I am going to order the detroit truetrac and 4.10 gears from summit. What else do i buy to replace everything else i need? Under recommended parts for the posi it says an install kit and 2 seperate bearings for some other rearend? Im kind of confused of what all i need to buy to install the gears and posi.

http://store.summitracing.com/partde...0+4294901322+0

 

You nees RAT-366K and you'll need some fluid. (assuming by your user name that you have a 2000 Z71)
If a shop is going to install the parts for you, then they will have the fluid. Just a thought. If you buy the parts and install them yourself you save a few bucks but, get no warranty. I bought my own parts and had a shop do the install and still got no warranty because I brought the parts in. So..if youre gonna have a shop do the install, price the total (all parts and labor) through them and see if its worth losing the warranty.

 

it says 7.5 in. so i think it's for the front diff. of 4wd's. Ignore it. you do need that master install kit though. If you have never installed gears before i would reccomend taking it to a shop because they have the lash meters and know the correct torque, can install your crush sleeve correctly, everything.

 

well it says on the page all the lockers are on 30 spline 8.5 gm 10 bolt, I dont know il just call detroit i guess. Me and 2 other guys will do the install. Im a machinist so i have all the tools.