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is it a dana 44?

Discussion in 'Early CJ5 and CJ6 Tech' started by friendxconnect, Mar 7, 2014.

  1. Mar 7, 2014
    friendxconnect

    friendxconnect Member

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    Oct 24, 2005
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    Hey from France,
    I was to change some parts of my rear axle.
    my jeep is a 67' cj5 V6 225 T14
    is my rear axle a dana 44?
    [​IMG]
     
  2. Mar 7, 2014
    jpflat2a

    jpflat2a what's that noise?

    Hermosa, SD
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    Jul 30, 2003
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    Nope.
    Looks like Dana 41 to me.
     
  3. Mar 7, 2014
    oldtime

    oldtime oldtime

    St. Charles,...
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    X 2.
    If it's a D-41 its circa 1946-1950 and was only available with 5.38 final drive ratio.
     
    Last edited: Mar 7, 2014
  4. Mar 7, 2014
    Posimoto

    Posimoto Hopeless JEEP Addict

    Minden, Nevada
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    I've never seen a D41 and a quick look at this one would lead my to say D44. However, looking more closely I see that the ring gear is very thin and the recess for the ring gear in the case is larger than a D44. Is that what tipped you guys to this being a D41? Just curious.

    Also, friendxconnect, the build date may be stamped on the edge of the ring gear although I sure don't see much room for that..
     
  5. Mar 7, 2014
    oldtime

    oldtime oldtime

    St. Charles,...
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    The main give away is the round differential cover.

    Yes the Dana 41 has a thin ring and that's partly why the D44 was developed.
    Because it's already thin as it possibly can be the D41 physically can't handle a higher FDR / thinner ring gear.
    At least not without a newly designed differential unit.

    At that time (1950)Willys needed higher FDR for the newly developed F-134 that was put into SW's.
    The PU's also needed higher FDR (4.88 ) but they used the HD Timken axles.
    The 1950 SW's needed a lighter 1/2 ton axle with a FDR higher than 5.38.

    The D41 ring and pinion is larger and stronger than the D44 gear sets.
    But the axle shaft diameters and splines remained unchanged until 1956.
     
    Last edited: Mar 7, 2014
  6. Mar 7, 2014
    Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member

    Tantallon, Nova...
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  7. Mar 8, 2014
    nickmil

    nickmil In mothballs.

    Happy Valley, OR
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    X3 on a 41. The ring and pinion may be a larger diameter but the lack of thickness of the ring gear leads to more deflection of the ring gear under load. This leads to premature wear and makes them actually weaker than a thicker, slightly smaller diameter ring gear.


    Sent from my iPhone
     
  8. Mar 8, 2014
    Wenaha

    Wenaha Member

    West Coast
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    I installed a custom cut set of Warn FF rear axles in my Dana 41 rear about 15 years ago. I don't abuse my Jeep, but I don't worry about busting an axle, either. Here is what Warn says (said) about these axles:

    "...This gives the Warn axles a yield strength of 230,000 psi. Sound a little better than a stock axle’s 90,000 psi or the average aftermarket axle’s 125,000 psi? You bet it does."
     
  9. Mar 8, 2014
    uncamonkey

    uncamonkey Member

    Greeley CO
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    I had to look at the pictures of the rear differental in my brothers Jeep.
    4X on it being a D41
     
  10. Mar 8, 2014
    friendxconnect

    friendxconnect Member

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    I have these references written on the body:
    [​IMG]
     
  11. Mar 8, 2014
    friendxconnect

    friendxconnect Member

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    I had a look on the web it seem to be a hard job to find a ring an pinion set!
     
  12. Mar 8, 2014
    friendxconnect

    friendxconnect Member

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    I have fond this axle in France, do your think it is compatible with mine?
    [​IMG]

    [​IMG]
     
  13. Mar 8, 2014
    oldtime

    oldtime oldtime

    St. Charles,...
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    Yes the D41 is a bit of a dinosaur.


    Interesting comment !
    But I seriously doubt that the L or F-134 could ever supply enough torque to produce any ring gear deflection.

    So how could one possiblty measure any ring deflection installed into a working assembly ?

    Let's imajine a torque wrench being applied to the yoke of an opened case.
    A dial indicator is mounted to measure the ring deflection.
    I would expect that noted deflection would more likely be coming from the force upon carrier bearings.
    Or perhaps the detected distortion might even be coming from distortion of the carrier.

    To me, your thinking mainly implies that larger ring diameter would produce greater bearing deflection than a smaller ring diameter.
    So yes I would tend to agree that slightly smaller ring diameter could produce better overall results with less distortion of the ring / pinion alignment.

    Regardless it's apparently relative to the overall design in Dana's effort to minimize design weaknesses.

    In the end I seriously doubt that the ring itself is ever deflected to the side.
    After all the ring thickness is always backed up via the differential.
    However it is also possible that under very high torque load that the tooth pitch / rake is being distorted if using a relatively thin ring gear.
    In other words I imajine that the ring teeth could be flexing if the band is too narrow.
     
  14. Mar 8, 2014
    friendxconnect

    friendxconnect Member

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    My jeep is a V6 225 not F-134 is it normal to have this axle installed? instead of a dana 44?
     
  15. Mar 8, 2014
    Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member

    Tantallon, Nova...
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    No, someone has replaced the original Dana 44 with that one.

    H.
     
  16. Mar 16, 2014
    friendxconnect

    friendxconnect Member

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    I have fond this axle dana41 8/43 but the it is bigger than mine
    1m60 and mine is 1m30
    Is it a wagoneer axle?
     
  17. Mar 16, 2014
    uncamonkey

    uncamonkey Member

    Greeley CO
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    If the tag is correct it's a 5.38 and it does look like a model 41, you should be looking for a d44, it is what came in your Jeep from the factory. As far as the width, might be from an old station wagon or pickup, what size brakes are on it? They're worth saving if they are the 11' size.
     
  18. Mar 16, 2014
    jeepcj

    jeepcj Member

    cincy, Ohio
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    If the axles is wider than yours, it is probably from a willys pickup, same axle just wider. Will still work but I think you would have to move the spring perches. Oh, by the way, all 41,s came with 5.38 ring and pinions. I couldn't find a replacement 44 for my 69cj and ended up getting the 41 rear and 25 front for mine. Still need to install them though, I hated getting them because my current axles have powerlocks and the 41 and 25 are open diffs, and they wont swap over. :(
     
  19. Mar 16, 2014
    friendxconnect

    friendxconnect Member

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    I cannot find a dana 44
    I m in france
    With the 2 axles i hope to make one
    The brakes of the bigger have cables for the parking brake
     
  20. Mar 16, 2014
    Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member

    Tantallon, Nova...
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    What is the problem with your existing axle?

    If I were you i would keep searching for a Dana 44.

    H.
     
    Last edited: Mar 16, 2014
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