Quote:
Originally Posted by DeadheadNM
I believe the fitting for a posi axle is an “outie” like shown whereas the non-posi axles use an “innie” and these styles are not interchangeable as the threads differ. Here are example posi fittings and these have the shoulder to retain the posi tag.
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Pete,
My rig has the original posi differential with original red tag and an innie square drive plug. This is a pic of the side of my differential before I had it rebuilt and a photo of my SPID. Not sure if mine is an oddity or there are others but I thought I would share.