Hi guys, I'm new here and I really need your help. Here's the story, I bought a 2009 e60 550, only 104k miles. I bought the car not running, mechatronics in the trunk. The hydraulic system was in terrible condition, so I bought another, used (a065, 6hp28 transmission) I put it all together, the tcm was the old one, put it together as it should be, filled with enough oil, but the problem is that it doesn't go, when switching to R or D, the car seems to get a load, and one of the following happens: - it switches back to park, or stays in its position but doesn't go anywhere - or it can even stall from the load when the mode is turned on. All seals have been replaced, solenoids are new. suspicious: when scanning and reading the data flow, very few parameters are shown, except for oil temperature, torque, and other small things, and data such as turbine speed, filling of packages, pressure and solenoids operation is not shown. Tell me your thoughts, what could this be?