i'm wanting to install a rear lsd for my 2000 2wd v6 X. i did the search and all but is still confused about needing a completely new rear diff housing. is that the same thing as the third member? my dad is a mechanic so the installation is not an issue, but is the having all the parts i need to do the installation is. so is getting a rear lsd unit from another x sufficient or am i going to have to change out my entire rear diff?