1-2 Shift Valve
WARNING: This page is about a different car, the 2008 Pontiac G5 and 2008 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.
The 1-2 signal fluid pressure shifts the valve into the downshifted position against a spring force, and the following changes occur:
- The 2-3 drive fluid circuit is open to an exhaust past the valve
- The intermediate band fluid is exhausted past the valve
- the Lo/PRN fluid is routed into the low band fluid circuit