valve s 4 operate as control pressure on an opposite side of the second switch valve 108 from which the d range pressure operates that is the conversion of port communication can be accomplished by the operation of both the l range pressure and the pressure of the fourth solenoid valve s 4 in more detail with reference to fig2 and fig3 the second switch valve 10 includes multiple ports and a valve spool with lands as follows a first port 20 receives the output pressure from the second pressure control valve 8 second and third ports 24 and 22 supply hydraulic pressure from first port 20 respectively to the first brake b 1 and the second clutch c 2 a fourth port 26 receives d range pressure as control pressure a fifth port 28 formed in a side of the second switch valve 10 opposite the fourth port 26 receives control pressure from the fourth solenoid valve s 4 a sixth port 30 formed adjacent to the fifth port 28 receives line pressure as control pressure exhaust ports ex 1 and ex 2 exhaust the hydraulic pressure supplied to the second and third ports 24 and 22 respectively the.