A hydraulic control apparatus, provided with a manual shift valve that
outputs a forward range pressure and a reverse range pressure, and a
linear solenoid valve that outputs an engagement pressure to the
hydraulic servo that engages during reverse travel when energized,
includes a fourth clutch relay valve that is interposed between the
linear solenoid valve and the hydraulic servo. The fourth clutch relay
valve communicates an engagement pressure of the linear solenoid valve to
the hydraulic servo by locking in the normal position when a signal
pressure of the solenoid valve is input, and communicates a reverse range
pressure to the hydraulic servo by being switched to a fail position by
the reverse range pressure during a failure in which the fourth clutch
relay valve is de-energized. Thereby, it is possible to establish a
reverse speed during a failure in which the solenoid valve is
de-energized.