Convert open to posi?

[fastlif]

What do I need to convert my open diff to posi? Are oem parts available? Would it be better to just buy an eaton or brand xxx diff? If so what spline axles are stock etc? Any opinion on which direction to take appreciated. This is going on an all original 47k mile car. I do plan on a few bolt on upgrades so oem is 100% required but an option.

 

[V6RACER]

28 spline is stock. Eaton seems to work well.

Jackson Powertrain can set it up for you.

 

[fastlif]

I may just let them do it. That way if it whines I can take it back. I haven't any luck with any gear changes in any gm cars.

 

[V8Killer]

Yup, go with an Eaton you won't regret it.

 

[Pronto]

I love my Eaton Posi. No issues and it's tight. Got it from Gears are Us. They had a nice shim kit as well.