JeepForum.com - Reply to Topic
Thread: 1990 YJ Clutch problems Reply to Thread
Title:
Message:

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










  Additional Options
Miscellaneous Options

  Topic Review (Newest First)
04-10-2020 07:53 PM
mukluk If the problem started immediately after the initial clutch and flywheel replacement, at this point I would suspect either the pilot bearing is bad or the clutch disc is sticking on the transmission input shaft splines.
04-10-2020 07:46 PM
BOYD II
1990 YJ Clutch problems

I have a 1990 YJ with the 4.2L engine and 5 speed transmission. I have replaced the clutch assembly with a new flywheel, pressure plate,slave cylinder and master cylinder. The problem I am having is the clutch will not disengage after I drive for about 5 minutes. I have replace the new master cylinder with several different brands, bled system and clutch works ok for couple of miles and then will not disengage again. I have bled the system by gravity, vacuum and pressure but still same issue. I called the tech support for the clutch master and slave cylinder and they tell me I don't have it bled correctly and there is air still trapped in the slave cylinder. I have bled the system and have put over 2 quarts of fluid thru it there is no way that there is still air in slave cylinder. I have contacted the tech support for the slave cylinder and now I am told that this internal slave cylinder design on the 1990 is a bad design flaw from Jeep . I have owned this jeep for over 20 years and never had an issue with the hydraulic side of the clutch system. My question is after replacing the master cylinder with 5 different brands and still the same issue I believe the slave cylinder is bad and not working as it should. There is no fluid loss or leaks in,on or under the jeep, I just believe I have a bad slave cylinder but I don't want to have to take the whole thing back apart to replace the slave cylinder, so I am asking for some help from the members of the Jeep Forum.

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

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