2004 BMW M3 SMG Gearbox. Part-1

We have here a SMG type Transmission. It is somewhat complicated to work on, but we had success. This video is just part 1. Stay tunned for the rest. This car will not do anything when we got it in for repair, The hydraulic control unit was damadged so we replaced it, worked good for some time, now we have some pressure loss in the system...Could it be the hydraulic Unit? or the Slave cylinder? Post your comment!