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grey oil in differential?

Discussion in 'Early CJ5 and CJ6 Tech' started by unclebill, Mar 18, 2009.

  1. Mar 18, 2009
    unclebill

    unclebill Banned

    a sun blasted...
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    what causes this grey/green?
    [​IMG]
     
    unclebill, Mar 18, 2009
    #1
  2. Mar 18, 2009
    69Rustj5

    69Rustj5 :)

    Logan, Ut.
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    I could be wrong but from my experience water.
     
    69Rustj5, Mar 18, 2009
    #2
  3. Mar 18, 2009
    jzeber

    jzeber Well-Known Member 2022 Sponsor

    Morgan Hill, Ca
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    x2
     
    jzeber, Mar 18, 2009
    #3
  4. Mar 19, 2009
    w3srl

    w3srl All-around swell dude Staff Member

    Port Orange, FL
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    Make it unanimous.

    That's some nasty looking goop in there! :shock:
     
    w3srl, Mar 19, 2009
    #4
  5. Mar 19, 2009
    80cj

    80cj Member

    Hawaii
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    Water. Probably smells nasty too.
     
    80cj, Mar 19, 2009
    #5
  6. Mar 19, 2009
    DrDanteIII

    DrDanteIII Master Procrastinator

    Milford NJ 08848
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    1,519
    gear oil always smells nasty.


    Bill,
    I would wipe it out as best as possible, are refill with cheap 75w-90 gear oil. Drive it around a bit, anc change it again in 3 or 400 miles.
     
    DrDanteIII, Mar 19, 2009
    #6
  7. Mar 19, 2009
    unclebill

    unclebill Banned

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    thanks
    thats what i did.
     
    unclebill, Mar 19, 2009
    #7
  8. Mar 19, 2009
    BlueFlu

    BlueFlu past owner of some ecj5's

    Hermitage, TN
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    FWIW when found them like that ( watered down ) we used brake clean to clean them up, then did the refill and drain after a few trips.
     
    BlueFlu, Mar 19, 2009
    #8
  9. Mar 19, 2009
    jpflat2a

    jpflat2a what's that noise?

    Hermosa, SD
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    mmm...infants and diapers....
     
    jpflat2a, Mar 19, 2009
    #9
  10. Mar 19, 2009
    hudsonhawk

    hudsonhawk Well-Known Member

    North Texas...
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    Feb 4, 2005
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    Water emulsified in the oil. You have already taken the steps to fix it.
     
    hudsonhawk, Mar 19, 2009
    #10
  11. Mar 19, 2009
    74CJMatlock

    74CJMatlock New Member

    Knoxville, TN
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    Do you have a vent tube on the differential? If not, I'd look in to getting one. That's probably where your water's coming in.
     
    74CJMatlock, Mar 19, 2009
    #11
  12. Mar 19, 2009
    unclebill

    unclebill Banned

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    it's just got that nipple with a loose fitting cap on it.
     
    unclebill, Mar 19, 2009
    #12
  13. Mar 19, 2009
    Patrick

    Patrick Super Moderator Staff Member

    Los Alamos, NM
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    It's usually mostly condensation...
     
    Patrick, Mar 19, 2009
    #13
  14. Mar 19, 2009
    unclebill

    unclebill Banned

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    like i said before.
    from the looks of it the PO liked to drive around in water.
    but he wasn't big on .maintenance ....
     
    unclebill, Mar 19, 2009
    #14
  15. Mar 19, 2009
    jzeber

    jzeber Well-Known Member 2022 Sponsor

    Morgan Hill, Ca
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    I ran my diff vents to the firewall, never had any problems with water.
     
    jzeber, Mar 19, 2009
    #15
  16. Mar 20, 2009
    Patrick

    Patrick Super Moderator Staff Member

    Los Alamos, NM
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    I agree with vent hoses. Mine all run up high with filters on them.
    However, I've seen more water in cases from sitting for long periods of time. Condensation is a real factor.
     
    Patrick, Mar 20, 2009
    #16
  17. Mar 20, 2009
    unclebill

    unclebill Banned

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    wow
    i wouldnt think Condensation would have anything to do with it.
    i learn sumpin ever day.
    even when i dont try!:)
     
    unclebill, Mar 20, 2009
    #17
  18. Mar 20, 2009
    Patrick

    Patrick Super Moderator Staff Member

    Los Alamos, NM
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    I've seen several that were left to sit with no water, and drained after xx years and had several cups of water in them..

    Most recent was a CJ6 chassis my Dad and I bought. Trans and transfer both had water in them, and they were bolted together, had all the seals in them, and were covered up with an old plastic bed liner. They never got rained or snowed on...
     
    Patrick, Mar 20, 2009
    #18
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