940 L4-2.3L SOHC VIN 88 B230F (1992)
Governor, Automatic Transmission: Description and Operation
Governor Location
The governor is mounted on the output shaft and rotates at the same speed. Acting as a combined centrifugal valve and spring-loaded valve, the
device converts the line pressure to a value which varies with the shaft speed or, in other words, with the speed of the car. This is known as the
governor pressure. Oil is supplied to the governor through the gear selector valve. The variable governor pressure is supplied to the control
system, in which it is used to operate the shift and downshift functions.
Governor Position At Rest
In illustration above, the governor is shown with the car and output shaft at rest. In this case, the line pressure outlet is blocked and the governor
pressure is nil. Since the latter must be increased continuously in proportion to the speed of the car in order to perform the control system
functions, the governor is designed to operate in two stages.
Governor Position At Low Speed
In illustration above, the governor is shown with the car moving slowly and the output shaft (governor) speed is low. As the governor rotates, the
