found a from a 2011 Lucerne with 2.86 gear ratio trans with only 3750 miles on it for $650. gonna throw in my 3:05 gear ratio from my impala or get this.
http://www.ebay.com/itm/4T65E-34T-DIFFERENTIAL-SET-ASSEMBLY-FINAL-DRIVE-RING-GEAR-SUN-GEAR-TRANSMISSION-/251320212140?pt=Motors_Car_Truck_Parts_Accessories &hash=item3a83da1aac&vxp=mtr

and a transgo shift kit, also wondering if i should buy a new pcs from triple edge performance? figuring since the trans has barely any miles it should be fine.