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Pinion oil seal leak??

Discussion in 'Early CJ5 and CJ6 Tech' started by russo, Mar 11, 2006.

  1. Mar 11, 2006
    russo

    russo Hope is not a method

    Norris, Tennessee
    Joined:
    Oct 28, 2005
    Messages:
    498
    Well I did it - changed all my oils and now I have leaks. I swear I put a lot more oil in than I took out:rofl: . Maybe I should just let them leak down below the leak level and be happy.

    Anyway - I have managed to fix most of the leaks but I have a small leak in my Dana 44 at what I think may be the pinion shaft seal. The rebuilder's manual and service manual are not really clear on this one (or not to my mind at least).

    Anybody ever change one? Is it very difficult and does it require any special tools?
     
    russo, Mar 11, 2006
    #1
  2. Mar 11, 2006
    w3srl

    w3srl All-around swell dude Staff Member

    Port Orange, FL
    Joined:
    Nov 6, 2002
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    4,275
    No, it's not especially difficult to replace a pinion seal. Start by pulling the cover a to drain the gear oil. You'll need to drop the driveshaft, and get the pinion yoke nut off. This usually is best done with a hefty air impact gun, or a 3/4" drive breaker bar and a long pipe. Make sure your socket fits solidly on the nut so that you don't end up stripping the corners off it. :rofl: (Sometimes a thin-walled socket will be needed to get down inside the yoke.) Then you can use a seal-puller tool to puncture and pry out the old seal, and then use a seal driver, a socket, or a pipe fitting of the correct diameter to evenly drive the new seal into place. Clean the pinion splines and the inside of the yoke with brake cleaner or solvent and let dry. Then put some sealer on the splines , some gear oil on the seal and tap the yoke back into place. Torque the nut back to specs and refill the differential.

    See, nuttin' to it! :D
     
    w3srl, Mar 11, 2006
    #2
  3. Mar 11, 2006
    Patrick

    Patrick Super Moderator Staff Member

    Los Alamos, NM
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    Sep 22, 2002
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    8,360
    You don't have to pull the diff cover and drain the oil. Just top it off after the seal is replaced... The pinion seal should take about 45 min. to replace, if you don't have pnuematic tools and a hoist....
     
    Patrick, Mar 11, 2006
    #3
  4. Mar 11, 2006
    w3srl

    w3srl All-around swell dude Staff Member

    Port Orange, FL
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    Patrick is correct, but have a pan ready to catch the oil when you remove the yoke!
     
    w3srl, Mar 11, 2006
    #4
  5. Mar 11, 2006
    Old Bill

    Old Bill Aggressively passive....

    Really Southern...
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    Nov 12, 2004
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    Also, examine the yoke for scoring where the seal has been riding. If it's rough, you'll just tear up the new seal....
     
    Old Bill, Mar 11, 2006
    #5
  6. Mar 11, 2006
    Chuck

    Chuck Sponsor

    Southshore Ma
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    Sep 19, 2004
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    This day in 1946, the dealer would quote a time of one and one half hour, and charge as low as $1.90 or as high as $4.50 to complete that job.
     
    Chuck, Mar 11, 2006
    #6
  7. Mar 11, 2006
    Patrick

    Patrick Super Moderator Staff Member

    Los Alamos, NM
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    Sep 22, 2002
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    8,360
    And if so, clean it up with some emery cloth, and install a ready sleave...
     
    Patrick, Mar 11, 2006
    #7
  8. Mar 12, 2006
    russo

    russo Hope is not a method

    Norris, Tennessee
    Joined:
    Oct 28, 2005
    Messages:
    498
    Thanks all. I think I'll give it a shot while I still have the tub off. So no need to pull the pinion shaft?
     
    russo, Mar 12, 2006
    #8
  9. Mar 12, 2006
    Chuck

    Chuck Sponsor

    Southshore Ma
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    Sep 19, 2004
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    No
     
    Chuck, Mar 12, 2006
    #9
  10. Apr 2, 2009
    nwedgar

    nwedgar Now with TBI!

    Newnan, Georgia
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    Oct 26, 2005
    Messages:
    1,785
    couldn't find the delete button. sorry.
     
    Last edited: Apr 2, 2009
    nwedgar, Apr 2, 2009
    #10
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