I own a 2005 G6 and I need to figure out what the gear ratio is I'm guessing. I'm wanting to upgrade the transmission on it. I found that it is a 4t45e. I dunno what that means but yeah. Still need to figure out the gear ratio's.... :/ I'm totally lost and the people I'm talking with on the phone cannot help me until I give them those numbers. Anyone know where they are? Better yet I'd also like to know places people would trust to order tranny parts from that won't send me crap parts. Any help would be appreciated.