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Help With Powr-lok Identification

Discussion in 'Early CJ5 and CJ6 Tech' started by dafeeesshh, Jan 22, 2017.

  1. Jan 22, 2017
    dafeeesshh

    dafeeesshh Member

    Colorado
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    Picked up a powr-lok limited slip off a craigslist deal and I assumed it was 19 spline for a later 19 splined dana 44 but after getting home I counted the splines and came up with 20. From a little bit of research I found that 20 spline means that it is for a Dana 53 out of a Jeep truck. It seems like it is in good rebuildable condition but I have no use for it as I only have Dana 44's laying around.

    Is it worth trying to find new side gears for this carrier of just sell it and try to find a 19 splined carrier?

    Pictures for those who like that.
    [​IMG]
    [​IMG]
     
  2. Jan 22, 2017
    jpflat2a

    jpflat2a what's that noise?

    Riverside CA
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    Post a picture of the numbers that should be stamped into the side of the case.
     
  3. Jan 22, 2017
    jzeber

    jzeber Well-Known Member 2019 Sponsor

    Morgan Hill, Ca
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    Does the "44 STD" on it mean anything?
     
    Last edited: Jan 22, 2017
  4. Jan 22, 2017
    jzeber

    jzeber Well-Known Member 2019 Sponsor

    Morgan Hill, Ca
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  5. Jan 22, 2017
    jpflat2a

    jpflat2a what's that noise?

    Riverside CA
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    Just looking for the ID numbers to confirm.
     
  6. Jan 22, 2017
    Keys5a

    Keys5a Sponsor

    Florida Keys
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    Post up a photo of the side of the case, and there should be 5 stamped numbers, usually ending with "x". The end shot you posted doesn't look familiar to me as a Power Lok, but I could be wrong.
    -Donny
     
  7. Jan 22, 2017
    jpflat2a

    jpflat2a what's that noise?

    Riverside CA
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    Usually 3.73 ratio.
     
  8. Jan 23, 2017
    jzeber

    jzeber Well-Known Member 2019 Sponsor

    Morgan Hill, Ca
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    Thanks Jim
     
  9. Jan 23, 2017
    dafeeesshh

    dafeeesshh Member

    Colorado
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    Apr 21, 2010
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    Here are some photos showing the rest of the stampings.

    [​IMG]
    [​IMG]
     
  10. Jan 23, 2017
    oldtime

    oldtime oldtime

    St. Charles,...
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    A model 53 differential will never fit into a D44 axle.


    The "STD" typically indicates it to be a series IV unit (for use with 3.73 and lower gears).
     
    Last edited: Jan 24, 2017
  11. Jan 23, 2017
    timgr

    timgr Eppur si muove. 2020 Sponsor 2019 Sponsor

    Medford Mass USA
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    Surprising, because the 53 was used in Jeep trucks prior to, say, the late 60s? If I guessed, I would expect a truck from that era with a 53 to have 4.88s or 4.09s ... at some point it was replaced by the 60-2 for the middle-weight trucks, and even by 1972 a 60-2 would be 4.09 standard and 4.88 optional. My 1982 J20 is the middle weight rating - though 8 lug - and it's 3.73s, despite Jeep's overall trend to numerically lower ratios.

    3.92 or lower for a 1965-ish J-truck with a 53 would surprise me.
     
  12. Jan 23, 2017
    oldtime

    oldtime oldtime

    St. Charles,...
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    I'm talking lower / or slower gearing which is in fact numberically higher.
    Lots of confusion depending on whether one looks at only the numbers or the results of those numbers.

    3.73 through 5.89 is the case split for a Dana 53 series IV unit.
    3.54 and higher (numberically lower) for Dana 53 series III unit.
     
    Last edited: Jan 24, 2017
  13. Jan 24, 2017
    dafeeesshh

    dafeeesshh Member

    Colorado
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    Thanks for all the info. Looks like I have no use for this power lock do these have any value to them? I would like to sell it so I can grab a power lock for my dana 44.
     
  14. Jan 24, 2017
    wheelie

    wheelie beeg dummy 2019 Sponsor

    York, PA
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    Maybe kinda sorta. I had one that I couldn't sell. I ended up selling or trading it to Herm. I forget which. List it here in the F/S section. Maybe someone will want it. If not, call Herm and see if he will work a trade/deal with you.
     
  15. Jan 24, 2017
    timgr

    timgr Eppur si muove. 2020 Sponsor 2019 Sponsor

    Medford Mass USA
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    Try the "for sale" sections at ifsja.org and fsjnetwork.com ... if you are sure it's for a 53.
     
  16. Jan 24, 2017
    oddfirejeeper

    oddfirejeeper Active Member

    Hamilton, MI
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    the op never did post a picture of the stamping numbers on the "side" of the case and not the #'s on the ends. those numbers will tell what it is
     
  17. Jan 24, 2017
    oldtime

    oldtime oldtime

    St. Charles,...
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    Yeah I'm beginning to wonder just what it is.

    dafeeesshh you have a side view with the case number on it ?
    Any date on the ring gear ?

    Dana 44 ring gear ID is 5-1/2" and ring O.D. is 8-1/2".
    So what size is the ring gear on this thing ?

    Maybe I'll buy it and modify to 30 spline Dana 44 if everything else checks out.
     
    Last edited: Jan 24, 2017
  18. Jan 24, 2017
    jpflat2a

    jpflat2a what's that noise?

    Riverside CA
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    Maybe a Trac Lok ?

    Maybe not. Can't find a listing for the 53.
     
  19. Jan 24, 2017
    oldtime

    oldtime oldtime

    St. Charles,...
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    The numbers on his casting (44 STD and C30761) are the same as a 1960's Dana 44 Powr Lok having 19 splines.
    I'm thinking it has a special shaped 2 piece ring gear (see the pic) on a D44 Powr Lok case.
    I'm guessing the side gears can be changed out.

    Normally a Dana 53 has 12 ring gear bolts but this (special 53 Powr Lok gear ?) has 10 bolts like a Dana 44 ?
     
    Last edited: Jan 24, 2017
  20. Jan 24, 2017
    Rralphs

    Rralphs Old Member

    Nederland, Co
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    If it has 20 splines its from a dana 45 out of 1958 or 1959 chevy half ton. Have 2 of those in my garage.
    The dana 45 is a hybrid with carrier parts from the model 44 and pinion sized from a model 53.
    Looks like it still has the ring gear, does it say the tooth counts?
    If it is 3.73 or lower and you have the pinion I'll trade you a 4 series power lok that has 19 splines.
    Dana 45's power lok's that are for 3.73 or lower are rarer then hens teeth. Only an option with a Hydramatic.
    Most were 3.92's (what I have).
     

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