Location of automatic transmission speed sensors on Chevrolet Lacetti cars:
Automatic transmission Aisin 66-41
* Input shaft speed sensor: Located on the front of the gearbox, under the automatic transmission control cable.
* Output shaft speed sensor: Located on the rear of the transmission, at the bottom.
Automatic transmission Aisin 66-42
* Input shaft speed sensor: Integrated into the wiring harness connected to the automatic transmission control unit.
* Output shaft speed sensor: Absent.