Drive chain wobble under load - JeepForum.com
 
LinkBack Thread Tools
post #1 of 11 Old 04-01-2013, 12:56 PM Thread Starter
AAK11
Registered User
1998 ZJ 
 
Join Date: Apr 2013
Location: Verona
Posts: 6
Drive chain wobble under load

My 98 Grand Cherokee 5.2 is out of balance under load, even relatively small uphills creates the vibration.
In neutral or downhill it's quiet.

How can I isolate the culprit? Can I remove the front drive shaft, or the rear one and test drive the Jeep?
I'm hoping it's just a u-joint or the double cardan. Could it be the transfer case?
I just want to fix the part that needs it, not refresh both drive shafts if we can avoid it.
Thanks

AAK11 is offline  
Sponsored Links
Advertisement
 
post #2 of 11 Old 04-01-2013, 01:12 PM
AnotherRedZj
Registered User
1996 ZJ 
 
Join Date: Feb 2012
Location: fort walton beach
Posts: 2,378
if its not happening while in neutral, even reving it high, then it seems it would be a moving part. check both motor mounts and tranny mount first, then move on to drive shafts.

could also be under powered, check all plugs and wires, cap and rotor.....make sure your firing on all cylinders.

96 ZJ sittin up 6" on 35's with 4:56's and a 12k winch. Cuz...why the hell not!?
AnotherRedZj is offline  
post #3 of 11 Old 04-01-2013, 01:15 PM
AnotherRedZj
Registered User
1996 ZJ 
 
Join Date: Feb 2012
Location: fort walton beach
Posts: 2,378
also. if your driving a 98 GRAND cherokee......its not an xj.......its a zj

96 ZJ sittin up 6" on 35's with 4:56's and a 12k winch. Cuz...why the hell not!?
AnotherRedZj is offline  
post #4 of 11 Old 04-01-2013, 02:14 PM
Corrupt
Registered User
1998 ZJ 
 
Join Date: Mar 2011
Location: Fort Walton Beach
Posts: 391
You can remove your front drive shaft and drive it around. If the vibration is still there then you know it's not the front drive shaft and you can continue looking elsewhere.

***If you try to fail and succeed, then which have you done?


***RIP Ratmonkey!!***
Corrupt is offline  
post #5 of 11 Old 04-01-2013, 10:56 PM
dnuccio
Registered User
1995 ZJ 
 
Join Date: Jul 2012
Location: Phoenix
Posts: 3,483
you can remove the rear driveshaft and drive it as well, just go easy on the skinny pedal.

Reliability is relative
R.I.P. Ratmonkey
dnuccio is offline  
post #6 of 11 Old 04-02-2013, 06:19 AM
ratmonkey
R.I.P.
 
ratmonkey's Avatar
1997 ZJ 
 
Join Date: Dec 2006
Posts: 19,793
Quote:
Originally Posted by dnuccio View Post
you can remove the rear driveshaft and drive it as well, just go easy on the skinny pedal.
Then be sure to refill the transfer case after all the fluid drains out the back.

Can't remove the rear shaft.

'97 zj 5.2, some stuff, some other suff, and some things that even work sometimes.

ratmonkey is offline  
post #7 of 11 Old 04-02-2013, 06:23 AM
AnotherRedZj
Registered User
1996 ZJ 
 
Join Date: Feb 2012
Location: fort walton beach
Posts: 2,378
Quote:
Originally Posted by ratmonkey View Post
Then be sure to refill the transfer case after all the fluid drains out the back.

Can't remove the rear shaft.
This.

96 ZJ sittin up 6" on 35's with 4:56's and a 12k winch. Cuz...why the hell not!?
AnotherRedZj is offline  
post #8 of 11 Old 04-30-2013, 07:12 PM Thread Starter
AAK11
Registered User
1998 ZJ 
 
Join Date: Apr 2013
Location: Verona
Posts: 6
Still looking for the problem. With front drive shaft out, it still shows the vibration.

Fresh u-joints and balancing on the rear drive line didn't help.
I think I'm down to a few possibilities:
AAK11 is offline  
post #9 of 11 Old 04-30-2013, 08:05 PM Thread Starter
AAK11
Registered User
1998 ZJ 
 
Join Date: Apr 2013
Location: Verona
Posts: 6
1- transfer case (replaced with a used unit a year ago)
2- rear differential
3- wheel bearing
4- transmission/motor mounts

The vibration is a little at idle, but shows up on acceleration, especially under load uphill.
Engine speed and vehicle speed don't seem to have any influence.

Anyone have a good idea?
Thanks.
AAK11 is offline  
post #10 of 11 Old 05-28-2013, 08:20 AM Thread Starter
AAK11
Registered User
1998 ZJ 
 
Join Date: Apr 2013
Location: Verona
Posts: 6
Bmeyst is correct.
The ignition system was worn out. New cap, rotor, plugs and wires solved the problem completely.

thanks.
AAK11 is offline  
post #11 of 11 Old 05-28-2013, 06:01 PM
AnotherRedZj
Registered User
1996 ZJ 
 
Join Date: Feb 2012
Location: fort walton beach
Posts: 2,378
YAY!

I helped!

96 ZJ sittin up 6" on 35's with 4:56's and a 12k winch. Cuz...why the hell not!?
AnotherRedZj is offline  
Reply

Tags
drive shaft , u-joints , vibration

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



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