I remember reading though that the factory transmissions can only hold around 300hp before they grenade. Maybe that's some of the reason why they didn't put a stronger motor in there.
If it makes you feel better, the 4l30e tranny we have is the same that is used in the Chevy Aveo. High quality...
I predict future happiness for Americans if they can prevent the government from wasting the labors of the people under the pretense of taking care of them.
Thomas Jefferson