Vibration at highway speed?????? - JeepForum.com
 
LinkBack Thread Tools
post #1 of 5 Old 03-14-2003, 02:57 PM Thread Starter
jlr69s
Registered User
1985 CJ7 
 
Join Date: Nov 2002
Location: St. Augustine, FL
Posts: 170
Vibration at highway speed??????

Got my 96 ZJ about 5 months ago, so Im new to Jeeps. Right at about 90 mph I get a nice little vibration that pulsates, feels like its coming from the driveline. You know when you drive over those warning strips in the road before you come to a light or stop sign? Well thats what the vibration feels like. I hope its not because thats how fast my Jeep goes!! Any help would be great. Thanks!! Joey


Joe Riley
1985 CJ7 258ci
T-176 tranny with the Dana 300 transfer case
Dana 30 & AMC 20 differentials, one piece axles
32x11.50 Bridgestone Dueller A/T
jlr69s is offline  
Sponsored Links
Advertisement
 
post #2 of 5 Old 03-14-2003, 04:52 PM
Stocker
Registered User
 
Join Date: Nov 2002
Location: Jefferson State
Posts: 814
If it's too high in frequency to be a tire unbalance, I would suspect u-joints or possibly even cv joints starting to fail.

1995 5.2 ZJ Sold... but still in the family
Stocker
Stocker is offline  
post #3 of 5 Old 03-15-2003, 07:57 AM Thread Starter
jlr69s
Registered User
1985 CJ7 
 
Join Date: Nov 2002
Location: St. Augustine, FL
Posts: 170
What do you mean by too high in frequency to be an unbalanced tire? As in sound? Or feel?

Joe Riley
1985 CJ7 258ci
T-176 tranny with the Dana 300 transfer case
Dana 30 & AMC 20 differentials, one piece axles
32x11.50 Bridgestone Dueller A/T
jlr69s is offline  
post #4 of 5 Old 03-15-2003, 12:03 PM
Stocker
Registered User
 
Join Date: Nov 2002
Location: Jefferson State
Posts: 814
Well, typically an unbalanced tire will seem to cause a shaking feeling, but a u-joint will be a much faster or more high-speed vibration, probably more like a humming or thrumming feeling (and sound) in the vehicle.

BTW the difference is (IMO) because the wheel/tire is a large rotating mass, so it tends more to create a wobble you can feel. But a u-joint (or cv joint) is much smaller & lighter, and spins at a faster rate than tire rotation. For instance, if you have 3.42:1 axle ratio, the driveline will rotate 3.42 times for each tire rotation. So the smaller, lighter, more rapidly rotating mass will cause more of a hum, less of a wobble.

Kind of hard to describe but I hope this helps.

1995 5.2 ZJ Sold... but still in the family
Stocker
Stocker is offline  
post #5 of 5 Old 03-15-2003, 12:22 PM Thread Starter
jlr69s
Registered User
1985 CJ7 
 
Join Date: Nov 2002
Location: St. Augustine, FL
Posts: 170
okay thanks! Im going to be getting new wheels put on so the tires will get balanced again at the shop in a few weeks. Ill be able to eliminate that possibility then. But it does feel like more of a u-joint. Not really any more vibration on one side of the car but I can feel it like right in the seat. And the vibration is sort of a humming feeling that pulsates at like half second intervals. Dont feel any vibration around town, only when I get past 85mph. But thanks for the help. -Joey

Joe Riley
1985 CJ7 258ci
T-176 tranny with the Dana 300 transfer case
Dana 30 & AMC 20 differentials, one piece axles
32x11.50 Bridgestone Dueller A/T

Last edited by jlr69s; 03-15-2003 at 12:24 PM.
jlr69s 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
GC Ltd 2005 chassis vibration on highway rojen WK Grand Cherokee & XK Commander Forum 18 01-04-2015 02:59 PM
WJ Bad vibration/sound under acceleration at highway speeds chrisbranham WJ Grand Cherokee Forum 46 03-21-2013 08:53 AM
Vibration at highway speeds droldsw32 ZJ Grand Cherokee Forum 0 11-15-2009 12:53 PM
97 zj vibration at highway speeds....? ALOT of questions. jamoka3 ZJ Grand Cherokee Forum 7 07-14-2009 06:06 AM
Rumble/vibration at highway speeds Little Black ZJ ZJ Grand Cherokee Forum 4 09-09-2007 04:18 PM

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