I have a brand new, still in box, set of Genuine GM 3-Series 3.73 Gears with Installation Kit for sale for 250+shipping. I bought these gears and install kit from Stranoperformance for about 350 bucks, who purchased them from Liberty Gear and Axle, who purchased them directly from GM. These are GM gears, not the cheap ones out there that break all the time. If you'd like pictures PM me your email. Any questions feel free to ask!