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Dana 18 output shaft not seating in front bearing cap?

Discussion in 'Early CJ5 and CJ6 Tech' started by alpina72, Jun 26, 2015.

  1. Jun 26, 2015
    alpina72

    alpina72 Member

    Georgia
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    Round two of reassembly of my transfer case, this time without that damn interlock pin.
    The output shaft doesn't seem to go far enough into the front bearing cap to seat the bearing.
    Only thing I can think of is that the pilot bushing is holding me up.
    When I replaced it I pressed it in flush with the end of the shaft and hand reamed it to .626 dia. Should I have pressed it further into the shaft?
    Also part of my rebuild was switching over to one of Herms twin stick conversions. Could the issue be with the front bearing cap itself being shorter or something like that?
    Haven't even gotten to the point of installing and shimming the rear cap.
     
    Last edited: Jun 26, 2015
  2. Jun 26, 2015
    alpina72

    alpina72 Member

    Georgia
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    [​IMG]
    Here's what I'm looking at.
    Looks wrong to me. Shifts fine at this point.
     
  3. Jun 26, 2015
    uncamonkey

    uncamonkey Member

    Greeley CO
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    I've rebuilt many D18's. never seen anything quite like that. What happens when you put the rest of it together?
     
  4. Jun 26, 2015
    alpina72

    alpina72 Member

    Georgia
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    I'm guessing it's going to bind up unless I throw a 1/4" or more worth of shims on it.
    Tried tapping it in with a brass hammer and that's as far as it goes without really hammering on it which I'm pretty sure I shouldn't have to or want to do.
     
  5. Jun 26, 2015
    alpina72

    alpina72 Member

    Georgia
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    Going to try marking up the end of the shaft with a sharpie and see just how much engagement I'm getting into the pilot bushing.
     
  6. Jun 27, 2015
    alpina72

    alpina72 Member

    Georgia
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    The front shaft is going fully into the main shaft. It can't go any further. Only remedy I can see is to press the pilot bushing further in. But is that right?
    It's like the bearing cap itself is to short??
     
  7. Jun 27, 2015
    alpina72

    alpina72 Member

    Georgia
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    Have gone through the factory service manual, the Novak instructions and a few online guides. I can't see that I'm doung anything wrong.
     
  8. Jun 27, 2015
    uncamonkey

    uncamonkey Member

    Greeley CO
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    Well, I never had to put that many shims in. the bearing doesn't look like it's at near to it's correct place, You say it shifts OK. Are the shift forks installed right?
     
  9. Jun 27, 2015
    alpina72

    alpina72 Member

    Georgia
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    Forks are identical to how I remember taking them apart and match up with every picture I've found.
    But I'll check it again... has to be a dumb *** mistake on my part somewhere
     
  10. Jun 27, 2015
    alpina72

    alpina72 Member

    Georgia
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    [​IMG]

    Front fork... this is correct, yes?
    Pardon the crud looking stuff. I was smearing everything with Vaseline as I assembled it. Now it's become a curse.
     
    Last edited: Jun 27, 2015
  11. Jun 27, 2015
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
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    It seems to me that the bushing goes further in, but I could be wrong. Did you test fit everything before assembly? I like to do that to get a feel for everything and that it will fit.
     
  12. Jun 27, 2015
    Mcruff

    Mcruff Earlycj5 Machinist

    Albertville, AL
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    Look down inside the bushing and make sure the tab where these things are made isn't sticking out and causing the shaft not to seat. If i remember correctly some of these bushing are roll formed from sheet material. Also make sure your front output is all the way forward.
     
  13. Jun 27, 2015
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
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    That's interesting. I checked my old parts and the bushing is further in. I have 3 that are like that. The one output shaft I have has a machined surface that goes into the bushing, but it is not machined all the way and it wouldn't fit into the bushing thus the bushing is pressed in far enough to compensate for that.

    Your description sounds like the output shaft you have is machined different though. Have you got a picture of the output shaft bushing surface in particular?
     
  14. Jun 27, 2015
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
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    FWIW a surplus output shaft I looked at is machined as I described and clearly would require the bushing to be pressed in far enough to equal the unmachined part of the shaft.
     
  15. Jun 28, 2015
    alpina72

    alpina72 Member

    Georgia
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    Here's the front output shaft
    [​IMG]
    The original bushing was loose and I just plucked it out with my finger. So I don't know how far it was actually in.
     
  16. Jun 28, 2015
    Glenn

    Glenn Kinda grumpy old man Staff Member

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    Well, you can see the lip where the smooth machined surface ends so that non machined surface amount is how far it was in. ;)
     
  17. Jun 28, 2015
    Glenn

    Glenn Kinda grumpy old man Staff Member

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    Last edited: Jun 28, 2015
  18. Jun 28, 2015
    alpina72

    alpina72 Member

    Georgia
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    Thanks Glenn.
    I'll press it in further and go from there.
     
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