Front Diff Identification

[pike_mazter]

I have a low mileage front diff that is supposedly its from a 99 Yukon with 3.73. Is there a way to tell what gearing it is without tearing it apart? There are no clear markings that I can find.

 

[Swims350]

turn the DS yoke and count the turns of the axle flange, that can get you close, but best bet is tearings into it to count teeth.

There should be a code stamped in the housing, I would think, like gu6, but not sure on front axles, then there is always the chance somebody could have swapped gears.