Here's a link to AMG... It says that the Transmission, suspension and brakes have been "refined" for the added performance of the AMG engine. I couldn't find anything to tell me exactly what the they did to "refine" it. It could be as little as changing the line pressures and shift points... Your guess is as good as mine. :?. My guess is the SRT will have the AMG tranny.

http://www.mbusa.com/amg/model-inc.j...delsection=SLK