Valve Body: Description and Operation

Transmission Valve Body Solenoid Valves:

Solenoid valves in valve body N 88 - N 93

In the valve body on the gearbox there are 7 solenoid valves, which are
controlled from the Digimat control unit and direct the oil pressure created by the ATF pump via the shift valves.

The solenoid valves EV 1 to EV 4 supply oil pressure to the plate clutches and brakes.

The gearshift transitions are influenced by the solenoid valves EV 5 and EV 7. The modulation valve EM 6 regulates the main pressure in the valve body.

The main pressure is created via the electrical current in the modulation valve depending on gear, the shift programme Eco/Sport, the load and the speed. With a small current a higher main pressure is created and vice versa.