drive shaft/transmission vibrations - Off-Road Forums & Discussion Groups
Jeep-Short Wheelbase All discussion of short wheelbase Jeeps: CJ, TJ, YJ and JK

 
LinkBack Thread Tools Display Modes
post #1 of (permalink) Old 09-17-2002, 06:49 AM
**DONOTDELETE**
Guest
 
Posts: n/a
drive shaft/transmission vibrations

I have a 1982 6 cylinder cj-5. When it is in 4 low, and under stress, the stick shift will vibrate violently-enought that it has disengaged twice. In addition, it has sheared the universal joint twice. I have replaced motor mounts, and transmission mounts. Could it be a bent drive shaft, rear axle alingment, transmission linkage....
Sponsored Links
Advertisement
 
post #2 of (permalink) Old 09-17-2002, 07:14 AM
Moderator
 
Jim_Lou's Avatar
 
Join Date: Dec 2001
Location: Belleville, Illinois
Posts: 11,485
Thanks: 15
Thanked 22 Times in 17 Posts
         
Re: drive shaft/transmission vibrations

Which joint has gone bad twice? The problem is probably in that driveshaft. In low range, the balance of the drive train components isn't going to enter into it. Alignment of the differentials and transfer case could be the culprit. It would be helpful if we knew more about the drivetrain. That's a hint - read the first post on the board, and then put some more information in your profile.

If the driveshafts have cardan U-joints, the pinion shaft should be approximately parallel with the output shaft of the transfer case, and the joints must be in phase with each other. If there is a CV joint at the transfer case, the pinion shaft should be pointing approximately at the CV joint. Any other arrangement will cause a cyclic vibration in the power transmission through the shaft that will get transferred into the transmission and can cause problems if it's bad enough.

Your post says that the vibration is worse under load. That suggests a bad U-Joint that is allowing the alignment to get worse under load. Or it could be that the load is squeezing all of the slack and cushion out of the drivetrain and causing the vibrations to be transmitted into the transmission. Are you sure that all the joints are in good condition?
Jim_Lou is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Off-Road Forums & Discussion Groups 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 email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



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 On
Pingbacks are On
Refbacks are On

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