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Replacing seal on Dana 27a front differential

Discussion in 'Early CJ5 and CJ6 Tech' started by Bill67cj5, Sep 5, 2015.

  1. Sep 5, 2015
    Bill67cj5

    Bill67cj5 Member

    Franklin, TN
    Joined:
    Apr 12, 2014
    Messages:
    86
    What's the best way to hold the front drive shaft still so I can losen the nuts on the spindle yoke? With front drive disengaged the shaft just turns. When I engage it, the jeep pulls forward as the assembly turns while I try to losen the nuts. Can I hold the drive shaft with a pipe wrench while loosening the nuts?
     
    Bill67cj5, Sep 5, 2015
    #1
  2. Sep 5, 2015
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
    Joined:
    Sep 21, 2002
    Messages:
    12,378
    I assume you are talking about the pinion yoke? There should only be one nut, and the best way is to use an impact wrench. Otherwise you can use a pipe wrench as a last resort. Take care not to gouge it up with the pipe wrench, at least use some heavy rags to protect the yoke, and don't grab it where the u-joint sits.
     
    Glenn, Sep 5, 2015
    #2
  3. Sep 5, 2015
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
    Joined:
    Sep 21, 2002
    Messages:
    12,378
    Before using the pipe wrench trying having someone step on the brakes, that ought to work.
     
    Glenn, Sep 5, 2015
    #3
  4. Sep 5, 2015
    Bill67cj5

    Bill67cj5 Member

    Franklin, TN
    Joined:
    Apr 12, 2014
    Messages:
    86
    Ah, well that's a common sense approach. I'll get the wife to step on the brakes.......hopefully she doesn't let up!
     
    Bill67cj5, Sep 5, 2015
    #4
  5. Sep 6, 2015
    oddfirejeeper

    oddfirejeeper Active Member

    Hamilton, MI
    Joined:
    May 5, 2004
    Messages:
    1,253
    what glenn said about the impact. it just snaps the nut loose instead of trying to muscle it off which gives you what your dealing with.
     
    oddfirejeeper, Sep 6, 2015
    #5
  6. Sep 6, 2015
    eti engineer

    eti engineer Member

    Great Central...
    Joined:
    Jan 24, 2015
    Messages:
    601
    IMHO, you can't own a Jeep without owning air tools. My air impact was invaluable in rebuilding my engine and tranny. Just the front crankshaft nut alone proved that I wasn't going to get it loose without air tools.
     
    eti engineer, Sep 6, 2015
    #6
  7. Sep 6, 2015
    SFaulken

    SFaulken Active Member

    Bellevue, WA
    Joined:
    May 24, 2011
    Messages:
    1,178
    If Air isn't an option, get an electric impact. They';re a little pricey, but cheaper than a gun and compressor. I don't have a compressor at the moment, and the 120VAC (Plug in) 1/2" impact I picked up at Lowes is a good subtitute.
     
    SFaulken, Sep 6, 2015
    #7
  8. Sep 7, 2015
    oddfirejeeper

    oddfirejeeper Active Member

    Hamilton, MI
    Joined:
    May 5, 2004
    Messages:
    1,253
    yeah those are the cat's meow when you don't have air. a friend of mine brings his every time we go out off roading
     
    oddfirejeeper, Sep 7, 2015
    #8
  9. Sep 7, 2015
    aekdbbop

    aekdbbop Member

    TN
    Joined:
    Jul 31, 2014
    Messages:
    403
    Doing that seal this week also.. Does a seal puller work pretty well for this? Any other tips?
     
    aekdbbop, Sep 7, 2015
    #9
  10. Sep 8, 2015
    oddfirejeeper

    oddfirejeeper Active Member

    Hamilton, MI
    Joined:
    May 5, 2004
    Messages:
    1,253
    yeah seal puller is ideal
     
    oddfirejeeper, Sep 8, 2015
    #10
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