1974 cj5 t15a and dana 20 tcase - JeepForum.com
 
LinkBack Thread Tools
post #1 of 4 Old 07-10-2011, 01:01 PM Thread Starter
Banshee600
Registered User
1992 YJ Wrangler 
 
Join Date: Apr 2009
Location: Washington st
Posts: 3
1974 cj5 t15a and dana 20 tcase

Hi guys I have been looking on the site and can not find the anwser to a problem a buddy is having. with his cj5 74 with a t15A and dana 20 tcase when he fills the tranny with gear oil it will over fill into the tcase why does this happen is the gasket between the 2 bad ? he serviced both filled to the fill plug drove about 10 miles rechecked tran was a little over a pint low.

Banshee600 is offline  
Sponsored Links
Advertisement
 
post #2 of 4 Old 07-10-2011, 01:22 PM
C_H2O
Registered User
1953 CJ3B 
 
Join Date: Jul 2011
Location: Chesapeake
Posts: 6
Tranny/T-Case

Don't know about yours, but my T90/18 has a shaft seal
on the output of the tranny to prevent exchanging of fluids.
I would think all of them do to prevent mixing of what could be incompatible
fluids.
hope that helps.....
C_H2O is offline  
post #3 of 4 Old 07-10-2011, 05:35 PM
SoK66
Registered User
2009 JK Wrangler 
 
Join Date: Jul 2011
Location: Durango
Posts: 1,430
There should be a lip seal on the transmission mainshaft rear bearing carrier. At the rear end of the mainshaft is the input gear for the transfer case, which is held in place by a large nylock nut. The seal rides on the input gear. There should also be a paper gasket between the transmission and the transfer case that completely seals the two and prevents fluid swapping. I just had my CJ5's T150 and Dana 20 apart partly for this reason and found that the nut holding the t-case input gear was loose, allowing the gear to move and the seal to leak fluid into the t-case. Also, the last monkey that had worked on them had not only not torqued the nut properly, he'd installed the wrong gasket between the two boxes. The overhaul & seal kits sold for these boxes will include three gaskets. Use the one that has NO holes in it other than for the input gear and the mounting bolts.

This is a pretty simple repair that can be done with the trans still installed. The boxes both use the same 80w GL4 (low sulphur) manual trans oil, but the natural action of the trans will pump all the oil into the t-case, which will them puke it out from every seal, vent, etc. FWIW, there was a recall back in the day on this. The input gear seal was installed backwards on some transmissions.
SoK66 is offline  
post #4 of 4 Old 07-10-2011, 06:34 PM Thread Starter
Banshee600
Registered User
1992 YJ Wrangler 
 
Join Date: Apr 2009
Location: Washington st
Posts: 3
thanks we will look into it I was thinking there had to be something to stop the from flowing together
Banshee600 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
1974 cj5 dana 44 rear susp. part? ol78cj Jeep CJ Forum 4 03-22-2011 11:33 PM
Swapping a T150 out for a T15a? back40wes Jeep CJ Forum 8 03-25-2010 10:27 AM
ARB Locker CJ 5 1974 Dana 30 Fireman101 Jeep CJ Forum 10 07-21-2009 06:27 PM
1974 Dana 44/30 fit on 1977 CJ7 bluesman423 Jeep CJ Forum 8 06-30-2009 08:06 PM
dana 18 to a t15a dorian Jeep CJ Forum 0 02-25-2009 06:01 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