This level of detail is impossible to guess.
: Detailed steps for removing the electro-hydraulic control, the engine connection, oil pressure pump, and torque converter. Exploded View Diagrams Zf 4wg 150 Transmission Repair Manuall
The valve block manages the hydraulic flow to different clutches. Repairs here involve cleaning the small orifices and ensuring the solenoids are clicking within their specified voltage ranges. This level of detail is impossible to guess