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POWER LOCK PARTS INTER-CHANGE
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jeepsterjim View Drop Down
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    Posted: 02 June 2020 at 10:57pm
The '71 d-44 flanged off set rear diff  30 spline has a power lock unit it that I was going to use BUT I came across a possible problem that hopefully someone can solve for me.

The '71 diff has 3.73 gears----ring gear is stamped 41-11.
So the Power lock is a series 3?  since the diff has 3;73?
 if so, installing 5;38's won't work without useing a series 4 power lock?

Have, a D-44 2 piece 19 spline axle diff with 5'38 and a power lock.  4 series???

Is it possible to use the  power lock from the 2 piece alxe, 19 spline and simply change out a few parts from the 3 series power lock?

Would there be a clash with different bearings, ETC.

what a mess!    





Edited by jeepsterjim - 02 June 2020 at 11:04pm
Jim
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Originally posted by jeepsterjim jeepsterjim wrote:

The '71 d-44 flanged off set rear diff  30 spline has a power lock unit it that I was going to use BUT I came across a possible problem that hopefully someone can solve for me.

The '71 diff has 3.73 gears----ring gear is stamped 41-11.
So the Power lock is a series 3?  since the diff has 3;73?
 if so, installing 5;38's won't work without useing a series 4 power lock?

Have, a D-44 2 piece 19 spline axle diff with 5'38 and a power lock.  4 series???

Is it possible to use the  power lock from the 2 piece alxe, 19 spline and simply change out a few parts from the 3 series power lock?

Would there be a clash with different bearings, ETC.

what a mess!   



I swapped 30-spline D44 power-lok side gears into my 19-spline D44 4-series power-lok carrier. I believe most of the internal parts are 'standardized' in the D44 Power-lock.
42 MB that had a one night stand with a much younger 69 CJ5 and a 50s GM truck.



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Yes your D44 with 3.73 requires a series III differential case.
Yes you can interchange virtually all parts between your series III and series IV Powr Loks.
One exception.... Your 19 spline case uses different carrier bearing cones than the 30 spline case because the 19 spline unit has a smaller journal diameter due to axle shaft diameters.
Technically the 30 spline case is stronger at the journals due to increased journal diameter.
Again you can interchange all parts excepting the cone journal bearings.
Be careful that case halves are marked so they are re-assembled as they were separated and so do not rotate the case halves.




Edited by oldtime - 02 June 2020 at 11:38pm
Currently building my final F-134 powered 3B .
T98-A Rock Crawler using exclusive factory parts and Approved Special Equipment from the Willys Motors era (1953-1963)
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jeepsterjim View Drop Down
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Well that's good news for a change.

So Ken, what is need in the bearings, cones,  ETC., to make this work.  

have any USA/NOS made  cones, bearings you can send my way? 

THANK YOU guys for helping me out.  I'm finding stuff like this confusing any more Unhappy
Jim
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GROUP 21-03
52979-----------------D41 / D44 (10-19 spline) differential carrier cone--25577
52980-----------------D41 / D44 (all) differential carrier cup----------------25523
805311----------------D44 (30 spline) differential carrier cone-------------25590
Currently building my final F-134 powered 3B .
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Zero aftermarket parts

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Originally posted by oldtime oldtime wrote:

GROUP 21-03
52979-----------------D41 / D44 (10-19 spline) differential carrier cone--25577
52980-----------------D41 / D44 (all) differential carrier cup----------------25523
805311----------------D44 (30 spline) differential carrier cone-------------25590
     

THANKS Ken----you da man.  Now I just need to find NOS or USA bearings.
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I have plans for all my bearings but they are oft easy to find good old bearings on eBay much cheaper than new FLAPS.
Like these...



Edited by oldtime - 03 June 2020 at 3:31am
Currently building my final F-134 powered 3B .
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Originally posted by Metcalf Metcalf wrote:


I swapped 30-spline D44 power-lok side gears into my 19-spline D44 4-series power-lok carrier. I believe most of the internal parts are 'standardized' in the D44 Power-lock.

You’re running a Power-lok? I didn’t remember that.  Some things are starting to make sense. Wink
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Originally posted by smfulle smfulle wrote:

Originally posted by Metcalf Metcalf wrote:


I swapped 30-spline D44 power-lok side gears into my 19-spline D44 4-series power-lok carrier. I believe most of the internal parts are 'standardized' in the D44 Power-lock.

