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Transfer Case Oil Change

Discussion in 'Early CJ5 and CJ6 Tech' started by Rozcoking23, Aug 1, 2016.

  1. Rozcoking23

    Rozcoking23 RUN & GET BIT! 2024 Sponsor

    I was changing oil in my transfer case, (Spicer 18), and when I removed the plug to let out the oil it sounded like it was breaking a seal and I could hear what sounded like an air leak. Is this normal for the transfer case to have a vacuum? This is a rebuilt case with 2500 miles on it.
     
    Rozcoking23, Aug 1, 2016
    #1
  2. Oldriginal86

    Oldriginal86 Member

    Sounds as if the breather is clogged. Remove and blow air through it. Wash out with solvent.
     
    Oldriginal86, Aug 1, 2016
    #2
  3. Rozcoking23

    Rozcoking23 RUN & GET BIT! 2024 Sponsor

    Thank you, I'll try that
     
    Rozcoking23, Aug 1, 2016
    #3
  4. ITLKSEZ

    ITLKSEZ Hope for the best, prepare for the worst

    I'd think "hissing" is ok. The breather isn't really designed to let mass amounts of air (i.e., dirt, water...) in.

    Now if it were drawing such a vacuum where it was going "glug, glug, glug...", then there might be an issue.
     
    ITLKSEZ, Aug 2, 2016
    #4
  5. 1960willyscj5

    1960willyscj5 Well-Known Member

    how would it create a vacuum? Especially if it shares oil with the tranny, which a lot do.
     
    1960willyscj5, Aug 3, 2016
    #5