Solenoid Valves: Notes

Four solenoid valves are installed in the hydraulic unit. Two of the solenoid valves are designed as proportional directional valves (1 - for clutch control and 1 - for selection angle cylinder actuation). The other two solenoid valves are pressure control valves (both used for shift travel cylinder actuation).

Fig 1: Identifying Hydraulic Line, Supply Line And Accumulator

Courtesy of BMW OF NORTH AMERICA, INC.

Hydraulic Unit in vehicle with intake manifold removed