Ok...i have 4.10's i am putting in this weekend...and if your going to post dont put them in..dont post ...itll be a waste of time..i wont listen to u......but ya...i am mechanically inclined i know what im doing for the most part...just the part on how do u know what shims to yous and how much backlash ..pretty much all the spec **** i dont know seeing as i didnt get any specs with the gears...also anyone know anything part of the site or anything where it gives me a step by step procedure on how to change gears and **** so i have something to follow...thanks....anything apprecaited..