Shift Solenoid No 1, 2 (SS1, SS2)
WARNING: This page is about a different car, the 2008 Suzuki Swift +, 2008 Pontiac Wave, and 2008 Chevrolet Aveo. However, it is still accessible from the selected car via links, so may be relevant.
Two shift solenoids are installed directly in the valve body. The solenoids operate of ON and OFF by the control signal from transmission control module (TCM). Combinations of 2 solenoids, SS1 (2) and SS2 (1) changes gear ranges.