My T-56 was leaking at the rear seal and I just got a rear seal for it. I know I will need to add fluid. I was told by the previous owner it has Royal Purple in it now but I don't know what type other than the name. My question is is it ok to mix if I don't get the same as what's already in there? Also how how do I check the levels and add the new fluid. Thanks!

 

Drain it all the way and put all new fluid in then you know ur good. When the fluid starts coming out of the fill hole she full.