ok i spent all day googling and reading and i think i understand it. but the reason why i am asking is because my axles which are 33 spline i am not having much luck finding a posi for it all i am finding are lockers like this one
http://www.summitracing.com/parts/DTL-914A575/
so i ask what is how do you like it for those who have lockers? is it annoying? is it loud? nothing i can find out there is a posi for my 33 spline axles