d44 and 9" gear ratio

[MaGiKaLsHoTs]

ok so my 9" doesnt have a tag but seeing as the gears have numbers i decided to take a look... come to find out it has been sitting for so long that is just happens to be rusted RIGHT over the ratio numbers... UGH

now my d44 came with a tag the tag reads:

3 54 D6TA AJD
603780 3

i think its safe to assume it has 3.54 gears but im not sure, and the ring gear does not have any numbers on it


anyone know how i could figure out the gear ratio without the numbers?

i just want to make sure they match before i through them under the truck

thanks

 

[joshnlsn]

divide the number of teeth on the ring gear by the number of teeth on the pinion,that number will be the ratio

 

[4x4junkie]

If the Dana is a 3.54, there is probably a number such as "39-11" stamped along the edge of the ring. That's the ring & pinion tooth count for 3.54 gears.

The matching 9 likely has 3.50 gears.

 

[MaGiKaLsHoTs]

will that mess up the transfer case if the gears are that small amount of difference?

 

[4x4junkie]

No, up to about .05 difference is fine (differences in amount of tire wear front-to-rear can often equate to more than that). After all, it did come from Ford that way.

 

[MaGiKaLsHoTs]

oh k.. thanks man