From the first day i got my G27 it would disconnect randomly than i went to Logitech and they gave me another one it still had the same problem Some times it would stay 2 to 3 Hours not disconnecting but sometimes every 15 Minutes or So I tried Everything But There Is nothing that worked

You could try to change the power setting of your USB ports.
Select that it isn't allowed to go into power saving and see if that's a solution to your problem.

You could also try to see if there is a newer driver for you G27 or for your USB-ports / Motherboard.

Alrady did the usbs Power Setting Nothing Changed

And i tried to find New Drives and i Failed

What happens when the wheel "disconnects"? Does it die completely and recalibrate itself when it comes back online or does it just stop responding in the game?

It Dies Completely and recalibrates itself Really Annoying