It is on the back of the transmission.
Follow the passenger side axle to the transmission, the sensor is located in housing the axle fits into.
i think what your looking for is just above the back up/ netural switch
Idle speed is computer controlled and is not adjustable. If the speed is incorrect, there is a computer, sensor, or actuator failure.
The only speed sensor on the engine is inside the distributor.
In a Chrysler New Yorker, speed sensors are typically located on the transmission. Specifically, the vehicle may have a vehicle speed sensor (VSS) mounted on the transmission case, which detects the speed of the output shaft. Some models may also have additional sensors in the differential or wheel speed sensors for the anti-lock braking system (ABS). Always consult the vehicle's service manual for precise locations based on the specific model year.
The output speed sensor is the two wire sensor on the front, far driver side of the transmission.
Not a Chrysler tech but the VSS (vehicle speed sensor) is normally a sensor at the transmission in front wheel drive cars located at the differential housing in order to count drive axle RPM. In rear wheel drive cars/trucks it would be found at the differential in the rear axle.
The input and output speed sensors are located on the front of the trans. They have two wires and the input sensor is closer to the engine.
I've bee told that the 1991 model doesn't have a cable it works off the speed sensor.
The vehicle speed signal comes from the transmission output speed sensor, driver side of the transmission. It is the rear most two wire sensor.
The maximum speed of the Chrysler new yorker automatic 2 door 8cyl 350hp 1960 is 3000 rpm.