Abstract: A motor operatively connected to a pump which provides the transmission hydraulic control system with pressurized fluid is activatable automatically in response to insufficient pressure being stored in an accumulator when the ignition switch is closed and by a button switch operated by a button disposed on the gear shift lever when the ignition switch is open and insufficient pressure prevails in said accumulator whereby it is possible to shift gears even when the engine is stopped.

Abstract: A countershaft-type automatic power transmission in which a countershaft gear assembly is operated by a hydraulic control system controlled by electric control means responsive to various operational variables of a vehicle and in which a clutch assembly is operated between the coupled and uncoupled conditions by clutch control valve means which is also controlled by the electric control means, the power transmission further featuring throttle valve control means adapted to move the carburetor throttle valve to a position to produce an idling condition in the engine independently of the accelerator pedal when the clutch assembly is in the uncoupled condition.

Abstract: A countershaft type power transmission comprises a select shaft operatively connected with a select motor and a shift shaft operatively connected with a shift motor. The select motor and shift motor actuate the select shaft and shift shaft in response to various vehicle operating conditions, including the position of a control lever so as to engage a desired gear within the transmission. Means is provided for temporarily connecting the operative connecton between the shift motor and the shift shaft when the control lever is moved toward and into the reverse position, so that the shift shaft can be manually rotated via a mechanical connection between the control lever and the shift shaft to engage reverse gear.