differential

[58oldsman]

Hello ..I recently purchased a posi defferential and when I received it the Packageing stated make sure if your rear end housing is a 2 or 3 stage. Can anyone out there explain what the term 1,2 or 3 stage means when referring to rear end housings going in circles trying to get this information..Thanks

[maxwedge]

I think at this point, year make and model may help!