Diff Housing Numbers?

[hux340]

Hi All,
Would anybody be able to tell me what the no's on the diff housing of my 71 Dodge Demon 340 mean?
The numbers read as follows -
172
4 A (with a circle around it)
2 10826
2581489
AAPW

Cheers,
Glenn.

 

[jdsduster]

2581489 is a 489 center section.not sure on the others

 

[hux340]

Thanks mate, could you get different center section or was that the only one?

 

[cosgig]

Thanks mate, could you get different center section or was that the only one?

Your car could've come with a 741 case as well!!

 

[hux340]

What's the difference between the two?

 

[MrJLR]

What's the difference between the two?

Pinion shaft diameter
The 489 is the biggest and the strongest

Jeff

 

[Mr Gorsky]

Everything You Ever Wanted To Know About The 8 3/4 Axle:

 

[halifaxhops]

Lots of info here also.
Axle Identification, late '50s through early '80s