I'd love to see the Torque Converter selection. It surely won't be a high stall, but maybe they've at least been able to approve efficiency and decrease its weight. That 50lb 4th gen converter was a dog.
http://www.media.gm.com/us/powertrai...8_6L80_MYC.doc
"There are two torque converter sizes, 258mm and 300mm. The 258mm applications use a twin-plate torque converter lockup clutch, while the 300mm applications use a single-plate torque converter lock-up clutch. Both types of clutches make use of GM’s proprietary electronic controlled capacity clutch (ECCC) technology, which uses a small, regulated amount of slip to dampen out engine pulses. This creates a smoother running drivetrain, especially during shift events."