Bronco axle identification matching up

[mdshore]

I have numbers off of a d44 front and rear axle not sure if these are ok to put on same vehicle ratio match? Can anyone tel me thanks !
Front axle - 7 25 5 c 4 603421
RearEM-F1 3L50 6LE 695

 

[okie4570]

If they're "unknown" axles, it would still be safe to pull the cover/3rd member and count the teeth, despite what the tag reads. There are some axle guru's here that will tell you what the tags read. The rear is limited slip 3.50 built in 1976, not sure on the front.

 

[SteveL]

Or spin em and count turns.how many driveshaft rotations per axle rotation.

 

[jckkys]

There won't be an exact match. Dana only had a 3.54 to work with the 3.50 9". This was the most common OE combination in EBs. It works OK.

 

[DirtDonk]

And if that "603421" is a representation of the BOM found on the axle the only place I could find that number was for a '76 Bronco (well, it said "Bronco II" in the text, but pretty sure that can't have happened) and without the final digit that BOM could have been supplied in either 3.54 or 4.09 ratios.
The additional numbers in that string in the first post (7 25 5 C and 4) are probably some other coding, but if for some reason one of them is the final digit, of them only the 5 and 7 are listed and both are 4.09's

And as said, that was more than 40 years ago and any of them could have been changed. So it's time to do a quick test if you really want to know.

Paul