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Dana 44 carrier/case bearings

Discussion in 'Early CJ5 and CJ6 Tech' started by Rondog, Nov 7, 2009.

  1. Nov 7, 2009
    Rondog

    Rondog just hangin' out

    Parker, CO
    Joined:
    Aug 25, 2005
    Messages:
    2,918
    I'm having a local guy setup the diff in my 1956 D44 rear end.

    He discovered that one of the bearings just fell off the carrier/case. Bearing surface was worn undersized. mehh

    I calls up Randy's R&P, and orders me a new one.

    Wrench tells me the new one has larger bearing surfaces, the new bearings I have won't fit. :?

    So I go over and mic the parts, my original part mic'd at 1.690.

    The new bearing mic'd at 1.6885. This is a #25577 bearing. .0015 interference fit, just right.

    The new carrier/case from Randy's mic'd at 1.7985! :mad: The box it came in says it uses a 25590 bearing. .1085 difference!

    So, my question is, is it possible the new carrier/case is for a later model D44? A D44 isn't just a D44? Everything else about it looks the same. Randy's was closed for the weekend so I couldn't call them. Grrrrr.
     
    Last edited: Nov 7, 2009
    Rondog, Nov 7, 2009
    #1
  2. Nov 7, 2009
    Patrick

    Patrick Super Moderator Staff Member

    Los Alamos, NM
    Joined:
    Sep 22, 2002
    Messages:
    8,360
    They upped the carrier (case) bearing journal size in 70 or so, and all the new aftermarket units use the larger bearings AFAIK.
     
    Patrick, Nov 7, 2009
    #2
  3. Nov 8, 2009
    Warloch

    Warloch Did you say Flattie??? Staff Member

    Falcon, CO
    Joined:
    Mar 4, 2003
    Messages:
    5,469
    You have to be specific on the parts that get ordered - one of the things I found out when I had the OX lockers installed. I got lucky and the Diff Shop down here knew what he was doing and got the right parts the first time.
     
    Warloch, Nov 8, 2009
    #3
  4. Nov 8, 2009
    jpflat2a

    jpflat2a what's that noise?

    Hermosa, SD
    Joined:
    Jul 30, 2003
    Messages:
    8,521
    it's the tapered vs flanged axle story
    just tell them what axles you have
    different bearings for the different axles
     
    jpflat2a, Nov 8, 2009
    #4
  5. Nov 8, 2009
    Rondog

    Rondog just hangin' out

    Parker, CO
    Joined:
    Aug 25, 2005
    Messages:
    2,918
    I DID tell the fool what it was. I was VERY specific that this was for a 1956 WILLYS CJ5, offset diff., tapered axles, etc., and not a later one. I'm not getting a very good feeling about this, I'm thinking I'd be better off taking the old one to a machine shop and just having that bearing surface knurled. Folks have been doing that for many, many years. I should have just done that to begin with.

    I'm hoping that if Randy's can't get me the correct one, that they'll at least take this one back for a refund. Nothing's been done to it except for putting a micrometer on the bearing surface.
     
    Rondog, Nov 8, 2009
    #5
  6. Nov 9, 2009
    nickmil

    nickmil In mothballs.

    Happy Valley, OR
    Joined:
    Sep 23, 2002
    Messages:
    12,529
    On a Dana 44 10 and 19 spline diff cases used one size bearing and 27 and 30 splined side gear diff cases used a different bearing. Just tell them your spline count.
    Just looked at Randy's site and they don't have a listing for anything less than 30 spline. Probably why they sent the wrong parts.
    Quite a while ago I couldn't find a new diff case for a 10/19 spline axle. Used was all that was available. Might try and find a good used unit. Probably be cheaper too. Let them know what gear ratio you have, you'll need that info as well.
     
    nickmil, Nov 9, 2009
    #6
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