Tonight I was driving the Z28 and when I floored it, it felt as if very little power was getting put to the ground. Also when I did floor you can hear and feel something being jerked around. As I was at a stop light the car seemed to idle fine, but when the light changed and I stepped on the gas, its threw an SES light.

ITs a 4L60E transmission
Lid
Cutout
Bunch of suspension stuff but nothing really major done to the car.

Anyone have any ideas?