You’re running a Power-lok? I didn’t remember that.  Some things are starting to make sense. Wink

Only for about a year when I first built Rango. It was actually a pretty nice combo with the front automatic locker for most stuff.

I had to change to a real locker when I did Ultimate Adventure in 2014. I swapped out the rear power-lok for an air activated Ox Locker. It has been flawless for a long time now. I generally love the combo of the automatic front locker and the rear selectable. I do most everything in 3wd and only use the rear locker when needed for very short segments. I could honestly run it on a momentary switch just about.


42 MB that had a one night stand with a much younger 69 CJ5 and a 50s GM truck.



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Originally posted by oldtime oldtime wrote:

I have plans for all my bearings but they are oft easy to find good old bearings on eBay much cheaper than new FLAPS.
Like these...


Perfect----Once again a huge THANK YOU KEN!
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OK guys going to throw a monkey wrench in this post.

couple of guys have stated that since I have a D-44 with 3.73 gears with a series 3 power lock, I can keep it as is and simply install a thick 5.38 R&P and be done with it.  There's no need of needing a series 4 power lock.

SO once again I need your expert help. Is this a good idea?   pro's, con's   etc 

Thanks, Jim


Edited by jeepsterjim - 03 June 2020 at 7:40am
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Pro. ••• you get to use the 30 spline case with its stronger journals
Use older 10 spline yokes or updated 26 spline yokes

Con ••• adds some extra dead weight
Most all kits are aftermarket but you can get a DS thick gear set. Only fine spline pinions are available 


Edited by oldtime - 03 June 2020 at 1:10pm
Currently building my final F-134 powered 3B .
T98-A Rock Crawler using exclusive factory parts and Approved Special Equipment from the Willys Motors era (1953-1963)
Zero aftermarket parts

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Originally posted by jeepsterjim jeepsterjim wrote:

OK guys going to throw a monkey wrench in this post.

couple of guys have stated that since I have a D-44 with 3.73 gears with a series 3 power lock, I can keep it as is and simply install a thick 5.38 R&P and be done with it.  There's no need of needing a series 4 power lock.

SO once again I need your expert help. Is this a good idea?   pro's, con's   etc 

Thanks, Jim


Some of the thick cut ring and pinion sets have larger ring gear bolts. Just something to watch out for.

42 MB that had a one night stand with a much younger 69 CJ5 and a 50s GM truck.



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OK so using a thicker R&P set  is a "do able thing"

Need to find the proper fine spline  yoke.

Not having to rob parts from one unit to make another one work is also a plus. 

WOW what a educational post for me and maybe others.
THANK YOU GREATLY!!!!
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Originally posted by jeepsterjim jeepsterjim wrote:

OK so using a thicker R&P set  is a "do able thing"

Need to find the proper fine spline  yoke.

Not having to rob parts from one unit to make another one work is also a plus. 

WOW what a educational post for me and maybe others.
THANK YOU GREATLY!!!!
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   Jim !

   I haven't stopped by because of the Covid-19 shut-down, so I haven't been traveling to the Sacramento area since February.
   My guess is you are making good-headway on your '46.

   During this shut-down I have been replacing a bathroom floor in a Toy Hauler trailer that was calling to me.   hahahaha

   Did you find a 5:38 gear-set for your Model 30 front axle assembly ?

     Len
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Originally posted by Greaser007 Greaser007 wrote:

   Jim !

   I haven't stopped by because of the Covid-19 shut-down, so I haven't been traveling to the Sacramento area since February.
   My guess is you are making good-headway on your '46.

   During this shut-down I have been replacing a bathroom floor in a Toy Hauler trailer that was calling to me.   hahahaha

   Did you find a 5:38 gear-set for your Model 30 front axle assembly ?

     Len

Hey Len
Good to hear your alive!   I have not bought a 5.38 R&P and master rebuild kit yet for the D-30. I did find a 4 series Power lock for it though.  Been cleaning up the frame and have to replace 2 shackle mounts which I found---NOS.   Give me a shout, Jim
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You can also just use a ring gear spacer, these are readily available for Dana 44 axles.  If you have not purchased the gears yet then the thick ring gear makes for one less part to worry about coming loose.
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