limited slip

[xposm]

I have a 2002 sport 4x4 with a 3.73 ratio open rear axle. I want to install a limited slip, I am thinking about an Eaton Posi. But i just want to know all the specifications of the stock rear axle like the spline, bolt and so on. And do i ahve to buy anything else to make the limited slip fit in my axle or just the component?
Thanks for your help.

 

[Alec]

31 spline, I believe 7/8 crosspin.

The Eaton Posi is a very good unit.

Think about regearing at the same time if you're ever gonna get bigger tires. This will save on labor costs.

 

[xposm]

thanks Alec for yur help is there anything else that i need 2 know?