6.5 or 7.5 posi

[kurodakustoms]

I have the posi unit removed from the rear end. How do I measure it to determine what it is....thanks

[spencerforhire]

The 6.5" and 7.5 is the diameter of the ring gear. If it's a later 3 link type, it's easy to tell from the outside of the housing. 6.5 has 4 short bolts holding the torque arm on and a 7.5 has 2 long bolts.

[kurodakustoms]

Thanks for the info. It makes sense. I wondered if it was that simple.