Frepal

The car was whining and slipping and going to neutral, so i took the gearbox down. Didnt find anything wrong with the oilpump in the gearbox nothing visual. So i changed the torque converter and still have the same problem . I have changed the pwm, torque lookup solenoid and mounted Sonax valve kit. right now i cant even drive the car. When i have the car on the lift and put in drive the Wheels won't move if i dont shut of the ESP IF i have the ESP on the wheels just move a little bit when in drive and then brakes and move a little bit and then brakes and then just dont move at all.
what should i do next? I have a chinese Star im pretty new using this so Any help is a step forward