Hi all! I need some help. I have a 2000 Pontiac Grand Prix, 3.8L non super charged, and I have an issue I need help with. I hit a curb on the passenger side, and now i have to replace a differential extension cover? can anyone explain this to me a little more what it will take to do so? I have worked on the cv joint on this side of the car before, but not the differential. how do i tell if it is still good? and what is needed to replace the differential extension cover? thanks!