Electro/Hydraulic Valve Body
Located in the oil sump, the valve body is the electro/hydraulic control center for regulating and distributing pressurized transmission fluid for activating the various clutches, torque converter variable lock up, and regulation of main line oil pressures. See Fig 1 . Sub components of the valve body assembly include:
- Manual valve.
- One main pressure regulator solenoid (Pressure Regulator Force Motor Solenoid - "GM term").
- One torque converter regulator solenoid (also serves the Reverse Lock out function).
- Three MV shift solenoids (When activated in a coded sequence provide shifts for 1-2,2- 3,3-4,4-5).
- The spool valves and springs for controlling apply pressures, activating shifts, regulating torque converter lock up, etc.
- Four accumulator chambers for "cushioning" the transmission fluid apply pressure during upshifts 1-2, 2-3, 3-4, 4-5.