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School Me On D30s

Discussion in 'Jeepster Commando and Commando Tech' started by ANTHONY DRANE, Jul 16, 2020.

  1. Jul 16, 2020
    ANTHONY DRANE

    ANTHONY DRANE New Member

    Friendly, WV
    Joined:
    Jun 13, 2020
    Messages:
    43
    In another post I had asked advice on an axle upgrade for my 67JC. The general consisis was a D30/D44 swap. Several people said not to junk the D30 rear as it might have a posi. Can I assum from this that if my rear has a posi, I can use it in my front D30 if it doesn't. If so, is it a big job? Is there any problem with a posi up front and an open in the rear? Thanks
     
  2. Jul 29, 2020
    jeepdaddy2000

    jeepdaddy2000 Active Member

    Eagle Point oregon
    Joined:
    Jun 24, 2004
    Messages:
    1,132
    The answer to your question is:
    Yes. As long as it fits within the gear ratio break, it can be swapped into the front axle.

    Installation is the same as a carrier swap.
    It will entail measuring the backlash and run a picture in the front prior to disassembly.
    Remove the old carrier
    Remove the ring gear.
    Install the ring gear onto the LS carrier.
    Install the "new" carrier.
    Measure the backlash and run a picture. Adjust the backlash to match the original measurement and picture.

    You can do a search for the information.
     
  3. Jul 29, 2020
    nickmil

    nickmil In mothballs.

    Happy Valley, OR
    Joined:
    Sep 23, 2002
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    12,529
    It’s a case, NOT a carrier. The part the axles go in and the ring gear bolts to is a CASE. The carrier is the the part the dive pinion and case go in. Sometimes called a pumpkin or other things. The carrier is a cast piece in Dana axle assemblies in which the axle tubes are pressed into and rosette welded.
     
  4. Jul 29, 2020
    nickmil

    nickmil In mothballs.

    Happy Valley, OR
    Joined:
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    I would check and see if you have a limited slip before going too far doe this path. In any case I wouldn’t junk your 30 rear. Someone else may need parts that you have for a restoration or just to keep theirs going.
    It also depends on what gear ratio you have have and what you plan to use. With a 30 the case break is 3.73-1 down to 5.38-1 and 3.54-1 up to around 2.73-1.
     
  5. Jul 31, 2020
    ANTHONY DRANE

    ANTHONY DRANE New Member

    Friendly, WV
    Joined:
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    Thanks. I couldn't see it being a problem but some of this is new groud for me. My 30 rear is open so it doesn't matter at this point.
     
  6. Aug 4, 2020
    jeepdaddy2000

    jeepdaddy2000 Active Member

    Eagle Point oregon
    Joined:
    Jun 24, 2004
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    Funny, I googled differential carrier and guess what pictures I got....
    I googled carrier bearings and guess what pictures I got......
    I googled carrier housing and guess what pictures I got.....

    Whether the name is totally accurate or not, it is a generally accepted term for the piece that carries the axle and side (pinion) gears. kinda like the way we call pressure differentiation vacuum. not accurate but commonly accepted.

    BUT I DO APPRECIATE ALL THE CAPS.
     
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  7. Aug 4, 2020
    nickmil

    nickmil In mothballs.

    Happy Valley, OR
    Joined:
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    12,529
    Yeah, we all know the internet is always accurate, always tells the truth, and is never wrong.
    Correct terminology helps to minimize confusion and conflicts, which we have enough in this world. Education helps with this. The caps on one simple word had its effect, it got the attention to the word I was going for. At least I didn’t use them in a whole sentence.
    One of my first employers, a very nice and wise older man told me in this world we have two major choices to make. Be part of the problem or part of the solution.
    I choose to attempt to be part of the solution of miseducation the best I can. Your choice is up to you.
     
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  8. Aug 9, 2020
    jeepdaddy2000

    jeepdaddy2000 Active Member

    Eagle Point oregon
    Joined:
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    Messages:
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    Education is important.
    A carrier is a fully loaded differential, consisting of the CASE, and whatever internal gears/LS/locker units installed in it.
    A CASE is the empty housing that contains those options.
    Since the OP was obviously not installing an empty CASE, the term carrier would be appropriate, regardless of the fact that the term is used universally for both the carrier and the case.

    Just trying to be a part of the solution.
     
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