Off
Refbacks are Off




» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 03:58 AM.



Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC