Does anybody know what wight oil and how many quarts I need for my rear diff. It is a 05 ranger edge and it has a open diff with the 7.5" ring gear and a 28 spline axil. Also do I want to run synthetic or dyno oil. I am installing a powertrax lock right 1830 and doing the rear disk brake mod. Also do you think because I am adding the locker I should use oil that is for a limited slip diff? Sorry for all the questions but I am at work and I no loger have a owners manual as it was stolen.

 

Are you sure its not a 8.8?

 

Yep, 7.5"

 

Ok...?

 

I guess that means that you do not know.