Drive Range - Fourth Gear: Notes
WARNING: This page is about a different car, the 2003 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
When operating conditions are appropriate, the TCM de-energizes the 1-2, 2-3, reverse shift solenoid valve assembly (S3) to shift the transmission into Fourth gear. The manual valve remains in the DRIVE (D) position and line (2) pressure continues to feed the drive (19) fluid circuit.