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Rear Seal Aggravation

Discussion in 'Early CJ5 and CJ6 Tech' started by Matt J, Feb 23, 2006.

  1. Feb 23, 2006
    Matt J

    Matt J New Member

    York, PA
    Joined:
    Sep 24, 2002
    Messages:
    23
    Been attempting to seal my Dana 18 for some time now, and have only ended up with puddles on the floor and ruined rear output seals. When I first installed the seal in its bore, using a big socket to drive it, I drove it clear to the back of the bore until it stopped. Installed and torqued the flanged, filled it up and came out to see a huge puddle under the jeep. Tore it apart and figured since I hadn't put any non hardening sealer on the splines or a light coat of rtv on the circumfrence of the seal, they were my culplrits.
    With a new seal, reinstalled the same way and drove the seal clear to the back. Torqued the flange, filled up and next morning new puddle. Tore it down again and noticed none of the white grease I put on the lips of the seal were on the contact surface of the flange. Ok, the flange and the seal aren't making contact or good contact and the oil has a clean path to the floor. The flange is getting tight the same place everytime and the same place it was when I took it apart.

    Does the seal not fit tight again the back of the bore? If not, any standard of how far in it goes?

    Also, the felt seals that go on the flange, I have two that are abouts 1/4'' thick each. Use one or both?

    'Preciate any guidance ya'll could give.
     
    Matt J, Feb 23, 2006
    #1
  2. Feb 24, 2006
    termin8ed

    termin8ed I didn't do it Staff Member

    Mason, MI
    Joined:
    Dec 22, 2002
    Messages:
    4,422
    You mentioned not putting any sealer on the splines the first time. Did you try that the second time?? I think there's only room for one of the felt seals. A second one wouldn't help stop the flow of oil, it more keeps dirt and dust out from the rubber seal.
    Hows the output yoke look? is it rough, pitted, or grooved on the sealing surface?

    Oh, and the seal should go all the way back to the bore. There was a thin paper gasket I "think" was put in from the factory. I've heard yes and no that they are needed. Usually they aren't included in rebuild kits. Try putting some rtv around the back of the bore before putting the seal in. Maybe its leaking around the outside of the seal and not around the yoke??

    hth.
     
    termin8ed, Feb 24, 2006
    #2
  3. Feb 24, 2006
    Matt J

    Matt J New Member

    York, PA
    Joined:
    Sep 24, 2002
    Messages:
    23
    The sealing surface of the yoke looks great, no grooves at all. Don't have the paper seal mentioned and can't remember if I pulled one out on disassembly. I'll be sure to coat the outside of the seal as well as the splines this time and try it again. Thanks for the advise!
     
    Matt J, Feb 24, 2006
    #3
  4. Feb 26, 2006
    Posimoto

    Posimoto Hopeless JEEP Addict

    Minden, Nevada
    Joined:
    Aug 7, 2003
    Messages:
    4,538
    Did you check the fit of the seal on the yoke sealing surface before you put the seal in? Maybe you have the wrong one. Just a thought.
     
    Posimoto, Feb 26, 2006
    #4
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