All, need some help id'ing the diff in my truck. First, there is no diff tag. I know it originally came with a ford 10.25. On one of the pins is the number 67566. On the body of the diff is a 12 over 12, a 35 over 35 and 69307. On the ring gear mount is 69309, circled H, and a "D". On the ring gear is 410 E5TW DA 1C41 9KC.
I think it is a Detroit Locker, looking for confirmation and possibly model number to rebuild it.
Below is a pic I took of it. Thank you in advance.

 

probably 4.10 gears count the teeth on the ring gear. and if you can, count the teeth on the pinion.
divide ring gear by pinion and that will give you the gear ratio.

 

Figured it was a 4.10, but the question still stands, what kind of diff is it?

 

some type of locker that is for sure. the exact manufacturer though is past me.