i asked this b4 but it never picked up...did anyone upgrade thier gears when they put on 18s or 20's? also has anyone put posi in their LS rear end and hows it workin out?

I havent upgraded my tire size - still on 17" wheels.

I run 18's and not changed my gears, come to think of it I don't think I have ever seen different gears available for the LS.