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D44 - Gear Oil from Vent Hole

Discussion in 'Early CJ5 and CJ6 Tech' started by Boyink, Jul 31, 2004.

  1. Jul 31, 2004
    Boyink

    Boyink Super Moderator Staff Member

    Tulsa, OK
    Joined:
    Sep 20, 2002
    Messages:
    6,197
    Does it make sense that my D44 leaks gear oil from the vent hole when I store it with the pumpkin pointed up? Or do I have a bad seal?
     
    Boyink, Jul 31, 2004
    #1
  2. Jul 31, 2004
    jeepngem

    jeepngem New Member

    Riverside,...
    Joined:
    Aug 16, 2003
    Messages:
    47
    Mike: Yes the oil will leak out the vent....the inner seal is next to the rear wheel bearing on a 44. Not like the front 25, 27, 30 models where the seal is located next to the carrier bearings. So the oil on a model 44 can run down both axle tubes. If you do alot of sidehilling you could run the ring and pinion dry. Good Luck!! Glenn
     
    jeepngem, Jul 31, 2004
    #2
  3. Jul 31, 2004
    Patrick

    Patrick Super Moderator Staff Member

    Los Alamos, NM
    Joined:
    Sep 22, 2002
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    8,360
    Is your vent simply a small hole in the back of the axle tube, DS, like mine?
     
    Patrick, Jul 31, 2004
    #3
  4. Aug 1, 2004
    fred

    fred Member

    Dallas, Texas
    Joined:
    Jun 29, 2004
    Messages:
    76
    The only way I have found to correct this is to increase the cross sectional area of the vent by:
    1: increase the fitting/hose size.
    2: add another vent (fitting/hose) of same same or larger (so you have two vents). This can be done on the opposite side of the axle as existing vent or added to diff cover on passenger side on backside of ring gear (less oil turbulence).

    (Make sure you have not over filled diff)
     
    fred, Aug 1, 2004
    #4
  5. Aug 1, 2004
    Boyink

    Boyink Super Moderator Staff Member

    Tulsa, OK
    Joined:
    Sep 20, 2002
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    Yep, sorry should have made that clear (thought all the early D44's were setup this way.)
     
    Boyink, Aug 1, 2004
    #5
  6. Aug 1, 2004
    Patrick

    Patrick Super Moderator Staff Member

    Los Alamos, NM
    Joined:
    Sep 22, 2002
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    8,360
    Ok, so as stated, there are no seals between the diff and the vent, so yes, it will leak when turned pinion up.....
     
    Patrick, Aug 1, 2004
    #6
  7. Aug 1, 2004
    jeepngem

    jeepngem New Member

    Riverside,...
    Joined:
    Aug 16, 2003
    Messages:
    47
    Pat: Yes :D Glenn
     
    jeepngem, Aug 1, 2004
    #7
  8. Aug 1, 2004
    Boyink

    Boyink Super Moderator Staff Member

    Tulsa, OK
    Joined:
    Sep 20, 2002
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    Thanks guys...
     
    Boyink, Aug 1, 2004
    #8
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