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Home >> Pontiac >> 2009 >> Vibe Base, 2.4 0, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 54 (Automatic Transmission - 4T80-E - Removal & Installation, Service, Overhaul, Troubleshooting & Diagnosis) >> Description And Operation >> Automatic Transmission Hydraulic Diagrams >> Overdrive Range, Fourth Gear >> Fourth Band Applies >> 1-2 Shift Solenoid (SS) Valve

1-2 Shift Solenoid (SS) Valve

WARNING: This page is about a different car, the 2009 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.

The PCM energizes (turns ON) the 1-2 SS valve. The PCM blocks the exhaust of 1-2 SS valve fluid to create high fluid pressure within the valve. High pressure at the 2-3 shift solenoid (SS) valve, at the end of the 1-2 shift valve, holds the valve in the upshifted position, while fluid from the 1-2 SS valve is routed to the end of the 3-4 shift valve.

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