ok since your 4x4 you should already have the 8.8 rear diff. you probably hasve an open diff. do you want to replace your diff? the 8.8 is really strong and in my opinion has no major weeknesses. and for lockers i dont have one in my 03, but i put one in my 92. the
"aburn pro locker" is what i have. i think
ill have to find some paperwork on it.