Valve Body

Valve Body

Valve Body:

The valve body contains 8 solenoid valves:
- three pulse width modulation (PWM) solenoid valves.
- three shift solenoid (on/off) valves.
- two main regulating valve pressure control solenoids.

The individual clutches and bands are supplied pressure from the PWM solenoid valves and the shift solenoid (on/off) valves and thus the gears are shifted.

The PWM solenoid valves allow direct actuation of the clutches and bands to make sure of extremely smooth gear shifting through precise pressure regulation.

The shift solenoid (on/off) valves switch the hydraulic path to the clutches and bands, reducing the number of required modulating valves.

The main regulating valve (variable force solenoid) makes sure that sufficient hydraulic pressure is available in all operating conditions.

PWM Solenoid Valves
PWM solenoid valves control the pressure to the bands and clutches.

Shift Solenoid (On/Off) Valves
The shift solenoid (on/off) valves switch the different oil passages in the valve body to direct the pressure to the individual clutches and bands.

The shift solenoid valves are needed for direct actuation of the individual clutches and bands.

Main Regulating Valves
The main regulating valve (pressure control solenoids) control the required main line pressure for the individual transmission ranges.

The main line pressure is controlled dependent on the current engine load.