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Old Apr 9, 2012 | 03:37 AM
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jkuhane
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gearing

So I just swapped out my rear diff that had 3.25 to 4.88 with a Detroit locker. The owner s before me tried to run 38" tires with 3.25 gears!! But I'm ready to do the front which is a Dana 44 high pinion. Does anyone know the pinion spline count and axle spline count? My truck is a 1977 Ford f150 4x4. Worst case scenario would be to pull the axle and check before I order, but could anyone save me some time? Thanks
 
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Old Apr 9, 2012 | 09:00 AM
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I would probably be just as easy to pull a front axle and count them now since you can't drive the truck around with such radically different gears in it.
Then you will know for sure what you are ordering.
 
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Old Apr 9, 2012 | 10:10 AM
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Originally Posted by Poison Oil Racing
I would probably be just as easy to pull a front axle and count them now since you can't drive the truck around with such radically different gears in it.
Then you will know for sure what you are ordering.
Sure he can drive it all he wants just be safe and pull the front driveshaft, not really sure of t-case and he may have to pull the DS with a full time t-case(np203).

jkuhane, Get the B.O.M.# off the front of the passenger side axle tube, it will look like this ( 2 24 6 A4 603781 8 ) then search it on the web, post it here for more help also Call Randys ring and pinion at 1-866-631-0196 if you still need help. Something for toilet time, Dana 44 Solid Front Axle: Part 1 Reverse Spiral Housing.
 
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Old Apr 9, 2012 | 01:33 PM
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Thanks for the reply guys. The number on the axle read 6 20 7 b5 and 610024 1r
Ill try and research it on the web
 
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Old Apr 9, 2012 | 07:49 PM
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HIO Silver
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Originally Posted by jkuhane
Thanks for the reply guys. The number on the axle read 6 20 7 b5 and 610024 1r
Ill try and research it on the web
Here you go.. this applications reference catalog is buried deep in the Spicer/Dana site:
http://www2.dana.com/pdf/X510-8DSD.pdf

on this page: Dana Holding Corporation The Expert Librarian - Information for driveshafts, u-joints, axles, heavy axles, light axles, Drivelines

BOOKMARK FOR FUTURE REFERENCE!!!!

Here is the cover:


EDIT: There is a separate reference catalog for 79 and newer Fords.
 

Last edited by HIO Silver; Apr 9, 2012 at 09:00 PM. Reason: Added the note...
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