rattle/knock hear at 40+ mph - Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > TJ Jeep Wrangler Forum > TJ Tech Forum

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 08-11-2009, 10:08 AM   #1
Jeeper
 
Join Date: Jul 2009
Posts: 26
rattle/knock hear at 40+ mph

Hello all. I have a 97 Sport. I was recently driving on the highway, at about 60mph. Suddenly, I felt a bang as though I hit a good bump in the road (and I may have). After that, I heard what I would describe as a rattle, or knock, coming from around the passenger floor area (I think).
I pulled over immediately, looked under the Jeep, but didn't notice anything out of the ordinary. I got back in, started driving and all seemed fine until I reached about 40mph. Then the rattle/knock started again. I continued driving home without any other issues (about 8 miles).
Shifting seems normal (manual). I've notice that the noise is not related to a particular gear, because I can hear it in 4th as well as 5th at 40+. In 4th at 30-35mph, no noise that I can tell. Also, I only notice noise at 40+ when pressing on the accelorator. Once I take my foot off the pedal, even when going 40+, the noise is not present. Again, aside from the noise, the Jeep appears to be functioning normally.

Any ideas what could be causing that noise? Any help would be greatly appreciated.

Tuff_Mudd is offline   Quote
Old 08-11-2009, 10:10 AM   #2
IITYWTMWYBMAB

WF Supporting Member
::WF Administrator::
 
4Jeepn's Avatar
 
Join Date: Apr 2005
Location: Florence, KY
Posts: 10,783
Could be lots of things.. muffler hanger, u-joint, t-case skid.. How hard did you hit? If it starts and stops with the gas.. I would check into the u-joints first..both drive shaft and then axle while your checking..

__________________
79.96.85.00.01.97.00.97.93.97.95.94
CJ.XJ.CJ. TJ. TJ.ZJ. TJ.TJ. ZJ.ZJ.YJ. XJ
4Jeepn is offline   Quote
Old 08-11-2009, 11:25 AM   #3
Jeeper
 
mudslinger150's Avatar
 
Join Date: Jul 2009
Location: Northern VT
Posts: 1,128
maybe your internals of your cat let go when u hit a bump. and around 40 mph or so it makes just the right vibration to rattle the internals, sound crazy but it happened to me. Park it, get under the jeep and kick or shake your exhaust, if its your cat you'll hear the rattle
__________________
Mitch

Vermont
The Green Mountain State

http://www.cardomain.com/ride/3821222

http://www.youtube.com/watch?v=20dGUB6uJcQ
mudslinger150 is offline   Quote
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not 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


Similar Threads
Thread Thread Starter Forum Replies Last Post
anyone ever hear of retreaded mud tires? 4bangertj TJ General Discussion Forum 20 07-27-2012 06:42 PM
New hear Beachbead WF New Member Check In 13 06-08-2009 03:20 PM
Lets hear it for those GATORS!! Licht Off-Topic 16 10-03-2007 11:14 AM
Anyone else hear about a possible HEMI in the new Wrangler??? pita JK Tech Forum 18 05-13-2007 08:21 PM
Hello All! Newbie hear..... Badmonkey WF New Member Check In 2 10-15-2005 04:54 PM



Download our Mobile App

» Featured Product

All times are GMT -5. The time now is 10:39 PM.


User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2015 DragonByte Technologies Ltd.

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