CJ5 Leaking from output seal Dana 20...2 seals later still chasing leak. - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep CJ Forum > CJ5 Leaking from output seal Dana 20...2 seals later still chasing leak.

FS: 2007-2013 Jeep Wrangler "HALO" Angel Eye KitFS: Wranger BRIGHT License Plate LED! Just $3! Great valueRough Country Lift Kits and Parts!

Reply
Unread 05-21-2013, 02:54 PM   #1
Jamesromeos
Registered User
1979 CJ5 
 
Join Date: Oct 2012
Location: Danvers, Massachusetts
Posts: 246
CJ5 Leaking from output seal Dana 20...2 seals later still chasing leak.

I don't know what to do, I have put 2 rear output seals in the last 4 months in my CJ5. It is the output seal coming out of the rear of the transfer case going to rear drive shaft. I pressure washed the tranny and found that it was coming from this point. I replaced it for the second time the other day and it is spraying fluid all over the exhaust and tub, and spraying all over the fuel tank. It is the correct seal, I also put it in correctly. What could be causing this????? It is driving me insane, the smell of it burning, as well as it soaking the underside of the tub. Could it be a scored yolk? The Jeep has a 4" BDS lift, and a stock Drive shaft. It does have a transfer case drop, and shims for the rear axle. I am at a loss!!!

Jamesromeos is offline   Reply With Quote
Unread 05-21-2013, 06:06 PM   #2
hmantractors
Registered User
1979 CJ7 
 
Join Date: Jul 2011
Posts: 81
Oil seal

Your yoke, is there a groove in it? Can you hang a finger nail in it? Is there a burr on the yoke that may be cutting the new seal? Does the shaft on the transfer case have bearing wear causing the yoke to have to much runout which will cause the seal to leak? A lot of questions. You may just need to go to NAPA with your yoke and get a Speedi-Sleeve to repair your yoke another new seal and be on your merry way.
hmantractors is offline   Reply With Quote
Unread 05-21-2013, 09:12 PM   #3
lordhelemt
Registered User
 
Join Date: May 2013
Posts: 30
If there are no burrs on the yoke check to make sure your vent isn't clogged. If the tcase can't breath the pressure it's going to blow at the weakest point.
lordhelemt is offline   Reply With Quote
Unread 05-21-2013, 11:21 PM   #4
Jamesromeos
Registered User
1979 CJ5 
 
Join Date: Oct 2012
Location: Danvers, Massachusetts
Posts: 246
How do you check the vent? Remove and put compressed air through?
Jamesromeos is offline   Reply With Quote
Unread 05-21-2013, 11:46 PM   #5
WSS
Ps:91
 
WSS's Avatar
1972 CJ5 
 
Join Date: Oct 2012
Location: Chino, Ca
Posts: 2,143
How did the first seal look like when you took it out?
__________________
www.metaltechus.com

Our Yellow 72 CJ5 build thread

Yellow Jeep club member #73802
WSS is offline   Reply With Quote
Unread 05-22-2013, 04:34 AM   #6
Jamesromeos
Registered User
1979 CJ5 
 
Join Date: Oct 2012
Location: Danvers, Massachusetts
Posts: 246
To me, the seal looked fine. No cuts in the rubber at all.
Jamesromeos is offline   Reply With Quote
Unread 05-22-2013, 05:15 AM   #7
lordhelemt
Registered User
 
Join Date: May 2013
Posts: 30
Quote:
Originally Posted by Jamesromeos View Post
How do you check the vent? Remove and put compressed air through?
I'd remove it and blow with compressed air. Also check the valve at the top.
lordhelemt is offline   Reply With Quote
Unread 05-22-2013, 08:10 AM   #8
Jamesromeos
Registered User
1979 CJ5 
 
Join Date: Oct 2012
Location: Danvers, Massachusetts
Posts: 246
the vent was fine, I removed and inspected the yolk, which showed minor wear, no burrs. There was no side to side motion nor up and down on the bearing. I'm at a loss...should I just replace the yolk...could the dust shield be eating the rubber seal? Could I eliminate the dust shield?
Jamesromeos is offline   Reply With Quote
Unread 05-22-2013, 09:34 AM   #9
lordhelemt
Registered User
 
Join Date: May 2013
Posts: 30
I'm stumped. Dumb questiom but ate you sure you're using the correct seal? Did you dry fit against the yoke before installing it?
lordhelemt is offline   Reply With Quote
Unread 05-22-2013, 10:38 AM   #10
AlexThePhotoGuy
Registered User
1985 CJ7 
 
Join Date: Feb 2013
Location: Decatur, GEORGIA
Posts: 126
My t-case is leaking as well (but so dirty at the moment it looks like it's leaking from everywhere!). I'm a newbie... where is the t-case vent?
AlexThePhotoGuy is offline   Reply With Quote
Unread 05-22-2013, 12:35 PM   #11
Jamesromeos
Registered User
1979 CJ5 
 
Join Date: Oct 2012
Location: Danvers, Massachusetts
Posts: 246
Vent on top of the rear output of the tranny tcase where the driveshaft meets trans.
Jamesromeos is offline   Reply With Quote
Unread 05-22-2013, 12:36 PM   #12
Jamesromeos
Registered User
1979 CJ5 
 
Join Date: Oct 2012
Location: Danvers, Massachusetts
Posts: 246
I did dry fit, but the dust seal seemed to press into the old seal rubber with its taper.
Jamesromeos is offline   Reply With Quote
Unread 05-22-2013, 03:23 PM   #13
WSS
Ps:91
 
WSS's Avatar
1972 CJ5 
 
Join Date: Oct 2012
Location: Chino, Ca
Posts: 2,143
Time for some pics! A mystery.
__________________
www.metaltechus.com

Our Yellow 72 CJ5 build thread

Yellow Jeep club member #73802
WSS is offline   Reply With Quote
Unread 05-22-2013, 03:25 PM   #14
lordhelemt
Registered User
 
Join Date: May 2013
Posts: 30
Yes send pics
lordhelemt is offline   Reply With Quote
Unread 05-22-2013, 05:47 PM   #15
keith460
Jeep. There's Only One
 
keith460's Avatar
1984 CJ7 
 
Join Date: Jan 2007
Location: Doylestown, PA
Posts: 4,734
Its probably a worn in shaft groove on the yoke that is causing the leak problem. I had a similar problem after finishing the restoration of my Jeep and the yoke started leaking after driving it around. I'm a stickler when it comes to leaks and I seek them out no matter where they are coming from and make the necessary repairs to stop them no matter what the cost. I had to purchase a new yoke to stop it from leaking.

A small groove in the shaft that makes contact with the sealing surface will leak every time. My advice is to purchase a new yoke, use sealant on the splines before installing and coat the shaft surface with oil or Vaseline where it makes contact with the seal.
__________________
.
1984 CJ-7 Renegade
__________________

Restoration Thread:http://www.jeepsunlimited.com/forums...d.php?t=434226
keith460 is offline   Reply With Quote




Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.