1) 8.8, rear solid axle
2) t3650
3) 3.27s
4) 260 crank hp, around 235 rwhp
5) between 14.1-14.4 if you can drive
6) to turn off the traction control, lets you burn out when its off
7) up to you and how much you want to spend, i prefer synthetic.
as to problems, depends how its maintained and driven.